./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 03:40:52,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:40:52,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:40:52,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:40:52,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:40:52,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:40:52,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:40:52,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:40:52,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:40:52,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:40:52,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:40:52,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:40:52,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:40:52,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:40:52,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:40:52,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:40:52,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:40:52,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:40:52,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:40:52,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:40:52,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:40:52,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:40:52,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:40:52,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:40:52,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:40:52,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:40:52,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:40:52,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:40:52,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:40:52,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:40:52,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:40:52,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:40:52,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:40:52,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:40:52,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:40:52,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:40:52,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:40:52,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:40:52,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:40:52,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:40:52,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:40:52,802 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:40:52,836 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:40:52,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:40:52,838 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:40:52,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:40:52,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:40:52,839 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:40:52,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:40:52,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:40:52,840 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:40:52,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:40:52,841 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:40:52,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:40:52,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:40:52,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:40:52,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:40:52,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:40:52,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:40:52,842 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:40:52,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:40:52,842 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:40:52,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:40:52,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:40:52,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:40:52,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:40:52,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:40:52,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:40:52,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:40:52,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:40:52,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:40:52,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:40:52,844 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:40:52,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:40:52,845 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:40:52,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:40:52,845 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:40:52,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:40:53,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:40:53,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:40:53,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:40:53,190 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:40:53,190 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:40:53,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-31 03:40:54,328 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:40:54,554 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:40:54,555 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-31 03:40:54,570 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fd67316/58c228e8c5ff4d7cae632bc78ee7c162/FLAGa7b9a4e1c [2023-08-31 03:40:54,583 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fd67316/58c228e8c5ff4d7cae632bc78ee7c162 [2023-08-31 03:40:54,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:40:54,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:40:54,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:40:54,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:40:54,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:40:54,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b8fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54, skipping insertion in model container [2023-08-31 03:40:54,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:40:54,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:40:54,741 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-queue-add-2.wvr.c[2696,2709] [2023-08-31 03:40:54,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:40:54,753 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:40:54,769 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-queue-add-2.wvr.c[2696,2709] [2023-08-31 03:40:54,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:40:54,777 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:40:54,778 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:40:54,783 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:40:54,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54 WrapperNode [2023-08-31 03:40:54,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:40:54,785 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:40:54,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:40:54,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:40:54,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,833 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 158 [2023-08-31 03:40:54,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:40:54,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:40:54,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:40:54,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:40:54,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,873 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:40:54,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:40:54,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:40:54,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:40:54,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54" (1/1) ... [2023-08-31 03:40:54,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:40:54,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:40:54,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 03:40:54,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 03:40:54,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:40:54,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:40:54,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:40:54,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:40:54,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:40:54,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:40:54,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:40:54,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:40:54,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:40:54,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:40:54,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 03:40:54,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:40:54,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:40:54,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:40:54,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:40:54,990 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 03:40:55,112 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:40:55,120 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:40:55,384 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:40:55,456 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:40:55,456 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 03:40:55,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:40:55 BoogieIcfgContainer [2023-08-31 03:40:55,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:40:55,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:40:55,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:40:55,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:40:55,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:40:54" (1/3) ... [2023-08-31 03:40:55,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da9fd9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:40:55, skipping insertion in model container [2023-08-31 03:40:55,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:40:54" (2/3) ... [2023-08-31 03:40:55,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da9fd9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:40:55, skipping insertion in model container [2023-08-31 03:40:55,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:40:55" (3/3) ... [2023-08-31 03:40:55,463 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-08-31 03:40:55,467 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:40:55,483 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:40:55,483 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:40:55,483 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:40:55,516 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 03:40:55,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 272 flow [2023-08-31 03:40:55,618 INFO L130 PetriNetUnfolder]: 11/126 cut-off events. [2023-08-31 03:40:55,618 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:40:55,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 11/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 3 conditions per place. [2023-08-31 03:40:55,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 128 transitions, 272 flow [2023-08-31 03:40:55,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 118 transitions, 248 flow [2023-08-31 03:40:55,630 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:40:55,640 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 118 transitions, 248 flow [2023-08-31 03:40:55,644 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 118 transitions, 248 flow [2023-08-31 03:40:55,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 118 transitions, 248 flow [2023-08-31 03:40:55,676 INFO L130 PetriNetUnfolder]: 11/118 cut-off events. [2023-08-31 03:40:55,676 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:40:55,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 11/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 93. Up to 3 conditions per place. [2023-08-31 03:40:55,678 INFO L119 LiptonReduction]: Number of co-enabled transitions 538 [2023-08-31 03:40:58,571 INFO L134 LiptonReduction]: Checked pairs total: 676 [2023-08-31 03:40:58,572 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-31 03:40:58,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:40:58,595 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;@4f1c5f41, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:40:58,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 03:40:58,606 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-31 03:40:58,606 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:40:58,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:40:58,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:40:58,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:40:58,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:40:58,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1821199336, now seen corresponding path program 1 times [2023-08-31 03:40:58,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:40:58,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956941744] [2023-08-31 03:40:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:40:58,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:40:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:40:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:40:59,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:40:59,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956941744] [2023-08-31 03:40:59,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956941744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:40:59,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:40:59,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:40:59,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394781416] [2023-08-31 03:40:59,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:40:59,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:40:59,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:40:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:40:59,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:40:59,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 249 [2023-08-31 03:40:59,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:40:59,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 249 [2023-08-31 03:40:59,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:40:59,145 INFO L130 PetriNetUnfolder]: 45/87 cut-off events. [2023-08-31 03:40:59,145 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 03:40:59,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 87 events. 45/87 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 18 based on Foata normal form. 4/63 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-08-31 03:40:59,148 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 14 selfloop transitions, 2 changer transitions 5/23 dead transitions. [2023-08-31 03:40:59,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 23 transitions, 106 flow [2023-08-31 03:40:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:40:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:40:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 449 transitions. [2023-08-31 03:40:59,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508032128514056 [2023-08-31 03:40:59,165 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 449 transitions. [2023-08-31 03:40:59,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 449 transitions. [2023-08-31 03:40:59,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:40:59,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 449 transitions. [2023-08-31 03:40:59,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,183 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,184 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 449 transitions. [2023-08-31 03:40:59,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 23 transitions, 106 flow [2023-08-31 03:40:59,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 03:40:59,187 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2023-08-31 03:40:59,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2023-08-31 03:40:59,192 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-31 03:40:59,192 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2023-08-31 03:40:59,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:40:59,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:40:59,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:40:59,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:40:59,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:40:59,200 INFO L85 PathProgramCache]: Analyzing trace with hash -885649661, now seen corresponding path program 1 times [2023-08-31 03:40:59,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:40:59,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755671375] [2023-08-31 03:40:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:40:59,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:40:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:40:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:40:59,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:40:59,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755671375] [2023-08-31 03:40:59,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755671375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:40:59,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:40:59,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:40:59,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508030138] [2023-08-31 03:40:59,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:40:59,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 03:40:59,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:40:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 03:40:59,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-31 03:40:59,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 249 [2023-08-31 03:40:59,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:40:59,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 249 [2023-08-31 03:40:59,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:40:59,632 INFO L130 PetriNetUnfolder]: 72/136 cut-off events. [2023-08-31 03:40:59,632 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-31 03:40:59,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 136 events. 72/136 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 422 event pairs, 15 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 350. Up to 77 conditions per place. [2023-08-31 03:40:59,645 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 32 selfloop transitions, 8 changer transitions 2/43 dead transitions. [2023-08-31 03:40:59,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 218 flow [2023-08-31 03:40:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:40:59,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:40:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 672 transitions. [2023-08-31 03:40:59,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497991967871486 [2023-08-31 03:40:59,648 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 672 transitions. [2023-08-31 03:40:59,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 672 transitions. [2023-08-31 03:40:59,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:40:59,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 672 transitions. [2023-08-31 03:40:59,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,653 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,653 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 6 states and 672 transitions. [2023-08-31 03:40:59,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 218 flow [2023-08-31 03:40:59,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 214 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 03:40:59,654 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 112 flow [2023-08-31 03:40:59,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-08-31 03:40:59,655 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-31 03:40:59,655 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 112 flow [2023-08-31 03:40:59,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:40:59,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:40:59,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 03:40:59,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:40:59,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:40:59,657 INFO L85 PathProgramCache]: Analyzing trace with hash 919629356, now seen corresponding path program 1 times [2023-08-31 03:40:59,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:40:59,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717529286] [2023-08-31 03:40:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:40:59,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:40:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:40:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:40:59,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:40:59,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717529286] [2023-08-31 03:40:59,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717529286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:40:59,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:40:59,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:40:59,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506944904] [2023-08-31 03:40:59,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:40:59,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:40:59,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:40:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:40:59,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:40:59,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 249 [2023-08-31 03:40:59,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:40:59,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 249 [2023-08-31 03:40:59,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:40:59,830 INFO L130 PetriNetUnfolder]: 87/181 cut-off events. [2023-08-31 03:40:59,831 INFO L131 PetriNetUnfolder]: For 122/124 co-relation queries the response was YES. [2023-08-31 03:40:59,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 181 events. 87/181 cut-off events. For 122/124 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 640 event pairs, 12 based on Foata normal form. 17/170 useless extension candidates. Maximal degree in co-relation 577. Up to 109 conditions per place. [2023-08-31 03:40:59,832 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 30 selfloop transitions, 9 changer transitions 2/43 dead transitions. [2023-08-31 03:40:59,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 262 flow [2023-08-31 03:40:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:40:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:40:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-08-31 03:40:59,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708835341365462 [2023-08-31 03:40:59,835 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-08-31 03:40:59,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-08-31 03:40:59,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:40:59,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-08-31 03:40:59,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,838 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,838 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 112 flow. Second operand 4 states and 469 transitions. [2023-08-31 03:40:59,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 262 flow [2023-08-31 03:40:59,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 43 transitions, 249 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-31 03:40:59,840 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 165 flow [2023-08-31 03:40:59,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-31 03:40:59,840 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-08-31 03:40:59,841 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 165 flow [2023-08-31 03:40:59,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:59,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:40:59,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:40:59,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 03:40:59,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:40:59,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:40:59,842 INFO L85 PathProgramCache]: Analyzing trace with hash -86135109, now seen corresponding path program 1 times [2023-08-31 03:40:59,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:40:59,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949405448] [2023-08-31 03:40:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:40:59,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:40:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:40:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:40:59,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:40:59,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949405448] [2023-08-31 03:40:59,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949405448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:40:59,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98183569] [2023-08-31 03:40:59,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:40:59,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:40:59,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:40:59,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:40:59,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 03:41:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:00,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:41:00,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:00,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:00,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98183569] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:00,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:00,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-31 03:41:00,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916785892] [2023-08-31 03:41:00,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:00,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 03:41:00,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 03:41:00,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-31 03:41:00,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 249 [2023-08-31 03:41:00,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 165 flow. Second operand has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:00,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:00,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 249 [2023-08-31 03:41:00,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:00,359 INFO L130 PetriNetUnfolder]: 82/182 cut-off events. [2023-08-31 03:41:00,360 INFO L131 PetriNetUnfolder]: For 327/332 co-relation queries the response was YES. [2023-08-31 03:41:00,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 182 events. 82/182 cut-off events. For 327/332 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 606 event pairs, 36 based on Foata normal form. 13/166 useless extension candidates. Maximal degree in co-relation 733. Up to 158 conditions per place. [2023-08-31 03:41:00,361 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 23 selfloop transitions, 3 changer transitions 11/39 dead transitions. [2023-08-31 03:41:00,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 290 flow [2023-08-31 03:41:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:41:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:41:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 642 transitions. [2023-08-31 03:41:00,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42971887550200805 [2023-08-31 03:41:00,365 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 642 transitions. [2023-08-31 03:41:00,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 642 transitions. [2023-08-31 03:41:00,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:00,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 642 transitions. [2023-08-31 03:41:00,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:00,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:00,369 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:00,369 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 165 flow. Second operand 6 states and 642 transitions. [2023-08-31 03:41:00,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 290 flow [2023-08-31 03:41:00,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 262 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-31 03:41:00,371 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 167 flow [2023-08-31 03:41:00,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=167, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-08-31 03:41:00,372 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-08-31 03:41:00,372 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 167 flow [2023-08-31 03:41:00,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:00,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:00,372 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:00,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 03:41:00,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:00,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:00,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:00,579 INFO L85 PathProgramCache]: Analyzing trace with hash -984099166, now seen corresponding path program 2 times [2023-08-31 03:41:00,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:00,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070428130] [2023-08-31 03:41:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:00,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:01,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:01,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070428130] [2023-08-31 03:41:01,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070428130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:01,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70772217] [2023-08-31 03:41:01,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:41:01,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:01,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:01,058 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:01,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 03:41:01,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:41:01,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:41:01,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 03:41:01,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:01,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:41:01,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:41:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:01,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:01,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:01,556 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 45 treesize of output 37 [2023-08-31 03:41:01,561 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 [2023-08-31 03:41:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:01,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70772217] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:01,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:01,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-31 03:41:01,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056509547] [2023-08-31 03:41:01,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:01,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:41:01,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:01,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:41:01,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:41:02,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-31 03:41:02,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 167 flow. Second operand has 23 states, 23 states have (on average 91.6086956521739) internal successors, (2107), 23 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:02,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:02,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-31 03:41:02,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:03,814 INFO L130 PetriNetUnfolder]: 301/624 cut-off events. [2023-08-31 03:41:03,815 INFO L131 PetriNetUnfolder]: For 1182/1190 co-relation queries the response was YES. [2023-08-31 03:41:03,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 624 events. 301/624 cut-off events. For 1182/1190 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3121 event pairs, 20 based on Foata normal form. 54/569 useless extension candidates. Maximal degree in co-relation 2380. Up to 255 conditions per place. [2023-08-31 03:41:03,820 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 108 selfloop transitions, 68 changer transitions 1/179 dead transitions. [2023-08-31 03:41:03,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 179 transitions, 1278 flow [2023-08-31 03:41:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 03:41:03,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 03:41:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2492 transitions. [2023-08-31 03:41:03,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492431263515603 [2023-08-31 03:41:03,826 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2492 transitions. [2023-08-31 03:41:03,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2492 transitions. [2023-08-31 03:41:03,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:03,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2492 transitions. [2023-08-31 03:41:03,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 95.84615384615384) internal successors, (2492), 26 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:03,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:03,843 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:03,843 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 167 flow. Second operand 26 states and 2492 transitions. [2023-08-31 03:41:03,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 179 transitions, 1278 flow [2023-08-31 03:41:03,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 179 transitions, 1228 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-08-31 03:41:03,849 INFO L231 Difference]: Finished difference. Result has 62 places, 106 transitions, 944 flow [2023-08-31 03:41:03,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=944, PETRI_PLACES=62, PETRI_TRANSITIONS=106} [2023-08-31 03:41:03,850 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-08-31 03:41:03,850 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 106 transitions, 944 flow [2023-08-31 03:41:03,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 91.6086956521739) internal successors, (2107), 23 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:03,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:03,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:03,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 03:41:04,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:04,058 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:04,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:04,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1199743108, now seen corresponding path program 3 times [2023-08-31 03:41:04,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:04,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141913575] [2023-08-31 03:41:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:04,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:04,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:04,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141913575] [2023-08-31 03:41:04,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141913575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:04,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409943326] [2023-08-31 03:41:04,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:41:04,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:04,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:04,600 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:04,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 03:41:04,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:41:04,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:41:04,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 03:41:04,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:04,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:41:04,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:41:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:04,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:05,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:05,118 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 45 treesize of output 37 [2023-08-31 03:41:05,122 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 [2023-08-31 03:41:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:05,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409943326] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:05,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:05,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-31 03:41:05,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860468319] [2023-08-31 03:41:05,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:05,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:41:05,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:41:05,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:41:05,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-31 03:41:05,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 106 transitions, 944 flow. Second operand has 23 states, 23 states have (on average 91.78260869565217) internal successors, (2111), 23 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:05,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:05,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-31 03:41:05,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:06,888 INFO L130 PetriNetUnfolder]: 325/648 cut-off events. [2023-08-31 03:41:06,889 INFO L131 PetriNetUnfolder]: For 1774/1777 co-relation queries the response was YES. [2023-08-31 03:41:06,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 648 events. 325/648 cut-off events. For 1774/1777 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3087 event pairs, 40 based on Foata normal form. 21/564 useless extension candidates. Maximal degree in co-relation 2333. Up to 285 conditions per place. [2023-08-31 03:41:06,893 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 103 selfloop transitions, 52 changer transitions 0/157 dead transitions. [2023-08-31 03:41:06,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 157 transitions, 1511 flow [2023-08-31 03:41:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 03:41:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 03:41:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1712 transitions. [2023-08-31 03:41:06,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3819723337795627 [2023-08-31 03:41:06,897 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1712 transitions. [2023-08-31 03:41:06,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1712 transitions. [2023-08-31 03:41:06,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:06,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1712 transitions. [2023-08-31 03:41:06,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 95.11111111111111) internal successors, (1712), 18 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:06,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:06,905 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:06,905 INFO L175 Difference]: Start difference. First operand has 62 places, 106 transitions, 944 flow. Second operand 18 states and 1712 transitions. [2023-08-31 03:41:06,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 157 transitions, 1511 flow [2023-08-31 03:41:06,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 157 transitions, 1205 flow, removed 149 selfloop flow, removed 5 redundant places. [2023-08-31 03:41:06,914 INFO L231 Difference]: Finished difference. Result has 79 places, 111 transitions, 900 flow [2023-08-31 03:41:06,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=900, PETRI_PLACES=79, PETRI_TRANSITIONS=111} [2023-08-31 03:41:06,915 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 58 predicate places. [2023-08-31 03:41:06,915 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 111 transitions, 900 flow [2023-08-31 03:41:06,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 91.78260869565217) internal successors, (2111), 23 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:06,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:06,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:06,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 03:41:07,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:07,122 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:07,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:07,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1201797661, now seen corresponding path program 1 times [2023-08-31 03:41:07,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:07,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876940370] [2023-08-31 03:41:07,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:07,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:07,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:07,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876940370] [2023-08-31 03:41:07,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876940370] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:07,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71469961] [2023-08-31 03:41:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:07,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:07,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:07,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:07,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 03:41:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:07,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 03:41:07,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:41:07,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:07,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:07,941 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 53 treesize of output 29 [2023-08-31 03:41:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:41:08,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71469961] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:08,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:08,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-08-31 03:41:08,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386241514] [2023-08-31 03:41:08,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:08,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 03:41:08,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:08,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 03:41:08,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:41:08,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-31 03:41:08,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 111 transitions, 900 flow. Second operand has 19 states, 19 states have (on average 90.26315789473684) internal successors, (1715), 19 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:08,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:08,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-31 03:41:08,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:08,951 INFO L130 PetriNetUnfolder]: 365/730 cut-off events. [2023-08-31 03:41:08,951 INFO L131 PetriNetUnfolder]: For 1900/1900 co-relation queries the response was YES. [2023-08-31 03:41:08,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3203 conditions, 730 events. 365/730 cut-off events. For 1900/1900 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3606 event pairs, 57 based on Foata normal form. 10/680 useless extension candidates. Maximal degree in co-relation 2904. Up to 599 conditions per place. [2023-08-31 03:41:08,956 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 125 selfloop transitions, 30 changer transitions 4/160 dead transitions. [2023-08-31 03:41:08,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 160 transitions, 1458 flow [2023-08-31 03:41:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 03:41:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 03:41:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1396 transitions. [2023-08-31 03:41:08,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37376171352074966 [2023-08-31 03:41:08,960 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1396 transitions. [2023-08-31 03:41:08,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1396 transitions. [2023-08-31 03:41:08,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:08,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1396 transitions. [2023-08-31 03:41:08,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.06666666666666) internal successors, (1396), 15 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:08,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:08,968 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:08,968 INFO L175 Difference]: Start difference. First operand has 79 places, 111 transitions, 900 flow. Second operand 15 states and 1396 transitions. [2023-08-31 03:41:08,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 160 transitions, 1458 flow [2023-08-31 03:41:08,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 160 transitions, 1409 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-31 03:41:08,978 INFO L231 Difference]: Finished difference. Result has 90 places, 125 transitions, 1098 flow [2023-08-31 03:41:08,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1098, PETRI_PLACES=90, PETRI_TRANSITIONS=125} [2023-08-31 03:41:08,978 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-08-31 03:41:08,978 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 125 transitions, 1098 flow [2023-08-31 03:41:08,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.26315789473684) internal successors, (1715), 19 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:08,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:08,979 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:08,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:41:09,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:09,186 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:09,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:09,186 INFO L85 PathProgramCache]: Analyzing trace with hash 232462075, now seen corresponding path program 4 times [2023-08-31 03:41:09,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:09,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210877151] [2023-08-31 03:41:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:09,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:09,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:09,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210877151] [2023-08-31 03:41:09,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210877151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:09,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372541740] [2023-08-31 03:41:09,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:41:09,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:09,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:09,896 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:09,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 03:41:09,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:41:09,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:41:09,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 03:41:09,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:10,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:41:10,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:41:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:41:10,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:10,097 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_216 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-08-31 03:41:10,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:10,105 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 45 treesize of output 37 [2023-08-31 03:41:10,108 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 [2023-08-31 03:41:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:41:10,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372541740] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:10,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:41:10,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 18 [2023-08-31 03:41:10,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767513286] [2023-08-31 03:41:10,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:41:10,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 03:41:10,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:10,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 03:41:10,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=266, Unknown=1, NotChecked=32, Total=342 [2023-08-31 03:41:10,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-31 03:41:10,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 125 transitions, 1098 flow. Second operand has 6 states, 6 states have (on average 94.33333333333333) internal successors, (566), 6 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:10,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:10,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-31 03:41:10,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:10,206 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (not (= (select (select |c_#memory_int| c_~q~0.base) .cse0) 0)) (forall ((v_ArrVal_216 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) c_~q~0.base) .cse0) 0))))) is different from false [2023-08-31 03:41:10,326 INFO L130 PetriNetUnfolder]: 398/774 cut-off events. [2023-08-31 03:41:10,326 INFO L131 PetriNetUnfolder]: For 3282/3292 co-relation queries the response was YES. [2023-08-31 03:41:10,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3753 conditions, 774 events. 398/774 cut-off events. For 3282/3292 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3807 event pairs, 56 based on Foata normal form. 12/734 useless extension candidates. Maximal degree in co-relation 3452. Up to 622 conditions per place. [2023-08-31 03:41:10,331 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 129 selfloop transitions, 31 changer transitions 0/163 dead transitions. [2023-08-31 03:41:10,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 163 transitions, 1806 flow [2023-08-31 03:41:10,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:41:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:41:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 493 transitions. [2023-08-31 03:41:10,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39598393574297186 [2023-08-31 03:41:10,333 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 493 transitions. [2023-08-31 03:41:10,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 493 transitions. [2023-08-31 03:41:10,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:10,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 493 transitions. [2023-08-31 03:41:10,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:10,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:10,336 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:10,337 INFO L175 Difference]: Start difference. First operand has 90 places, 125 transitions, 1098 flow. Second operand 5 states and 493 transitions. [2023-08-31 03:41:10,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 163 transitions, 1806 flow [2023-08-31 03:41:10,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 163 transitions, 1712 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-08-31 03:41:10,348 INFO L231 Difference]: Finished difference. Result has 87 places, 140 transitions, 1365 flow [2023-08-31 03:41:10,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1365, PETRI_PLACES=87, PETRI_TRANSITIONS=140} [2023-08-31 03:41:10,350 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 66 predicate places. [2023-08-31 03:41:10,350 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 140 transitions, 1365 flow [2023-08-31 03:41:10,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 94.33333333333333) internal successors, (566), 6 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:10,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:10,351 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:10,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 03:41:10,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:10,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:10,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:10,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1314770777, now seen corresponding path program 2 times [2023-08-31 03:41:10,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:10,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889250195] [2023-08-31 03:41:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:10,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:10,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:10,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889250195] [2023-08-31 03:41:10,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889250195] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:10,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921141626] [2023-08-31 03:41:10,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:41:10,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:10,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:10,943 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:10,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 03:41:11,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:41:11,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:41:11,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 03:41:11,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:41:11,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:11,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:11,217 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 42 treesize of output 26 [2023-08-31 03:41:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:41:11,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921141626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:11,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:11,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 18 [2023-08-31 03:41:11,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913363948] [2023-08-31 03:41:11,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:11,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:41:11,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:11,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:41:11,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:41:11,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-31 03:41:11,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 140 transitions, 1365 flow. Second operand has 20 states, 20 states have (on average 90.25) internal successors, (1805), 20 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:11,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:11,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-31 03:41:11,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:12,236 INFO L130 PetriNetUnfolder]: 421/828 cut-off events. [2023-08-31 03:41:12,236 INFO L131 PetriNetUnfolder]: For 3957/3957 co-relation queries the response was YES. [2023-08-31 03:41:12,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4248 conditions, 828 events. 421/828 cut-off events. For 3957/3957 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4207 event pairs, 61 based on Foata normal form. 2/779 useless extension candidates. Maximal degree in co-relation 3921. Up to 616 conditions per place. [2023-08-31 03:41:12,246 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 129 selfloop transitions, 41 changer transitions 17/188 dead transitions. [2023-08-31 03:41:12,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 188 transitions, 2020 flow [2023-08-31 03:41:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 03:41:12,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 03:41:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1401 transitions. [2023-08-31 03:41:12,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3751004016064257 [2023-08-31 03:41:12,251 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1401 transitions. [2023-08-31 03:41:12,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1401 transitions. [2023-08-31 03:41:12,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:12,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1401 transitions. [2023-08-31 03:41:12,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.4) internal successors, (1401), 15 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:12,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:12,258 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:12,258 INFO L175 Difference]: Start difference. First operand has 87 places, 140 transitions, 1365 flow. Second operand 15 states and 1401 transitions. [2023-08-31 03:41:12,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 188 transitions, 2020 flow [2023-08-31 03:41:12,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 188 transitions, 2008 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 03:41:12,269 INFO L231 Difference]: Finished difference. Result has 103 places, 142 transitions, 1489 flow [2023-08-31 03:41:12,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1489, PETRI_PLACES=103, PETRI_TRANSITIONS=142} [2023-08-31 03:41:12,270 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 82 predicate places. [2023-08-31 03:41:12,270 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 142 transitions, 1489 flow [2023-08-31 03:41:12,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.25) internal successors, (1805), 20 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:12,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:12,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:12,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 03:41:12,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:12,476 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:12,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:12,477 INFO L85 PathProgramCache]: Analyzing trace with hash -783438641, now seen corresponding path program 3 times [2023-08-31 03:41:12,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:12,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192880637] [2023-08-31 03:41:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:12,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:12,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:12,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192880637] [2023-08-31 03:41:12,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192880637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:12,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077814732] [2023-08-31 03:41:12,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:41:12,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:12,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:12,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:12,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 03:41:13,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:41:13,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:41:13,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-31 03:41:13,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:13,037 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 11 treesize of output 7 [2023-08-31 03:41:13,070 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 11 treesize of output 7 [2023-08-31 03:41:13,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:41:13,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:41:13,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 03:41:13,279 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:41:13,280 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:13,281 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 17 treesize of output 10 [2023-08-31 03:41:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:13,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:13,520 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) c_~q~0.base) .cse0)) 2)) (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) c_~q~0.base) .cse0)))))) (< c_~q_back~0 0) (<= c_~n~0 (+ c_~q_back~0 1))) is different from false [2023-08-31 03:41:13,568 WARN L839 $PredicateComparison]: unable to prove that (or (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~q_back~0 0) (<= c_~n~0 (+ c_~q_back~0 1)) (let ((.cse1 (+ (* c_~q_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ (* 4 c_~q_back~0) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_289 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1)) 2)) (not (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2) 1))))) (forall ((v_ArrVal_289 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse3 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1)))) (not (= (select (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2) 1)))))))) is different from false [2023-08-31 03:41:13,597 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse2 (+ (* c_~q_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* 4 c_~q_back~0) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse4 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_287 Int) (v_ArrVal_289 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_287)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1)) (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)) 2))))) (forall ((v_ArrVal_287 Int) (v_ArrVal_289 (Array Int Int))) (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_287)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)))) (not (= (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1))))))) (< c_~q_back~0 0) (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (<= c_~n~0 (+ c_~q_back~0 1))) is different from false [2023-08-31 03:41:13,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:13,626 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 2 case distinctions, treesize of input 75 treesize of output 60 [2023-08-31 03:41:13,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:13,633 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 108 treesize of output 100 [2023-08-31 03:41:13,638 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 68 treesize of output 56 [2023-08-31 03:41:13,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:13,646 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 55 treesize of output 51 [2023-08-31 03:41:13,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:13,729 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 60 [2023-08-31 03:41:13,732 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:41:13,737 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:41:13,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2023-08-31 03:41:13,744 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:41:13,745 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 40 treesize of output 32 [2023-08-31 03:41:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-31 03:41:13,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077814732] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:13,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:13,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-08-31 03:41:13,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280521411] [2023-08-31 03:41:13,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:13,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:41:13,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:13,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:41:13,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=497, Unknown=21, NotChecked=144, Total=756 [2023-08-31 03:41:13,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-08-31 03:41:13,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 142 transitions, 1489 flow. Second operand has 28 states, 28 states have (on average 67.67857142857143) internal successors, (1895), 28 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:13,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:13,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-08-31 03:41:13,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:14,083 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (< c_~q_back~0 0)) (.cse7 (<= c_~n~0 (+ c_~q_back~0 1))) (.cse2 (+ (* c_~q_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* 4 c_~q_back~0) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (or (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse4 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_287 Int) (v_ArrVal_289 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_287)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1)) (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)) 2))))) (forall ((v_ArrVal_287 Int) (v_ArrVal_289 (Array Int Int))) (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_287)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)))) (not (= (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1))))))) .cse6 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse7) (or (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse6 .cse7 (and (forall ((v_ArrVal_289 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse8 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)) 2)) (not (= (select (select .cse8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1))))) (forall ((v_ArrVal_289 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse9 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)))) (not (= (select (select .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1))))))))) is different from false [2023-08-31 03:41:17,087 INFO L130 PetriNetUnfolder]: 544/1062 cut-off events. [2023-08-31 03:41:17,088 INFO L131 PetriNetUnfolder]: For 5566/5566 co-relation queries the response was YES. [2023-08-31 03:41:17,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5446 conditions, 1062 events. 544/1062 cut-off events. For 5566/5566 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5761 event pairs, 75 based on Foata normal form. 3/999 useless extension candidates. Maximal degree in co-relation 5343. Up to 757 conditions per place. [2023-08-31 03:41:17,095 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 158 selfloop transitions, 83 changer transitions 8/250 dead transitions. [2023-08-31 03:41:17,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 250 transitions, 2814 flow [2023-08-31 03:41:17,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 03:41:17,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 03:41:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1631 transitions. [2023-08-31 03:41:17,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28479133927012396 [2023-08-31 03:41:17,101 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1631 transitions. [2023-08-31 03:41:17,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1631 transitions. [2023-08-31 03:41:17,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:17,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1631 transitions. [2023-08-31 03:41:17,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 70.91304347826087) internal successors, (1631), 23 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:17,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 249.0) internal successors, (5976), 24 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:17,120 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 249.0) internal successors, (5976), 24 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:17,121 INFO L175 Difference]: Start difference. First operand has 103 places, 142 transitions, 1489 flow. Second operand 23 states and 1631 transitions. [2023-08-31 03:41:17,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 250 transitions, 2814 flow [2023-08-31 03:41:17,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 250 transitions, 2725 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-08-31 03:41:17,142 INFO L231 Difference]: Finished difference. Result has 122 places, 198 transitions, 2353 flow [2023-08-31 03:41:17,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2353, PETRI_PLACES=122, PETRI_TRANSITIONS=198} [2023-08-31 03:41:17,143 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2023-08-31 03:41:17,144 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 198 transitions, 2353 flow [2023-08-31 03:41:17,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 67.67857142857143) internal successors, (1895), 28 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:17,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:17,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:17,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 03:41:17,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:17,356 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:17,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:17,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1149990549, now seen corresponding path program 4 times [2023-08-31 03:41:17,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:17,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027793756] [2023-08-31 03:41:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:17,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:17,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:17,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027793756] [2023-08-31 03:41:17,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027793756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:17,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180349012] [2023-08-31 03:41:17,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:41:17,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:17,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:17,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:17,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 03:41:18,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:41:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:41:18,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 03:41:18,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:41:18,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-31 03:41:18,255 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 03:41:18,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 10 [2023-08-31 03:41:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:41:18,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:18,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:18,441 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 86 treesize of output 70 [2023-08-31 03:41:18,446 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 57 treesize of output 45 [2023-08-31 03:41:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:41:18,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180349012] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:18,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:18,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-08-31 03:41:18,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563548674] [2023-08-31 03:41:18,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:18,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 03:41:18,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:18,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 03:41:18,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=514, Unknown=1, NotChecked=0, Total=600 [2023-08-31 03:41:19,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-31 03:41:19,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 198 transitions, 2353 flow. Second operand has 25 states, 25 states have (on average 70.84) internal successors, (1771), 25 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:19,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:19,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-31 03:41:19,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:20,039 INFO L130 PetriNetUnfolder]: 548/1082 cut-off events. [2023-08-31 03:41:20,039 INFO L131 PetriNetUnfolder]: For 6867/6867 co-relation queries the response was YES. [2023-08-31 03:41:20,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6022 conditions, 1082 events. 548/1082 cut-off events. For 6867/6867 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6007 event pairs, 64 based on Foata normal form. 2/1033 useless extension candidates. Maximal degree in co-relation 5910. Up to 862 conditions per place. [2023-08-31 03:41:20,047 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 168 selfloop transitions, 57 changer transitions 22/248 dead transitions. [2023-08-31 03:41:20,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 248 transitions, 3109 flow [2023-08-31 03:41:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 03:41:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 03:41:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1466 transitions. [2023-08-31 03:41:20,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29437751004016066 [2023-08-31 03:41:20,054 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1466 transitions. [2023-08-31 03:41:20,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1466 transitions. [2023-08-31 03:41:20,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:20,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1466 transitions. [2023-08-31 03:41:20,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 73.3) internal successors, (1466), 20 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:20,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 249.0) internal successors, (5229), 21 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:20,062 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 249.0) internal successors, (5229), 21 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:20,062 INFO L175 Difference]: Start difference. First operand has 122 places, 198 transitions, 2353 flow. Second operand 20 states and 1466 transitions. [2023-08-31 03:41:20,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 248 transitions, 3109 flow [2023-08-31 03:41:20,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 248 transitions, 2959 flow, removed 61 selfloop flow, removed 9 redundant places. [2023-08-31 03:41:20,090 INFO L231 Difference]: Finished difference. Result has 137 places, 200 transitions, 2392 flow [2023-08-31 03:41:20,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2392, PETRI_PLACES=137, PETRI_TRANSITIONS=200} [2023-08-31 03:41:20,091 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2023-08-31 03:41:20,091 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 200 transitions, 2392 flow [2023-08-31 03:41:20,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 70.84) internal successors, (1771), 25 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:20,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:20,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:20,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 03:41:20,297 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,SelfDestructingSolverStorable10 [2023-08-31 03:41:20,298 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:20,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:20,298 INFO L85 PathProgramCache]: Analyzing trace with hash -427006029, now seen corresponding path program 5 times [2023-08-31 03:41:20,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:20,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044924155] [2023-08-31 03:41:20,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:20,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:41:20,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:20,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044924155] [2023-08-31 03:41:20,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044924155] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:20,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973578256] [2023-08-31 03:41:20,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:41:20,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:20,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:20,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:20,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 03:41:20,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:41:20,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:41:20,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:41:20,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:41:20,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:41:20,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973578256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:20,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:20,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-31 03:41:20,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087436383] [2023-08-31 03:41:20,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:20,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 03:41:20,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:20,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 03:41:20,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-31 03:41:20,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 249 [2023-08-31 03:41:20,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 200 transitions, 2392 flow. Second operand has 18 states, 18 states have (on average 103.72222222222223) internal successors, (1867), 18 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:20,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:20,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 249 [2023-08-31 03:41:20,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:20,926 INFO L130 PetriNetUnfolder]: 269/570 cut-off events. [2023-08-31 03:41:20,926 INFO L131 PetriNetUnfolder]: For 5034/5037 co-relation queries the response was YES. [2023-08-31 03:41:20,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3520 conditions, 570 events. 269/570 cut-off events. For 5034/5037 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2843 event pairs, 75 based on Foata normal form. 43/584 useless extension candidates. Maximal degree in co-relation 3474. Up to 404 conditions per place. [2023-08-31 03:41:20,931 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 111 selfloop transitions, 9 changer transitions 16/141 dead transitions. [2023-08-31 03:41:20,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 141 transitions, 1969 flow [2023-08-31 03:41:20,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:41:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:41:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 857 transitions. [2023-08-31 03:41:20,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43022088353413657 [2023-08-31 03:41:20,933 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 857 transitions. [2023-08-31 03:41:20,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 857 transitions. [2023-08-31 03:41:20,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:20,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 857 transitions. [2023-08-31 03:41:20,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.125) internal successors, (857), 8 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:20,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:20,936 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:20,936 INFO L175 Difference]: Start difference. First operand has 137 places, 200 transitions, 2392 flow. Second operand 8 states and 857 transitions. [2023-08-31 03:41:20,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 141 transitions, 1969 flow [2023-08-31 03:41:20,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 141 transitions, 1676 flow, removed 28 selfloop flow, removed 30 redundant places. [2023-08-31 03:41:20,951 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 1179 flow [2023-08-31 03:41:20,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1179, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2023-08-31 03:41:20,952 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2023-08-31 03:41:20,952 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 1179 flow [2023-08-31 03:41:20,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 103.72222222222223) internal successors, (1867), 18 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:20,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:20,953 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:20,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 03:41:21,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:21,159 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:21,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:21,159 INFO L85 PathProgramCache]: Analyzing trace with hash -569502272, now seen corresponding path program 6 times [2023-08-31 03:41:21,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:21,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332487786] [2023-08-31 03:41:21,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:21,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:41:21,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:21,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332487786] [2023-08-31 03:41:21,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332487786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:21,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553277907] [2023-08-31 03:41:21,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:41:21,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:21,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:21,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:21,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 03:41:21,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 03:41:21,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:41:21,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 03:41:21,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:21,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:21,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553277907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:21,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:21,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 18 [2023-08-31 03:41:21,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064888982] [2023-08-31 03:41:21,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:21,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 03:41:21,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:21,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 03:41:21,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:41:21,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 249 [2023-08-31 03:41:21,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 1179 flow. Second operand has 19 states, 19 states have (on average 102.42105263157895) internal successors, (1946), 19 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:21,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:21,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 249 [2023-08-31 03:41:21,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:21,934 INFO L130 PetriNetUnfolder]: 334/696 cut-off events. [2023-08-31 03:41:21,935 INFO L131 PetriNetUnfolder]: For 3397/3400 co-relation queries the response was YES. [2023-08-31 03:41:21,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3592 conditions, 696 events. 334/696 cut-off events. For 3397/3400 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3573 event pairs, 16 based on Foata normal form. 23/648 useless extension candidates. Maximal degree in co-relation 3559. Up to 278 conditions per place. [2023-08-31 03:41:21,938 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 64 selfloop transitions, 57 changer transitions 45/170 dead transitions. [2023-08-31 03:41:21,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 170 transitions, 1845 flow [2023-08-31 03:41:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 03:41:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 03:41:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1376 transitions. [2023-08-31 03:41:21,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42508495520543715 [2023-08-31 03:41:21,940 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1376 transitions. [2023-08-31 03:41:21,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1376 transitions. [2023-08-31 03:41:21,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:21,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1376 transitions. [2023-08-31 03:41:21,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 105.84615384615384) internal successors, (1376), 13 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:21,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:21,945 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:21,945 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 1179 flow. Second operand 13 states and 1376 transitions. [2023-08-31 03:41:21,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 170 transitions, 1845 flow [2023-08-31 03:41:21,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 170 transitions, 1809 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-31 03:41:21,954 INFO L231 Difference]: Finished difference. Result has 104 places, 104 transitions, 1172 flow [2023-08-31 03:41:21,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1172, PETRI_PLACES=104, PETRI_TRANSITIONS=104} [2023-08-31 03:41:21,955 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2023-08-31 03:41:21,956 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 1172 flow [2023-08-31 03:41:21,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 102.42105263157895) internal successors, (1946), 19 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:21,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:21,956 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:21,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 03:41:22,161 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,SelfDestructingSolverStorable12 [2023-08-31 03:41:22,162 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:22,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:22,162 INFO L85 PathProgramCache]: Analyzing trace with hash -423472240, now seen corresponding path program 7 times [2023-08-31 03:41:22,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:22,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447490374] [2023-08-31 03:41:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:22,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:22,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:22,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447490374] [2023-08-31 03:41:22,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447490374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:22,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347850194] [2023-08-31 03:41:22,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:41:22,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:22,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:22,930 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:22,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 03:41:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:23,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 03:41:23,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:23,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:41:23,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:41:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:41:23,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:23,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:23,462 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 144 treesize of output 112 [2023-08-31 03:41:23,470 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 99 treesize of output 87 [2023-08-31 03:41:23,473 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 87 treesize of output 75 [2023-08-31 03:41:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:41:23,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347850194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:23,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:23,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 25 [2023-08-31 03:41:23,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859145141] [2023-08-31 03:41:23,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:23,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 03:41:23,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:23,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 03:41:23,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=623, Unknown=1, NotChecked=0, Total=702 [2023-08-31 03:41:24,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-31 03:41:24,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 1172 flow. Second operand has 27 states, 27 states have (on average 70.70370370370371) internal successors, (1909), 27 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:24,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:24,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-31 03:41:24,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:25,143 INFO L130 PetriNetUnfolder]: 303/608 cut-off events. [2023-08-31 03:41:25,144 INFO L131 PetriNetUnfolder]: For 3753/3756 co-relation queries the response was YES. [2023-08-31 03:41:25,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3575 conditions, 608 events. 303/608 cut-off events. For 3753/3756 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2849 event pairs, 18 based on Foata normal form. 9/546 useless extension candidates. Maximal degree in co-relation 3542. Up to 448 conditions per place. [2023-08-31 03:41:25,148 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 88 selfloop transitions, 38 changer transitions 29/156 dead transitions. [2023-08-31 03:41:25,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 156 transitions, 1935 flow [2023-08-31 03:41:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 03:41:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 03:41:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1179 transitions. [2023-08-31 03:41:25,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29593373493975905 [2023-08-31 03:41:25,150 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1179 transitions. [2023-08-31 03:41:25,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1179 transitions. [2023-08-31 03:41:25,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:25,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1179 transitions. [2023-08-31 03:41:25,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 73.6875) internal successors, (1179), 16 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:25,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:25,155 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:25,155 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 1172 flow. Second operand 16 states and 1179 transitions. [2023-08-31 03:41:25,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 156 transitions, 1935 flow [2023-08-31 03:41:25,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 156 transitions, 1816 flow, removed 50 selfloop flow, removed 9 redundant places. [2023-08-31 03:41:25,164 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 1292 flow [2023-08-31 03:41:25,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1292, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2023-08-31 03:41:25,165 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2023-08-31 03:41:25,165 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 1292 flow [2023-08-31 03:41:25,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 70.70370370370371) internal successors, (1909), 27 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:25,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:25,166 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:25,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 03:41:25,371 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,SelfDestructingSolverStorable13 [2023-08-31 03:41:25,371 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:25,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash -468317386, now seen corresponding path program 8 times [2023-08-31 03:41:25,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:25,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795845305] [2023-08-31 03:41:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:25,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:25,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:25,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795845305] [2023-08-31 03:41:25,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795845305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:25,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136590747] [2023-08-31 03:41:25,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:41:25,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:25,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:25,697 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:25,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 03:41:25,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:41:25,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:41:25,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 03:41:25,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:26,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:26,108 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:41:26,108 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 26 treesize of output 14 [2023-08-31 03:41:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:26,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136590747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:26,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:26,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-31 03:41:26,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040007833] [2023-08-31 03:41:26,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:26,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 03:41:26,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:26,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 03:41:26,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2023-08-31 03:41:26,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 249 [2023-08-31 03:41:26,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 1292 flow. Second operand has 29 states, 29 states have (on average 95.65517241379311) internal successors, (2774), 29 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:26,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:26,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 249 [2023-08-31 03:41:26,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:28,403 INFO L130 PetriNetUnfolder]: 757/1446 cut-off events. [2023-08-31 03:41:28,404 INFO L131 PetriNetUnfolder]: For 6489/6497 co-relation queries the response was YES. [2023-08-31 03:41:28,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 1446 events. 757/1446 cut-off events. For 6489/6497 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8115 event pairs, 37 based on Foata normal form. 100/1317 useless extension candidates. Maximal degree in co-relation 7521. Up to 777 conditions per place. [2023-08-31 03:41:28,413 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 202 selfloop transitions, 189 changer transitions 1/397 dead transitions. [2023-08-31 03:41:28,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 397 transitions, 4152 flow [2023-08-31 03:41:28,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-31 03:41:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-31 03:41:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4030 transitions. [2023-08-31 03:41:28,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046184738955823 [2023-08-31 03:41:28,428 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4030 transitions. [2023-08-31 03:41:28,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4030 transitions. [2023-08-31 03:41:28,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:28,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4030 transitions. [2023-08-31 03:41:28,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 100.75) internal successors, (4030), 40 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:28,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 249.0) internal successors, (10209), 41 states have internal predecessors, (10209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:28,446 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 249.0) internal successors, (10209), 41 states have internal predecessors, (10209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:28,446 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 1292 flow. Second operand 40 states and 4030 transitions. [2023-08-31 03:41:28,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 397 transitions, 4152 flow [2023-08-31 03:41:28,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 397 transitions, 3926 flow, removed 77 selfloop flow, removed 12 redundant places. [2023-08-31 03:41:28,466 INFO L231 Difference]: Finished difference. Result has 125 places, 263 transitions, 3328 flow [2023-08-31 03:41:28,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3328, PETRI_PLACES=125, PETRI_TRANSITIONS=263} [2023-08-31 03:41:28,467 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 104 predicate places. [2023-08-31 03:41:28,467 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 263 transitions, 3328 flow [2023-08-31 03:41:28,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.65517241379311) internal successors, (2774), 29 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:28,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:28,468 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:28,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 03:41:28,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 03:41:28,675 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:28,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:28,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1087033086, now seen corresponding path program 9 times [2023-08-31 03:41:28,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:28,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777626900] [2023-08-31 03:41:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:28,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:29,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:29,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777626900] [2023-08-31 03:41:29,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777626900] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:29,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558836881] [2023-08-31 03:41:29,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:41:29,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:29,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:29,129 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:29,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 03:41:29,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:41:29,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:41:29,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-31 03:41:29,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:29,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:41:29,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-31 03:41:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:41:29,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:29,606 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_509 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_509) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2023-08-31 03:41:29,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:29,616 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 47 treesize of output 40 [2023-08-31 03:41:29,619 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 25 treesize of output 18 [2023-08-31 03:41:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-31 03:41:29,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558836881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:41:29,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:41:29,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2023-08-31 03:41:29,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084705851] [2023-08-31 03:41:29,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:41:29,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 03:41:29,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:41:29,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 03:41:29,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=443, Unknown=1, NotChecked=42, Total=552 [2023-08-31 03:41:29,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 249 [2023-08-31 03:41:29,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 263 transitions, 3328 flow. Second operand has 24 states, 24 states have (on average 81.75) internal successors, (1962), 24 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:29,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:41:29,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 249 [2023-08-31 03:41:29,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:30,662 INFO L130 PetriNetUnfolder]: 1163/2163 cut-off events. [2023-08-31 03:41:30,662 INFO L131 PetriNetUnfolder]: For 10079/10084 co-relation queries the response was YES. [2023-08-31 03:41:30,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12841 conditions, 2163 events. 1163/2163 cut-off events. For 10079/10084 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12432 event pairs, 24 based on Foata normal form. 100/1975 useless extension candidates. Maximal degree in co-relation 12804. Up to 1295 conditions per place. [2023-08-31 03:41:30,677 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 288 selfloop transitions, 200 changer transitions 2/495 dead transitions. [2023-08-31 03:41:30,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 495 transitions, 6651 flow [2023-08-31 03:41:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 03:41:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 03:41:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1801 transitions. [2023-08-31 03:41:30,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3444253203289348 [2023-08-31 03:41:30,704 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1801 transitions. [2023-08-31 03:41:30,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1801 transitions. [2023-08-31 03:41:30,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:30,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1801 transitions. [2023-08-31 03:41:30,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.76190476190476) internal successors, (1801), 21 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:30,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 249.0) internal successors, (5478), 22 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:30,712 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 249.0) internal successors, (5478), 22 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:30,713 INFO L175 Difference]: Start difference. First operand has 125 places, 263 transitions, 3328 flow. Second operand 21 states and 1801 transitions. [2023-08-31 03:41:30,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 495 transitions, 6651 flow [2023-08-31 03:41:30,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 495 transitions, 5525 flow, removed 557 selfloop flow, removed 5 redundant places. [2023-08-31 03:41:30,746 INFO L231 Difference]: Finished difference. Result has 148 places, 377 transitions, 4656 flow [2023-08-31 03:41:30,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4656, PETRI_PLACES=148, PETRI_TRANSITIONS=377} [2023-08-31 03:41:30,747 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-08-31 03:41:30,747 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 377 transitions, 4656 flow [2023-08-31 03:41:30,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 81.75) internal successors, (1962), 24 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:30,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:41:30,748 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:41:30,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-31 03:41:30,953 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,SelfDestructingSolverStorable15 [2023-08-31 03:41:30,954 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:41:30,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:41:30,954 INFO L85 PathProgramCache]: Analyzing trace with hash 812732897, now seen corresponding path program 10 times [2023-08-31 03:41:30,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:41:30,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982963085] [2023-08-31 03:41:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:41:30,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:41:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:41:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:31,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:41:31,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982963085] [2023-08-31 03:41:31,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982963085] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:41:31,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107895709] [2023-08-31 03:41:31,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:41:31,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:41:31,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:41:31,598 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:41:31,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 03:41:31,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:41:31,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:41:31,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-31 03:41:31,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:41:31,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:41:31,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:41:31,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:41:31,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:41:31,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:41:32,249 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-31 03:41:32,250 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2023-08-31 03:41:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:41:32,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:41:46,431 INFO L321 Elim1Store]: treesize reduction 104, result has 49.3 percent of original size [2023-08-31 03:41:46,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 481 treesize of output 331 [2023-08-31 03:41:46,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:46,540 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 720 treesize of output 782 [2023-08-31 03:41:46,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:46,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 639 treesize of output 620 [2023-08-31 03:41:46,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:46,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 575 treesize of output 588 [2023-08-31 03:41:46,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:46,791 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 578 treesize of output 654 [2023-08-31 03:41:46,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:46,858 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 511 treesize of output 492 [2023-08-31 03:41:46,972 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:41:46,973 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 447 treesize of output 460 [2023-08-31 03:42:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:42:36,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107895709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:42:36,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:42:36,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2023-08-31 03:42:36,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841108254] [2023-08-31 03:42:36,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:42:36,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-31 03:42:36,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:42:36,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-31 03:42:36,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1139, Unknown=9, NotChecked=0, Total=1332 [2023-08-31 03:42:39,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:42:41,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:42:43,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:42:44,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:42:46,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:42:48,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:42:50,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:42:52,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:42:54,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:42:56,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:42:58,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:00,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:02,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:04,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:06,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:08,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:10,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:12,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:14,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:16,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:18,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:20,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:23,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:25,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:43:25,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-08-31 03:43:25,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 377 transitions, 4656 flow. Second operand has 37 states, 37 states have (on average 67.56756756756756) internal successors, (2500), 37 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:43:25,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:43:25,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-08-31 03:43:25,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:43:43,475 WARN L222 SmtUtils]: Spent 17.38s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:44:09,203 WARN L222 SmtUtils]: Spent 25.57s on a formula simplification. DAG size of input: 112 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:44:45,460 WARN L222 SmtUtils]: Spent 36.00s on a formula simplification. DAG size of input: 117 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:44:47,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:44:49,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:44:52,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:44:54,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:44:56,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:44:59,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:45:01,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:45:04,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:45:06,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:45:24,727 WARN L222 SmtUtils]: Spent 17.93s on a formula simplification. DAG size of input: 136 DAG size of output: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:45:26,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:45:29,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:45:30,314 INFO L130 PetriNetUnfolder]: 1347/2518 cut-off events. [2023-08-31 03:45:30,314 INFO L131 PetriNetUnfolder]: For 12207/12208 co-relation queries the response was YES. [2023-08-31 03:45:30,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14160 conditions, 2518 events. 1347/2518 cut-off events. For 12207/12208 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15277 event pairs, 152 based on Foata normal form. 4/2372 useless extension candidates. Maximal degree in co-relation 14114. Up to 1697 conditions per place. [2023-08-31 03:45:30,334 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 423 selfloop transitions, 85 changer transitions 5/514 dead transitions. [2023-08-31 03:45:30,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 514 transitions, 6798 flow [2023-08-31 03:45:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 03:45:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 03:45:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1707 transitions. [2023-08-31 03:45:30,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2856425702811245 [2023-08-31 03:45:30,337 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1707 transitions. [2023-08-31 03:45:30,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1707 transitions. [2023-08-31 03:45:30,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:45:30,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1707 transitions. [2023-08-31 03:45:30,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 71.125) internal successors, (1707), 24 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:30,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 249.0) internal successors, (6225), 25 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:30,342 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 249.0) internal successors, (6225), 25 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:30,342 INFO L175 Difference]: Start difference. First operand has 148 places, 377 transitions, 4656 flow. Second operand 24 states and 1707 transitions. [2023-08-31 03:45:30,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 514 transitions, 6798 flow [2023-08-31 03:45:30,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 514 transitions, 6360 flow, removed 153 selfloop flow, removed 10 redundant places. [2023-08-31 03:45:30,443 INFO L231 Difference]: Finished difference. Result has 171 places, 429 transitions, 5140 flow [2023-08-31 03:45:30,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=4231, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5140, PETRI_PLACES=171, PETRI_TRANSITIONS=429} [2023-08-31 03:45:30,444 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2023-08-31 03:45:30,444 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 429 transitions, 5140 flow [2023-08-31 03:45:30,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 67.56756756756756) internal successors, (2500), 37 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:30,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:45:30,445 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:45:30,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 03:45:30,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:45:30,650 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:45:30,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:45:30,651 INFO L85 PathProgramCache]: Analyzing trace with hash 164827637, now seen corresponding path program 11 times [2023-08-31 03:45:30,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:45:30,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419652457] [2023-08-31 03:45:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:45:30,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:45:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:45:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:45:31,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:45:31,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419652457] [2023-08-31 03:45:31,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419652457] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:45:31,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305728008] [2023-08-31 03:45:31,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:45:31,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:45:31,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:45:31,412 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:45:31,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 03:45:31,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:45:31,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:45:31,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-31 03:45:31,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:45:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:45:31,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:45:32,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:45:32,324 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 68 [2023-08-31 03:45:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:45:32,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305728008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:45:32,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:45:32,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-08-31 03:45:32,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207451719] [2023-08-31 03:45:32,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:45:32,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 03:45:32,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:45:32,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 03:45:32,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2023-08-31 03:45:34,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 249 [2023-08-31 03:45:34,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 429 transitions, 5140 flow. Second operand has 35 states, 35 states have (on average 87.65714285714286) internal successors, (3068), 35 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:34,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:45:34,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 249 [2023-08-31 03:45:34,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:45:39,428 INFO L130 PetriNetUnfolder]: 1834/3463 cut-off events. [2023-08-31 03:45:39,428 INFO L131 PetriNetUnfolder]: For 16547/16547 co-relation queries the response was YES. [2023-08-31 03:45:39,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19479 conditions, 3463 events. 1834/3463 cut-off events. For 16547/16547 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 23198 event pairs, 98 based on Foata normal form. 37/3325 useless extension candidates. Maximal degree in co-relation 19424. Up to 2258 conditions per place. [2023-08-31 03:45:39,449 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 426 selfloop transitions, 275 changer transitions 32/734 dead transitions. [2023-08-31 03:45:39,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 734 transitions, 9215 flow [2023-08-31 03:45:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-31 03:45:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-31 03:45:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3932 transitions. [2023-08-31 03:45:39,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36723638741010556 [2023-08-31 03:45:39,463 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3932 transitions. [2023-08-31 03:45:39,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3932 transitions. [2023-08-31 03:45:39,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:45:39,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3932 transitions. [2023-08-31 03:45:39,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 91.44186046511628) internal successors, (3932), 43 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:39,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 249.0) internal successors, (10956), 44 states have internal predecessors, (10956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:39,472 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 249.0) internal successors, (10956), 44 states have internal predecessors, (10956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:39,472 INFO L175 Difference]: Start difference. First operand has 171 places, 429 transitions, 5140 flow. Second operand 43 states and 3932 transitions. [2023-08-31 03:45:39,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 734 transitions, 9215 flow [2023-08-31 03:45:39,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 734 transitions, 8947 flow, removed 105 selfloop flow, removed 8 redundant places. [2023-08-31 03:45:39,632 INFO L231 Difference]: Finished difference. Result has 225 places, 581 transitions, 7824 flow [2023-08-31 03:45:39,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=7824, PETRI_PLACES=225, PETRI_TRANSITIONS=581} [2023-08-31 03:45:39,632 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 204 predicate places. [2023-08-31 03:45:39,633 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 581 transitions, 7824 flow [2023-08-31 03:45:39,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 87.65714285714286) internal successors, (3068), 35 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:39,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:45:39,633 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:45:39,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-31 03:45:39,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 03:45:39,841 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:45:39,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:45:39,841 INFO L85 PathProgramCache]: Analyzing trace with hash 211530823, now seen corresponding path program 12 times [2023-08-31 03:45:39,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:45:39,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196798290] [2023-08-31 03:45:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:45:39,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:45:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:45:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:45:40,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:45:40,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196798290] [2023-08-31 03:45:40,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196798290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:45:40,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139353521] [2023-08-31 03:45:40,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:45:40,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:45:40,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:45:40,516 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:45:40,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 03:45:40,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:45:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:45:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 03:45:40,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:45:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:45:41,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:45:41,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:45:41,260 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 62 [2023-08-31 03:45:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:45:41,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139353521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:45:41,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:45:41,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2023-08-31 03:45:41,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508816736] [2023-08-31 03:45:41,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:45:41,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:45:41,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:45:41,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:45:41,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2023-08-31 03:45:43,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-31 03:45:43,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 581 transitions, 7824 flow. Second operand has 28 states, 28 states have (on average 89.71428571428571) internal successors, (2512), 28 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:43,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:45:43,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-31 03:45:43,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:45:45,940 INFO L130 PetriNetUnfolder]: 1902/3627 cut-off events. [2023-08-31 03:45:45,940 INFO L131 PetriNetUnfolder]: For 23068/23069 co-relation queries the response was YES. [2023-08-31 03:45:45,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22564 conditions, 3627 events. 1902/3627 cut-off events. For 23068/23069 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24833 event pairs, 511 based on Foata normal form. 7/3483 useless extension candidates. Maximal degree in co-relation 22489. Up to 3092 conditions per place. [2023-08-31 03:45:45,977 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 578 selfloop transitions, 119 changer transitions 32/730 dead transitions. [2023-08-31 03:45:45,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 730 transitions, 10504 flow [2023-08-31 03:45:45,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 03:45:45,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 03:45:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3437 transitions. [2023-08-31 03:45:45,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37305980679474654 [2023-08-31 03:45:45,982 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3437 transitions. [2023-08-31 03:45:45,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3437 transitions. [2023-08-31 03:45:45,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:45:45,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3437 transitions. [2023-08-31 03:45:45,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 92.89189189189189) internal successors, (3437), 37 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:45,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 249.0) internal successors, (9462), 38 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:45,993 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 249.0) internal successors, (9462), 38 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:45,993 INFO L175 Difference]: Start difference. First operand has 225 places, 581 transitions, 7824 flow. Second operand 37 states and 3437 transitions. [2023-08-31 03:45:45,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 730 transitions, 10504 flow [2023-08-31 03:45:46,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 730 transitions, 9995 flow, removed 227 selfloop flow, removed 16 redundant places. [2023-08-31 03:45:46,283 INFO L231 Difference]: Finished difference. Result has 256 places, 619 transitions, 8280 flow [2023-08-31 03:45:46,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7369, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8280, PETRI_PLACES=256, PETRI_TRANSITIONS=619} [2023-08-31 03:45:46,284 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2023-08-31 03:45:46,284 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 619 transitions, 8280 flow [2023-08-31 03:45:46,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 89.71428571428571) internal successors, (2512), 28 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:46,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:45:46,285 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:45:46,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-31 03:45:46,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:45:46,490 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:45:46,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:45:46,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1336306565, now seen corresponding path program 13 times [2023-08-31 03:45:46,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:45:46,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250141761] [2023-08-31 03:45:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:45:46,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:45:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:45:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:45:47,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:45:47,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250141761] [2023-08-31 03:45:47,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250141761] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:45:47,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662140148] [2023-08-31 03:45:47,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:45:47,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:45:47,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:45:47,485 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:45:47,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 03:45:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:45:47,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-31 03:45:47,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:45:47,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:45:47,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-31 03:45:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:45:48,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:45:48,352 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse6 c_~q~0.offset)) (.cse3 (+ .cse6 c_~q~0.offset 4))) (and (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (= .cse0 0) (< (+ c_~s~0 (select .cse1 .cse2) .cse0) (+ c_~N~0 1)))))) (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse4 (select .cse5 .cse3))) (or (= .cse4 0) (<= c_~N~0 (+ c_~s~0 (select .cse5 .cse2) .cse4))))))))) is different from false [2023-08-31 03:45:48,381 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~q_back~0 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (<= c_~n~0 c_~q_back~0) (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse6 c_~q~0.offset)) (.cse3 (+ .cse6 c_~q~0.offset 4))) (and (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (= .cse0 0) (< (+ c_~s~0 (select .cse1 .cse2) .cse0) (+ c_~N~0 1)))))) (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse4 (select .cse5 .cse3))) (or (= .cse4 0) (<= c_~N~0 (+ c_~s~0 (select .cse5 .cse2) .cse4)))))))))) is different from false [2023-08-31 03:45:48,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:45:48,524 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 168 [2023-08-31 03:45:48,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:45:48,538 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 123 treesize of output 103 [2023-08-31 03:45:48,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:45:48,547 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 103 treesize of output 83 [2023-08-31 03:45:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-31 03:45:49,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662140148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:45:49,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:45:49,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-08-31 03:45:49,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023456673] [2023-08-31 03:45:49,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:45:49,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-31 03:45:49,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:45:49,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-31 03:45:49,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1104, Unknown=3, NotChecked=138, Total=1406 [2023-08-31 03:45:49,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-31 03:45:49,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 619 transitions, 8280 flow. Second operand has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:49,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:45:49,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-31 03:45:49,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:45:53,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:45:53,367 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse10 c_~q~0.offset)) (.cse3 (+ .cse10 c_~q~0.offset 4))) (and (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (= .cse0 0) (< (+ c_~s~0 (select .cse1 .cse2) .cse0) (+ c_~N~0 1)))))) (or (and (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse4 (select .cse5 .cse3))) (or (= .cse4 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 (select .cse5 .cse2) .cse4)))))) (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse7 (select .cse6 .cse3))) (or (< (+ c_~s~0 (select .cse6 .cse2) .cse7) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|)) (= .cse7 0)))))) (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< c_~n~0 1) (< c_~n~0 (+ 2 c_~q_back~0))) (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse8 (select .cse9 .cse3))) (or (= .cse8 0) (<= c_~N~0 (+ c_~s~0 (select .cse9 .cse2) .cse8))))))))) is different from false [2023-08-31 03:45:55,238 INFO L130 PetriNetUnfolder]: 2315/4344 cut-off events. [2023-08-31 03:45:55,238 INFO L131 PetriNetUnfolder]: For 30992/30993 co-relation queries the response was YES. [2023-08-31 03:45:55,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27147 conditions, 4344 events. 2315/4344 cut-off events. For 30992/30993 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30441 event pairs, 182 based on Foata normal form. 5/4202 useless extension candidates. Maximal degree in co-relation 27061. Up to 3523 conditions per place. [2023-08-31 03:45:55,289 INFO L137 encePairwiseOnDemand]: 236/249 looper letters, 565 selfloop transitions, 320 changer transitions 6/892 dead transitions. [2023-08-31 03:45:55,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 892 transitions, 13262 flow [2023-08-31 03:45:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 03:45:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 03:45:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2143 transitions. [2023-08-31 03:45:55,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2967733000969395 [2023-08-31 03:45:55,309 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2143 transitions. [2023-08-31 03:45:55,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2143 transitions. [2023-08-31 03:45:55,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:45:55,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2143 transitions. [2023-08-31 03:45:55,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 73.89655172413794) internal successors, (2143), 29 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:55,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:55,317 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:55,330 INFO L175 Difference]: Start difference. First operand has 256 places, 619 transitions, 8280 flow. Second operand 29 states and 2143 transitions. [2023-08-31 03:45:55,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 892 transitions, 13262 flow [2023-08-31 03:45:55,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 892 transitions, 13002 flow, removed 70 selfloop flow, removed 20 redundant places. [2023-08-31 03:45:55,652 INFO L231 Difference]: Finished difference. Result has 275 places, 827 transitions, 12232 flow [2023-08-31 03:45:55,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=8067, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12232, PETRI_PLACES=275, PETRI_TRANSITIONS=827} [2023-08-31 03:45:55,653 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-08-31 03:45:55,653 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 827 transitions, 12232 flow [2023-08-31 03:45:55,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:55,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:45:55,658 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:45:55,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-31 03:45:55,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:45:55,863 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:45:55,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:45:55,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1466481873, now seen corresponding path program 14 times [2023-08-31 03:45:55,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:45:55,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138664130] [2023-08-31 03:45:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:45:55,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:45:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:45:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:45:56,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:45:56,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138664130] [2023-08-31 03:45:56,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138664130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:45:56,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616741784] [2023-08-31 03:45:56,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:45:56,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:45:56,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:45:56,527 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:45:56,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 03:45:56,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:45:56,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:45:56,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 03:45:56,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:45:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:45:56,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:45:57,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:45:57,150 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 65 [2023-08-31 03:45:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:45:57,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616741784] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:45:57,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:45:57,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 25 [2023-08-31 03:45:57,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756799647] [2023-08-31 03:45:57,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:45:57,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 03:45:57,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:45:57,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 03:45:57,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2023-08-31 03:45:58,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-31 03:45:58,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 827 transitions, 12232 flow. Second operand has 27 states, 27 states have (on average 89.88888888888889) internal successors, (2427), 27 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:45:58,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:45:58,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-31 03:45:58,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:46:01,257 INFO L130 PetriNetUnfolder]: 2372/4490 cut-off events. [2023-08-31 03:46:01,257 INFO L131 PetriNetUnfolder]: For 47817/47818 co-relation queries the response was YES. [2023-08-31 03:46:01,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33854 conditions, 4490 events. 2372/4490 cut-off events. For 47817/47818 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31799 event pairs, 539 based on Foata normal form. 14/4357 useless extension candidates. Maximal degree in co-relation 33757. Up to 4088 conditions per place. [2023-08-31 03:46:01,306 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 774 selfloop transitions, 103 changer transitions 43/921 dead transitions. [2023-08-31 03:46:01,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 921 transitions, 15176 flow [2023-08-31 03:46:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 03:46:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 03:46:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2772 transitions. [2023-08-31 03:46:01,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3710843373493976 [2023-08-31 03:46:01,310 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2772 transitions. [2023-08-31 03:46:01,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2772 transitions. [2023-08-31 03:46:01,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:46:01,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2772 transitions. [2023-08-31 03:46:01,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 92.4) internal successors, (2772), 30 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:01,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 249.0) internal successors, (7719), 31 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:01,369 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 249.0) internal successors, (7719), 31 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:01,369 INFO L175 Difference]: Start difference. First operand has 275 places, 827 transitions, 12232 flow. Second operand 30 states and 2772 transitions. [2023-08-31 03:46:01,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 921 transitions, 15176 flow [2023-08-31 03:46:01,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 921 transitions, 14953 flow, removed 88 selfloop flow, removed 10 redundant places. [2023-08-31 03:46:01,754 INFO L231 Difference]: Finished difference. Result has 304 places, 833 transitions, 12430 flow [2023-08-31 03:46:01,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=12021, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=12430, PETRI_PLACES=304, PETRI_TRANSITIONS=833} [2023-08-31 03:46:01,755 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 283 predicate places. [2023-08-31 03:46:01,755 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 833 transitions, 12430 flow [2023-08-31 03:46:01,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 89.88888888888889) internal successors, (2427), 27 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:01,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:46:01,756 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:46:01,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-31 03:46:01,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:46:01,961 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:46:01,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:46:01,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1175173119, now seen corresponding path program 15 times [2023-08-31 03:46:01,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:46:01,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607783008] [2023-08-31 03:46:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:46:01,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:46:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:46:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:46:02,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:46:02,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607783008] [2023-08-31 03:46:02,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607783008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:46:02,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856270414] [2023-08-31 03:46:02,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:46:02,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:46:02,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:46:02,809 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) [2023-08-31 03:46:02,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 03:46:03,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:46:03,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:46:03,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-31 03:46:03,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:46:03,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:46:03,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:46:03,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:46:03,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2023-08-31 03:46:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:46:03,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:46:04,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:46:04,195 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 170 [2023-08-31 03:46:04,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:46:04,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 128 [2023-08-31 03:46:04,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:46:04,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 108 [2023-08-31 03:46:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:46:04,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856270414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:46:04,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:46:04,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-31 03:46:04,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493397451] [2023-08-31 03:46:04,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:46:04,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-31 03:46:04,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:46:04,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-31 03:46:04,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1321, Unknown=4, NotChecked=0, Total=1560 [2023-08-31 03:46:05,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-31 03:46:05,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 833 transitions, 12430 flow. Second operand has 40 states, 40 states have (on average 70.45) internal successors, (2818), 40 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:05,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:46:05,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-31 03:46:05,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:46:30,931 INFO L130 PetriNetUnfolder]: 2680/5339 cut-off events. [2023-08-31 03:46:30,931 INFO L131 PetriNetUnfolder]: For 60899/60900 co-relation queries the response was YES. [2023-08-31 03:46:30,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40943 conditions, 5339 events. 2680/5339 cut-off events. For 60899/60900 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 41448 event pairs, 136 based on Foata normal form. 72/5226 useless extension candidates. Maximal degree in co-relation 40835. Up to 2584 conditions per place. [2023-08-31 03:46:31,003 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 583 selfloop transitions, 548 changer transitions 85/1217 dead transitions. [2023-08-31 03:46:31,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1217 transitions, 19676 flow [2023-08-31 03:46:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-31 03:46:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-31 03:46:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4771 transitions. [2023-08-31 03:46:31,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29938504016064255 [2023-08-31 03:46:31,009 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4771 transitions. [2023-08-31 03:46:31,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4771 transitions. [2023-08-31 03:46:31,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:46:31,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4771 transitions. [2023-08-31 03:46:31,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 74.546875) internal successors, (4771), 64 states have internal predecessors, (4771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:31,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 249.0) internal successors, (16185), 65 states have internal predecessors, (16185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:31,028 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 249.0) internal successors, (16185), 65 states have internal predecessors, (16185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:31,028 INFO L175 Difference]: Start difference. First operand has 304 places, 833 transitions, 12430 flow. Second operand 64 states and 4771 transitions. [2023-08-31 03:46:31,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1217 transitions, 19676 flow [2023-08-31 03:46:31,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1217 transitions, 19168 flow, removed 174 selfloop flow, removed 24 redundant places. [2023-08-31 03:46:31,448 INFO L231 Difference]: Finished difference. Result has 363 places, 940 transitions, 16173 flow [2023-08-31 03:46:31,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=10406, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=16173, PETRI_PLACES=363, PETRI_TRANSITIONS=940} [2023-08-31 03:46:31,449 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 342 predicate places. [2023-08-31 03:46:31,449 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 940 transitions, 16173 flow [2023-08-31 03:46:31,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 70.45) internal successors, (2818), 40 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:31,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:46:31,450 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:46:31,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 03:46:31,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:46:31,654 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:46:31,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:46:31,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1538767919, now seen corresponding path program 16 times [2023-08-31 03:46:31,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:46:31,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80313080] [2023-08-31 03:46:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:46:31,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:46:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:46:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:46:32,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:46:32,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80313080] [2023-08-31 03:46:32,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80313080] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:46:32,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196798741] [2023-08-31 03:46:32,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:46:32,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:46:32,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:46:32,558 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) [2023-08-31 03:46:32,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 03:46:32,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:46:32,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:46:32,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-31 03:46:32,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:46:33,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:46:33,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:46:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:46:33,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:46:33,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:46:33,861 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 314 treesize of output 256 [2023-08-31 03:46:33,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:46:33,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 215 treesize of output 201 [2023-08-31 03:46:33,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:46:33,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 168 [2023-08-31 03:46:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:46:34,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196798741] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:46:34,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:46:34,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-08-31 03:46:34,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201326817] [2023-08-31 03:46:34,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:46:34,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-31 03:46:34,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:46:34,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-31 03:46:34,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1193, Unknown=9, NotChecked=0, Total=1406 [2023-08-31 03:46:36,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-31 03:46:36,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 940 transitions, 16173 flow. Second operand has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:36,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:46:36,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-31 03:46:36,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:46:45,777 WARN L222 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 80 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:46:52,192 WARN L222 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 92 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:46:56,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:47:05,348 WARN L222 SmtUtils]: Spent 8.48s on a formula simplification. DAG size of input: 88 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:47:14,790 WARN L222 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 64 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:47:17,261 INFO L130 PetriNetUnfolder]: 2687/5315 cut-off events. [2023-08-31 03:47:17,262 INFO L131 PetriNetUnfolder]: For 79661/79662 co-relation queries the response was YES. [2023-08-31 03:47:17,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45354 conditions, 5315 events. 2687/5315 cut-off events. For 79661/79662 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 41064 event pairs, 193 based on Foata normal form. 9/5205 useless extension candidates. Maximal degree in co-relation 45224. Up to 3795 conditions per place. [2023-08-31 03:47:17,341 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 668 selfloop transitions, 434 changer transitions 29/1132 dead transitions. [2023-08-31 03:47:17,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1132 transitions, 21237 flow [2023-08-31 03:47:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 03:47:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 03:47:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2664 transitions. [2023-08-31 03:47:17,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2971887550200803 [2023-08-31 03:47:17,344 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2664 transitions. [2023-08-31 03:47:17,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2664 transitions. [2023-08-31 03:47:17,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:47:17,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2664 transitions. [2023-08-31 03:47:17,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 74.0) internal successors, (2664), 36 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:17,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 249.0) internal successors, (9213), 37 states have internal predecessors, (9213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:17,352 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 249.0) internal successors, (9213), 37 states have internal predecessors, (9213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:17,352 INFO L175 Difference]: Start difference. First operand has 363 places, 940 transitions, 16173 flow. Second operand 36 states and 2664 transitions. [2023-08-31 03:47:17,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1132 transitions, 21237 flow [2023-08-31 03:47:18,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1132 transitions, 19891 flow, removed 632 selfloop flow, removed 23 redundant places. [2023-08-31 03:47:18,216 INFO L231 Difference]: Finished difference. Result has 378 places, 1001 transitions, 17829 flow [2023-08-31 03:47:18,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=15141, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=17829, PETRI_PLACES=378, PETRI_TRANSITIONS=1001} [2023-08-31 03:47:18,217 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 357 predicate places. [2023-08-31 03:47:18,217 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1001 transitions, 17829 flow [2023-08-31 03:47:18,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:18,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:47:18,218 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:47:18,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 03:47:18,423 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,SelfDestructingSolverStorable22 [2023-08-31 03:47:18,424 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:47:18,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:47:18,424 INFO L85 PathProgramCache]: Analyzing trace with hash -538932787, now seen corresponding path program 17 times [2023-08-31 03:47:18,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:47:18,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315561497] [2023-08-31 03:47:18,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:47:18,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:47:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:47:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:47:19,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:47:19,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315561497] [2023-08-31 03:47:19,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315561497] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:47:19,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733790397] [2023-08-31 03:47:19,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:47:19,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:47:19,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:47:19,312 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) [2023-08-31 03:47:19,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 03:47:19,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:47:19,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:47:19,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-31 03:47:19,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:47:19,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:47:19,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:47:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:47:19,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:47:20,098 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse5 c_~q~0.offset)) (.cse3 (+ .cse5 c_~q~0.offset 4)) (.cse1 (+ c_~q~0.offset (* 4 c_~q_back~0)))) (and (forall ((v_ArrVal_825 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_825) c_~q~0.base))) (or (not (= (select .cse0 .cse1) 1)) (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 (select .cse0 .cse2) (select .cse0 .cse3)))))) (forall ((v_ArrVal_825 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_825) c_~q~0.base))) (or (< (+ c_~s~0 (select .cse4 .cse2) (select .cse4 .cse3)) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|)) (not (= (select .cse4 .cse1) 1)))))))) is different from false [2023-08-31 03:47:20,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:47:20,133 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 170 [2023-08-31 03:47:20,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:47:20,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 128 [2023-08-31 03:47:20,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:47:20,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 108 [2023-08-31 03:47:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:47:20,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733790397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:47:20,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:47:20,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 30 [2023-08-31 03:47:20,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798099038] [2023-08-31 03:47:20,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:47:20,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 03:47:20,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:47:20,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 03:47:20,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=846, Unknown=1, NotChecked=58, Total=992 [2023-08-31 03:47:20,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-31 03:47:20,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1001 transitions, 17829 flow. Second operand has 32 states, 32 states have (on average 70.65625) internal successors, (2261), 32 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:20,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:47:20,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-31 03:47:20,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:47:24,936 INFO L130 PetriNetUnfolder]: 2718/5379 cut-off events. [2023-08-31 03:47:24,936 INFO L131 PetriNetUnfolder]: For 78366/78367 co-relation queries the response was YES. [2023-08-31 03:47:24,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45767 conditions, 5379 events. 2718/5379 cut-off events. For 78366/78367 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 41675 event pairs, 340 based on Foata normal form. 10/5266 useless extension candidates. Maximal degree in co-relation 45634. Up to 4786 conditions per place. [2023-08-31 03:47:25,001 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 915 selfloop transitions, 177 changer transitions 29/1122 dead transitions. [2023-08-31 03:47:25,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 1122 transitions, 21670 flow [2023-08-31 03:47:25,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 03:47:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 03:47:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2857 transitions. [2023-08-31 03:47:25,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29420245082895685 [2023-08-31 03:47:25,004 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2857 transitions. [2023-08-31 03:47:25,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2857 transitions. [2023-08-31 03:47:25,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:47:25,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2857 transitions. [2023-08-31 03:47:25,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 73.25641025641026) internal successors, (2857), 39 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:25,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 249.0) internal successors, (9960), 40 states have internal predecessors, (9960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:25,011 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 249.0) internal successors, (9960), 40 states have internal predecessors, (9960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:25,011 INFO L175 Difference]: Start difference. First operand has 378 places, 1001 transitions, 17829 flow. Second operand 39 states and 2857 transitions. [2023-08-31 03:47:25,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 1122 transitions, 21670 flow [2023-08-31 03:47:25,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1122 transitions, 21188 flow, removed 103 selfloop flow, removed 22 redundant places. [2023-08-31 03:47:25,939 INFO L231 Difference]: Finished difference. Result has 399 places, 1029 transitions, 18411 flow [2023-08-31 03:47:25,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=17353, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=18411, PETRI_PLACES=399, PETRI_TRANSITIONS=1029} [2023-08-31 03:47:25,940 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 378 predicate places. [2023-08-31 03:47:25,941 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 1029 transitions, 18411 flow [2023-08-31 03:47:25,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 70.65625) internal successors, (2261), 32 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:25,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:47:25,941 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:47:25,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-31 03:47:26,146 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,SelfDestructingSolverStorable23 [2023-08-31 03:47:26,146 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:47:26,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:47:26,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1730663973, now seen corresponding path program 18 times [2023-08-31 03:47:26,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:47:26,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875384631] [2023-08-31 03:47:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:47:26,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:47:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:47:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:47:26,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:47:26,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875384631] [2023-08-31 03:47:26,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875384631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:47:26,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497971740] [2023-08-31 03:47:26,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:47:26,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:47:26,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:47:26,951 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) [2023-08-31 03:47:26,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 03:47:27,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:47:27,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:47:27,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-31 03:47:27,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:47:27,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:47:27,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-31 03:47:27,694 INFO L321 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-08-31 03:47:27,694 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2023-08-31 03:47:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:47:27,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:47:28,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:47:28,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 268 treesize of output 272 [2023-08-31 03:47:28,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:47:28,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 193 [2023-08-31 03:47:28,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:47:28,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 168 [2023-08-31 03:47:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:47:32,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497971740] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:47:32,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:47:32,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-31 03:47:32,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053576843] [2023-08-31 03:47:32,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:47:32,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-31 03:47:32,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:47:32,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-31 03:47:32,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1389, Unknown=1, NotChecked=0, Total=1560 [2023-08-31 03:47:34,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-31 03:47:34,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 1029 transitions, 18411 flow. Second operand has 40 states, 40 states have (on average 70.45) internal successors, (2818), 40 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:34,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:47:34,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-31 03:47:34,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:47:57,076 WARN L222 SmtUtils]: Spent 21.45s on a formula simplification. DAG size of input: 119 DAG size of output: 108 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:48:08,268 WARN L222 SmtUtils]: Spent 11.09s on a formula simplification. DAG size of input: 121 DAG size of output: 110 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:48:16,248 WARN L222 SmtUtils]: Spent 7.38s on a formula simplification. DAG size of input: 120 DAG size of output: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:48:25,708 INFO L130 PetriNetUnfolder]: 2858/5642 cut-off events. [2023-08-31 03:48:25,708 INFO L131 PetriNetUnfolder]: For 93613/93614 co-relation queries the response was YES. [2023-08-31 03:48:25,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48946 conditions, 5642 events. 2858/5642 cut-off events. For 93613/93614 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 43910 event pairs, 667 based on Foata normal form. 10/5532 useless extension candidates. Maximal degree in co-relation 48806. Up to 4964 conditions per place. [2023-08-31 03:48:25,782 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 980 selfloop transitions, 177 changer transitions 44/1202 dead transitions. [2023-08-31 03:48:25,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1202 transitions, 23073 flow [2023-08-31 03:48:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 03:48:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 03:48:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2870 transitions. [2023-08-31 03:48:25,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2955411389146329 [2023-08-31 03:48:25,785 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2870 transitions. [2023-08-31 03:48:25,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2870 transitions. [2023-08-31 03:48:25,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:25,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2870 transitions. [2023-08-31 03:48:25,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 73.58974358974359) internal successors, (2870), 39 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:25,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 249.0) internal successors, (9960), 40 states have internal predecessors, (9960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:25,792 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 249.0) internal successors, (9960), 40 states have internal predecessors, (9960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:25,793 INFO L175 Difference]: Start difference. First operand has 399 places, 1029 transitions, 18411 flow. Second operand 39 states and 2870 transitions. [2023-08-31 03:48:25,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1202 transitions, 23073 flow [2023-08-31 03:48:26,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 1202 transitions, 22703 flow, removed 126 selfloop flow, removed 15 redundant places. [2023-08-31 03:48:26,703 INFO L231 Difference]: Finished difference. Result has 436 places, 1080 transitions, 19404 flow [2023-08-31 03:48:26,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=18029, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1028, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=867, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=19404, PETRI_PLACES=436, PETRI_TRANSITIONS=1080} [2023-08-31 03:48:26,705 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 415 predicate places. [2023-08-31 03:48:26,705 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 1080 transitions, 19404 flow [2023-08-31 03:48:26,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 70.45) internal successors, (2818), 40 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:26,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:26,705 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:26,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 03:48:26,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:26,910 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:48:26,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1796296705, now seen corresponding path program 19 times [2023-08-31 03:48:26,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:26,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560479829] [2023-08-31 03:48:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:28,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:28,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560479829] [2023-08-31 03:48:28,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560479829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:28,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732099670] [2023-08-31 03:48:28,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:48:28,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:28,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:28,106 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) [2023-08-31 03:48:28,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 03:48:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:28,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-31 03:48:28,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:28,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:48:28,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2023-08-31 03:48:29,068 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-31 03:48:29,068 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2023-08-31 03:48:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:29,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:48:29,311 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~q_back~0 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (<= c_~n~0 c_~q_back~0) (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse1 (+ .cse4 c_~q~0.offset 4)) (.cse2 (+ .cse4 c_~q~0.offset))) (and (forall ((v_ArrVal_903 (Array Int Int))) (<= c_~N~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_903) c_~q~0.base))) (+ c_~s~0 (select .cse0 .cse1) (select .cse0 .cse2))))) (forall ((v_ArrVal_903 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_903) c_~q~0.base))) (+ c_~s~0 (select .cse3 .cse1) (select .cse3 .cse2))) (+ c_~N~0 1))))))) is different from false [2023-08-31 03:48:29,439 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:48:29,440 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 124 [2023-08-31 03:48:29,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:29,453 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 79 treesize of output 66 [2023-08-31 03:48:29,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:29,460 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 66 treesize of output 53 [2023-08-31 03:48:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:30,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732099670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:48:30,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:48:30,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 37 [2023-08-31 03:48:30,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634273539] [2023-08-31 03:48:30,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:48:30,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-31 03:48:30,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:30,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-31 03:48:30,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1225, Unknown=1, NotChecked=72, Total=1482 [2023-08-31 03:48:30,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-08-31 03:48:30,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1080 transitions, 19404 flow. Second operand has 39 states, 39 states have (on average 67.48717948717949) internal successors, (2632), 39 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:30,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:30,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-08-31 03:48:30,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:35,688 INFO L130 PetriNetUnfolder]: 2924/5892 cut-off events. [2023-08-31 03:48:35,689 INFO L131 PetriNetUnfolder]: For 108061/108062 co-relation queries the response was YES. [2023-08-31 03:48:35,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52551 conditions, 5892 events. 2924/5892 cut-off events. For 108061/108062 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 46791 event pairs, 217 based on Foata normal form. 226/6032 useless extension candidates. Maximal degree in co-relation 52393. Up to 2170 conditions per place. [2023-08-31 03:48:35,771 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 401 selfloop transitions, 801 changer transitions 130/1333 dead transitions. [2023-08-31 03:48:35,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1333 transitions, 26041 flow [2023-08-31 03:48:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:48:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:48:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2002 transitions. [2023-08-31 03:48:35,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28714859437751006 [2023-08-31 03:48:35,774 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2002 transitions. [2023-08-31 03:48:35,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2002 transitions. [2023-08-31 03:48:35,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:35,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2002 transitions. [2023-08-31 03:48:35,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 71.5) internal successors, (2002), 28 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:35,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 249.0) internal successors, (7221), 29 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:35,779 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 249.0) internal successors, (7221), 29 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:35,780 INFO L175 Difference]: Start difference. First operand has 436 places, 1080 transitions, 19404 flow. Second operand 28 states and 2002 transitions. [2023-08-31 03:48:35,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1333 transitions, 26041 flow [2023-08-31 03:48:36,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1333 transitions, 25287 flow, removed 343 selfloop flow, removed 19 redundant places. [2023-08-31 03:48:36,968 INFO L231 Difference]: Finished difference. Result has 445 places, 1127 transitions, 22894 flow [2023-08-31 03:48:36,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=17804, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=664, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=22894, PETRI_PLACES=445, PETRI_TRANSITIONS=1127} [2023-08-31 03:48:36,969 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 424 predicate places. [2023-08-31 03:48:36,969 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1127 transitions, 22894 flow [2023-08-31 03:48:36,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 67.48717948717949) internal successors, (2632), 39 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:36,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:36,970 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:36,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 03:48:37,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:37,177 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:48:37,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:37,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1094785749, now seen corresponding path program 20 times [2023-08-31 03:48:37,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:37,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631906175] [2023-08-31 03:48:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:37,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:38,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:38,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631906175] [2023-08-31 03:48:38,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631906175] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:38,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906272267] [2023-08-31 03:48:38,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:48:38,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:38,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:38,081 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) [2023-08-31 03:48:38,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 03:48:38,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:48:38,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:48:38,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-31 03:48:38,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:38,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:48:38,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-31 03:48:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:48:38,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:48:39,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:39,144 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 124 [2023-08-31 03:48:39,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:39,152 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 79 treesize of output 66 [2023-08-31 03:48:39,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:39,157 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 66 treesize of output 53 [2023-08-31 03:48:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:48:39,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906272267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:48:39,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:48:39,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 32 [2023-08-31 03:48:39,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756496144] [2023-08-31 03:48:39,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:48:39,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 03:48:39,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:39,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 03:48:39,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1025, Unknown=2, NotChecked=0, Total=1122 [2023-08-31 03:48:40,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-31 03:48:40,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1127 transitions, 22894 flow. Second operand has 34 states, 34 states have (on average 70.6470588235294) internal successors, (2402), 34 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:40,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:40,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-31 03:48:40,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:46,771 INFO L130 PetriNetUnfolder]: 2687/5452 cut-off events. [2023-08-31 03:48:46,771 INFO L131 PetriNetUnfolder]: For 102778/102779 co-relation queries the response was YES. [2023-08-31 03:48:46,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51818 conditions, 5452 events. 2687/5452 cut-off events. For 102778/102779 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 43203 event pairs, 191 based on Foata normal form. 6/5415 useless extension candidates. Maximal degree in co-relation 51653. Up to 4357 conditions per place. [2023-08-31 03:48:46,859 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 955 selfloop transitions, 288 changer transitions 16/1260 dead transitions. [2023-08-31 03:48:46,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 1260 transitions, 27002 flow [2023-08-31 03:48:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-31 03:48:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-31 03:48:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3246 transitions. [2023-08-31 03:48:46,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.296276013143483 [2023-08-31 03:48:46,866 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3246 transitions. [2023-08-31 03:48:46,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3246 transitions. [2023-08-31 03:48:46,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:46,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3246 transitions. [2023-08-31 03:48:46,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 73.77272727272727) internal successors, (3246), 44 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:46,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 249.0) internal successors, (11205), 45 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:46,902 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 249.0) internal successors, (11205), 45 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:46,902 INFO L175 Difference]: Start difference. First operand has 445 places, 1127 transitions, 22894 flow. Second operand 44 states and 3246 transitions. [2023-08-31 03:48:46,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 1260 transitions, 27002 flow [2023-08-31 03:48:48,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1260 transitions, 25137 flow, removed 827 selfloop flow, removed 25 redundant places. [2023-08-31 03:48:48,574 INFO L231 Difference]: Finished difference. Result has 466 places, 1141 transitions, 22114 flow [2023-08-31 03:48:48,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=20967, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=22114, PETRI_PLACES=466, PETRI_TRANSITIONS=1141} [2023-08-31 03:48:48,576 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 445 predicate places. [2023-08-31 03:48:48,576 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 1141 transitions, 22114 flow [2023-08-31 03:48:48,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 70.6470588235294) internal successors, (2402), 34 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:48,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:48,577 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:48,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 03:48:48,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 03:48:48,782 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:48:48,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:48,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1428827512, now seen corresponding path program 21 times [2023-08-31 03:48:48,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:48,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037824029] [2023-08-31 03:48:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:48,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:48:48,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:48,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037824029] [2023-08-31 03:48:48,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037824029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:48,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359290827] [2023-08-31 03:48:48,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:48:48,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:48,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:48,918 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) [2023-08-31 03:48:48,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 03:48:49,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:48:49,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:48:49,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:48:49,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:48:49,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:48:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:48:49,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359290827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:48:49,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:48:49,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 13 [2023-08-31 03:48:49,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116247415] [2023-08-31 03:48:49,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:48:49,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 03:48:49,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:49,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 03:48:49,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-08-31 03:48:49,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 249 [2023-08-31 03:48:49,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 1141 transitions, 22114 flow. Second operand has 14 states, 14 states have (on average 108.57142857142857) internal successors, (1520), 14 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:49,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:49,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 249 [2023-08-31 03:48:49,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:52,264 INFO L130 PetriNetUnfolder]: 3472/7072 cut-off events. [2023-08-31 03:48:52,265 INFO L131 PetriNetUnfolder]: For 110294/110303 co-relation queries the response was YES. [2023-08-31 03:48:52,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61676 conditions, 7072 events. 3472/7072 cut-off events. For 110294/110303 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 58667 event pairs, 249 based on Foata normal form. 170/7163 useless extension candidates. Maximal degree in co-relation 61515. Up to 2402 conditions per place. [2023-08-31 03:48:52,361 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 466 selfloop transitions, 931 changer transitions 96/1499 dead transitions. [2023-08-31 03:48:52,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 1499 transitions, 30484 flow [2023-08-31 03:48:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:48:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:48:52,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 695 transitions. [2023-08-31 03:48:52,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46519410977242304 [2023-08-31 03:48:52,362 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 695 transitions. [2023-08-31 03:48:52,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 695 transitions. [2023-08-31 03:48:52,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:52,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 695 transitions. [2023-08-31 03:48:52,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 115.83333333333333) internal successors, (695), 6 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:52,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:52,364 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:52,364 INFO L175 Difference]: Start difference. First operand has 466 places, 1141 transitions, 22114 flow. Second operand 6 states and 695 transitions. [2023-08-31 03:48:52,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 1499 transitions, 30484 flow [2023-08-31 03:48:53,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1499 transitions, 29981 flow, removed 157 selfloop flow, removed 23 redundant places. [2023-08-31 03:48:53,733 INFO L231 Difference]: Finished difference. Result has 448 places, 1371 transitions, 29416 flow [2023-08-31 03:48:53,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=20813, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1098, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=642, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=29416, PETRI_PLACES=448, PETRI_TRANSITIONS=1371} [2023-08-31 03:48:53,735 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 427 predicate places. [2023-08-31 03:48:53,735 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 1371 transitions, 29416 flow [2023-08-31 03:48:53,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 108.57142857142857) internal successors, (1520), 14 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:53,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:53,735 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:53,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-31 03:48:53,941 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,SelfDestructingSolverStorable27 [2023-08-31 03:48:53,941 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:48:53,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2001646390, now seen corresponding path program 22 times [2023-08-31 03:48:53,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:53,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97803665] [2023-08-31 03:48:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:53,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:55,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:55,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97803665] [2023-08-31 03:48:55,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97803665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:55,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680199777] [2023-08-31 03:48:55,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:48:55,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:55,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:55,398 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) [2023-08-31 03:48:55,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 03:48:55,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:48:55,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:48:55,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 03:48:55,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:48:55,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:48:56,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:56,118 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 62 [2023-08-31 03:48:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:48:56,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680199777] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:48:56,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:48:56,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 28 [2023-08-31 03:48:56,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710383195] [2023-08-31 03:48:56,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:48:56,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 03:48:56,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:56,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 03:48:56,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2023-08-31 03:48:57,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-31 03:48:57,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1371 transitions, 29416 flow. Second operand has 30 states, 30 states have (on average 89.8) internal successors, (2694), 30 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:57,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:57,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-31 03:48:57,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:01,850 INFO L130 PetriNetUnfolder]: 3269/6636 cut-off events. [2023-08-31 03:49:01,851 INFO L131 PetriNetUnfolder]: For 117764/117765 co-relation queries the response was YES. [2023-08-31 03:49:01,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65236 conditions, 6636 events. 3269/6636 cut-off events. For 117764/117765 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 53623 event pairs, 768 based on Foata normal form. 5/6572 useless extension candidates. Maximal degree in co-relation 65075. Up to 6214 conditions per place. [2023-08-31 03:49:01,944 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 1300 selfloop transitions, 103 changer transitions 65/1469 dead transitions. [2023-08-31 03:49:01,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1469 transitions, 33985 flow [2023-08-31 03:49:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 03:49:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 03:49:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2676 transitions. [2023-08-31 03:49:01,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37058579144162856 [2023-08-31 03:49:01,947 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2676 transitions. [2023-08-31 03:49:01,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2676 transitions. [2023-08-31 03:49:01,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:01,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2676 transitions. [2023-08-31 03:49:01,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 92.27586206896552) internal successors, (2676), 29 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:01,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:01,954 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:01,955 INFO L175 Difference]: Start difference. First operand has 448 places, 1371 transitions, 29416 flow. Second operand 29 states and 2676 transitions. [2023-08-31 03:49:01,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1469 transitions, 33985 flow [2023-08-31 03:49:03,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1469 transitions, 33292 flow, removed 277 selfloop flow, removed 22 redundant places. [2023-08-31 03:49:03,854 INFO L231 Difference]: Finished difference. Result has 435 places, 1371 transitions, 29115 flow [2023-08-31 03:49:03,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=28719, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=29115, PETRI_PLACES=435, PETRI_TRANSITIONS=1371} [2023-08-31 03:49:03,857 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 414 predicate places. [2023-08-31 03:49:03,857 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 1371 transitions, 29115 flow [2023-08-31 03:49:03,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 89.8) internal successors, (2694), 30 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:03,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:03,864 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:03,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-31 03:49:04,070 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,SelfDestructingSolverStorable28 [2023-08-31 03:49:04,072 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:49:04,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1295161742, now seen corresponding path program 23 times [2023-08-31 03:49:04,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:04,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069301612] [2023-08-31 03:49:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:04,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:05,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:05,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069301612] [2023-08-31 03:49:05,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069301612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:05,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766363983] [2023-08-31 03:49:05,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:49:05,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:05,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:05,602 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) [2023-08-31 03:49:05,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 03:49:05,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:49:05,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:49:05,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-31 03:49:05,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:06,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:49:06,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-31 03:49:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:49:06,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:06,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:49:06,811 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 259 treesize of output 210 [2023-08-31 03:49:06,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:49:06,823 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 165 treesize of output 139 [2023-08-31 03:49:06,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:49:06,834 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 139 treesize of output 113 [2023-08-31 03:49:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:49:07,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766363983] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:07,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:07,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2023-08-31 03:49:07,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836595966] [2023-08-31 03:49:07,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:07,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 03:49:07,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:07,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 03:49:07,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1147, Unknown=1, NotChecked=0, Total=1260 [2023-08-31 03:49:08,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-31 03:49:08,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 1371 transitions, 29115 flow. Second operand has 36 states, 36 states have (on average 70.61111111111111) internal successors, (2542), 36 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:08,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:08,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-31 03:49:08,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:13,148 INFO L130 PetriNetUnfolder]: 3220/6543 cut-off events. [2023-08-31 03:49:13,148 INFO L131 PetriNetUnfolder]: For 107570/107571 co-relation queries the response was YES. [2023-08-31 03:49:13,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62819 conditions, 6543 events. 3220/6543 cut-off events. For 107570/107571 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 53216 event pairs, 358 based on Foata normal form. 5/6479 useless extension candidates. Maximal degree in co-relation 62665. Up to 6043 conditions per place. [2023-08-31 03:49:13,272 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 1262 selfloop transitions, 140 changer transitions 44/1447 dead transitions. [2023-08-31 03:49:13,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1447 transitions, 32959 flow [2023-08-31 03:49:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 03:49:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 03:49:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1907 transitions. [2023-08-31 03:49:13,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2945628668520235 [2023-08-31 03:49:13,281 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1907 transitions. [2023-08-31 03:49:13,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1907 transitions. [2023-08-31 03:49:13,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:13,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1907 transitions. [2023-08-31 03:49:13,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.34615384615384) internal successors, (1907), 26 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:13,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:13,297 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:13,297 INFO L175 Difference]: Start difference. First operand has 435 places, 1371 transitions, 29115 flow. Second operand 26 states and 1907 transitions. [2023-08-31 03:49:13,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1447 transitions, 32959 flow [2023-08-31 03:49:15,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1447 transitions, 32704 flow, removed 63 selfloop flow, removed 15 redundant places. [2023-08-31 03:49:15,091 INFO L231 Difference]: Finished difference. Result has 440 places, 1365 transitions, 29105 flow [2023-08-31 03:49:15,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=28884, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=29105, PETRI_PLACES=440, PETRI_TRANSITIONS=1365} [2023-08-31 03:49:15,093 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 419 predicate places. [2023-08-31 03:49:15,093 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 1365 transitions, 29105 flow [2023-08-31 03:49:15,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 70.61111111111111) internal successors, (2542), 36 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:15,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:15,102 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:15,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-31 03:49:15,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:15,309 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:49:15,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:15,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1771309104, now seen corresponding path program 24 times [2023-08-31 03:49:15,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:15,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153004482] [2023-08-31 03:49:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:15,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:16,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:16,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153004482] [2023-08-31 03:49:16,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153004482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:16,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770735265] [2023-08-31 03:49:16,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:49:16,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:16,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:16,833 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) [2023-08-31 03:49:16,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 03:49:17,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:49:17,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:49:17,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-31 03:49:17,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:17,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:49:17,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 03:49:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:49:17,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:17,874 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~q_front~0 4))) (let ((.cse3 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse1 (+ .cse5 c_~q~0.offset 4)) (.cse2 (+ .cse5 c_~q~0.offset))) (and (forall ((v_ArrVal_1108 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1108) c_~q~0.base))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 (select .cse0 .cse1) (select .cse0 .cse2))) (not (= (select .cse0 .cse3) 1))))) (forall ((v_ArrVal_1108 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1108) c_~q~0.base))) (or (not (= (select .cse4 .cse3) 1)) (< (+ c_~s~0 (select .cse4 .cse1) (select .cse4 .cse2)) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|)))))))) is different from false [2023-08-31 03:49:17,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:49:17,901 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 170 [2023-08-31 03:49:17,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:49:17,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 128 [2023-08-31 03:49:17,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:49:17,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 108 [2023-08-31 03:49:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:49:18,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770735265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:18,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:18,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2023-08-31 03:49:18,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352767668] [2023-08-31 03:49:18,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:18,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 03:49:18,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 03:49:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1097, Unknown=1, NotChecked=66, Total=1260 [2023-08-31 03:49:18,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-31 03:49:18,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 1365 transitions, 29105 flow. Second operand has 36 states, 36 states have (on average 70.58333333333333) internal successors, (2541), 36 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:18,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:18,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-31 03:49:18,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:23,835 INFO L130 PetriNetUnfolder]: 3168/6409 cut-off events. [2023-08-31 03:49:23,835 INFO L131 PetriNetUnfolder]: For 107984/107985 co-relation queries the response was YES. [2023-08-31 03:49:23,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61590 conditions, 6409 events. 3168/6409 cut-off events. For 107984/107985 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 51383 event pairs, 625 based on Foata normal form. 4/6344 useless extension candidates. Maximal degree in co-relation 61434. Up to 6097 conditions per place. [2023-08-31 03:49:23,933 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 1290 selfloop transitions, 106 changer transitions 32/1429 dead transitions. [2023-08-31 03:49:23,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1429 transitions, 32864 flow [2023-08-31 03:49:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 03:49:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 03:49:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2113 transitions. [2023-08-31 03:49:23,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2926187508655311 [2023-08-31 03:49:23,937 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2113 transitions. [2023-08-31 03:49:23,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2113 transitions. [2023-08-31 03:49:23,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:23,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2113 transitions. [2023-08-31 03:49:23,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 72.86206896551724) internal successors, (2113), 29 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:23,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:23,943 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:23,943 INFO L175 Difference]: Start difference. First operand has 440 places, 1365 transitions, 29105 flow. Second operand 29 states and 2113 transitions. [2023-08-31 03:49:23,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1429 transitions, 32864 flow [2023-08-31 03:49:25,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1429 transitions, 32553 flow, removed 26 selfloop flow, removed 19 redundant places. [2023-08-31 03:49:25,482 INFO L231 Difference]: Finished difference. Result has 441 places, 1370 transitions, 29186 flow [2023-08-31 03:49:25,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=28806, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=29186, PETRI_PLACES=441, PETRI_TRANSITIONS=1370} [2023-08-31 03:49:25,484 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 420 predicate places. [2023-08-31 03:49:25,484 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1370 transitions, 29186 flow [2023-08-31 03:49:25,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 70.58333333333333) internal successors, (2541), 36 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:25,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:25,525 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:25,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-31 03:49:25,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:25,725 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:49:25,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:25,725 INFO L85 PathProgramCache]: Analyzing trace with hash 203297910, now seen corresponding path program 25 times [2023-08-31 03:49:25,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:25,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154917035] [2023-08-31 03:49:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:25,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:27,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:27,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154917035] [2023-08-31 03:49:27,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154917035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:27,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140215202] [2023-08-31 03:49:27,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:49:27,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:27,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:27,005 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) [2023-08-31 03:49:27,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 03:49:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:27,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-31 03:49:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:27,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:49:27,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-31 03:49:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:49:27,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:27,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:49:27,982 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 197 treesize of output 166 [2023-08-31 03:49:27,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:49:27,992 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 121 treesize of output 102 [2023-08-31 03:49:27,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:49:27,999 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 102 treesize of output 83 [2023-08-31 03:49:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:49:28,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140215202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:28,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:28,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2023-08-31 03:49:28,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659756139] [2023-08-31 03:49:28,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:28,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 03:49:28,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:28,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 03:49:28,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1156, Unknown=1, NotChecked=0, Total=1260 [2023-08-31 03:49:29,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-08-31 03:49:29,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1370 transitions, 29186 flow. Second operand has 36 states, 36 states have (on average 70.58333333333333) internal successors, (2541), 36 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:29,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:29,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-08-31 03:49:29,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:34,540 INFO L130 PetriNetUnfolder]: 3161/6378 cut-off events. [2023-08-31 03:49:34,541 INFO L131 PetriNetUnfolder]: For 104581/104582 co-relation queries the response was YES. [2023-08-31 03:49:34,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61193 conditions, 6378 events. 3161/6378 cut-off events. For 104581/104582 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 50910 event pairs, 411 based on Foata normal form. 3/6312 useless extension candidates. Maximal degree in co-relation 61039. Up to 5943 conditions per place. [2023-08-31 03:49:34,625 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 1245 selfloop transitions, 168 changer transitions 20/1434 dead transitions. [2023-08-31 03:49:34,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 1434 transitions, 32876 flow [2023-08-31 03:49:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 03:49:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 03:49:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1901 transitions. [2023-08-31 03:49:34,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2936360827927093 [2023-08-31 03:49:34,627 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1901 transitions. [2023-08-31 03:49:34,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1901 transitions. [2023-08-31 03:49:34,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:34,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1901 transitions. [2023-08-31 03:49:34,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.11538461538461) internal successors, (1901), 26 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:34,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:34,632 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:34,632 INFO L175 Difference]: Start difference. First operand has 441 places, 1370 transitions, 29186 flow. Second operand 26 states and 1901 transitions. [2023-08-31 03:49:34,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 1434 transitions, 32876 flow [2023-08-31 03:49:35,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1434 transitions, 32713 flow, removed 10 selfloop flow, removed 17 redundant places. [2023-08-31 03:49:36,033 INFO L231 Difference]: Finished difference. Result has 442 places, 1374 transitions, 29511 flow [2023-08-31 03:49:36,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=29019, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=29511, PETRI_PLACES=442, PETRI_TRANSITIONS=1374} [2023-08-31 03:49:36,034 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 421 predicate places. [2023-08-31 03:49:36,035 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1374 transitions, 29511 flow [2023-08-31 03:49:36,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 70.58333333333333) internal successors, (2541), 36 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:36,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:36,035 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:36,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-31 03:49:36,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:36,240 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:49:36,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:36,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2107661294, now seen corresponding path program 26 times [2023-08-31 03:49:36,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:36,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500810290] [2023-08-31 03:49:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:36,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:36,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:36,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500810290] [2023-08-31 03:49:36,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500810290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:36,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289434879] [2023-08-31 03:49:36,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:49:36,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:36,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:36,754 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:49:36,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 03:49:36,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:49:36,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:49:36,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 03:49:36,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:37,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:37,367 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:49:37,368 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 26 treesize of output 14 [2023-08-31 03:49:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:37,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289434879] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:37,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:37,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-31 03:49:37,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303813276] [2023-08-31 03:49:37,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:37,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-31 03:49:37,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:37,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-31 03:49:37,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2023-08-31 03:49:38,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 249 [2023-08-31 03:49:38,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1374 transitions, 29511 flow. Second operand has 38 states, 38 states have (on average 95.55263157894737) internal successors, (3631), 38 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:38,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:38,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 249 [2023-08-31 03:49:38,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:48,495 INFO L130 PetriNetUnfolder]: 5521/10784 cut-off events. [2023-08-31 03:49:48,496 INFO L131 PetriNetUnfolder]: For 184236/184245 co-relation queries the response was YES. [2023-08-31 03:49:48,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101462 conditions, 10784 events. 5521/10784 cut-off events. For 184236/184245 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 91326 event pairs, 218 based on Foata normal form. 301/11013 useless extension candidates. Maximal degree in co-relation 101308. Up to 3543 conditions per place. [2023-08-31 03:49:48,783 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 721 selfloop transitions, 1762 changer transitions 37/2528 dead transitions. [2023-08-31 03:49:48,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 2528 transitions, 53476 flow [2023-08-31 03:49:48,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-08-31 03:49:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-08-31 03:49:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 8311 transitions. [2023-08-31 03:49:48,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40213867518265833 [2023-08-31 03:49:48,791 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 8311 transitions. [2023-08-31 03:49:48,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 8311 transitions. [2023-08-31 03:49:48,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:48,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 8311 transitions. [2023-08-31 03:49:48,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 100.13253012048193) internal successors, (8311), 83 states have internal predecessors, (8311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 249.0) internal successors, (20916), 84 states have internal predecessors, (20916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,810 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 249.0) internal successors, (20916), 84 states have internal predecessors, (20916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,810 INFO L175 Difference]: Start difference. First operand has 442 places, 1374 transitions, 29511 flow. Second operand 83 states and 8311 transitions. [2023-08-31 03:49:48,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 2528 transitions, 53476 flow [2023-08-31 03:49:51,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 2528 transitions, 53039 flow, removed 59 selfloop flow, removed 20 redundant places. [2023-08-31 03:49:51,419 INFO L231 Difference]: Finished difference. Result has 530 places, 2102 transitions, 49702 flow [2023-08-31 03:49:51,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=28512, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=49702, PETRI_PLACES=530, PETRI_TRANSITIONS=2102} [2023-08-31 03:49:51,420 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 509 predicate places. [2023-08-31 03:49:51,420 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 2102 transitions, 49702 flow [2023-08-31 03:49:51,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 95.55263157894737) internal successors, (3631), 38 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:51,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:51,421 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:51,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-31 03:49:51,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-31 03:49:51,626 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:49:51,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:51,627 INFO L85 PathProgramCache]: Analyzing trace with hash 553864804, now seen corresponding path program 27 times [2023-08-31 03:49:51,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:51,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054617896] [2023-08-31 03:49:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:51,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:52,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:52,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054617896] [2023-08-31 03:49:52,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054617896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:52,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257217753] [2023-08-31 03:49:52,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:49:52,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:52,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:52,006 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:49:52,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 03:49:52,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:49:52,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:49:52,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 03:49:52,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-31 03:49:52,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:52,513 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 03:49:52,514 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 26 treesize of output 14 [2023-08-31 03:49:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-31 03:49:52,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257217753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:52,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:52,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2023-08-31 03:49:52,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326577605] [2023-08-31 03:49:52,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:52,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:49:52,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:52,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:49:52,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2023-08-31 03:49:53,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 249 [2023-08-31 03:49:53,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 2102 transitions, 49702 flow. Second operand has 21 states, 21 states have (on average 98.04761904761905) internal successors, (2059), 21 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:53,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:53,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 249 [2023-08-31 03:49:53,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:05,914 INFO L130 PetriNetUnfolder]: 8506/16303 cut-off events. [2023-08-31 03:50:05,914 INFO L131 PetriNetUnfolder]: For 366958/366969 co-relation queries the response was YES. [2023-08-31 03:50:06,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172424 conditions, 16303 events. 8506/16303 cut-off events. For 366958/366969 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 142027 event pairs, 409 based on Foata normal form. 898/17157 useless extension candidates. Maximal degree in co-relation 172239. Up to 6455 conditions per place. [2023-08-31 03:50:06,215 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 1405 selfloop transitions, 2082 changer transitions 55/3550 dead transitions. [2023-08-31 03:50:06,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 3550 transitions, 86949 flow [2023-08-31 03:50:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-31 03:50:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-31 03:50:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 7694 transitions. [2023-08-31 03:50:06,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.406573663073346 [2023-08-31 03:50:06,220 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 7694 transitions. [2023-08-31 03:50:06,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 7694 transitions. [2023-08-31 03:50:06,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:06,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 7694 transitions. [2023-08-31 03:50:06,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 101.23684210526316) internal successors, (7694), 76 states have internal predecessors, (7694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:06,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 249.0) internal successors, (19173), 77 states have internal predecessors, (19173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:06,234 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 249.0) internal successors, (19173), 77 states have internal predecessors, (19173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:06,235 INFO L175 Difference]: Start difference. First operand has 530 places, 2102 transitions, 49702 flow. Second operand 76 states and 7694 transitions. [2023-08-31 03:50:06,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 3550 transitions, 86949 flow [2023-08-31 03:50:14,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 3550 transitions, 80899 flow, removed 2765 selfloop flow, removed 28 redundant places. [2023-08-31 03:50:14,777 INFO L231 Difference]: Finished difference. Result has 585 places, 3043 transitions, 74713 flow [2023-08-31 03:50:14,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=43979, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=74713, PETRI_PLACES=585, PETRI_TRANSITIONS=3043} [2023-08-31 03:50:14,779 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 564 predicate places. [2023-08-31 03:50:14,779 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 3043 transitions, 74713 flow [2023-08-31 03:50:14,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.04761904761905) internal successors, (2059), 21 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:14,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:14,779 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:14,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-31 03:50:14,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:14,984 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:14,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:14,985 INFO L85 PathProgramCache]: Analyzing trace with hash -28381274, now seen corresponding path program 28 times [2023-08-31 03:50:14,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:14,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976822301] [2023-08-31 03:50:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:14,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:15,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:15,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976822301] [2023-08-31 03:50:15,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976822301] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:15,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310289782] [2023-08-31 03:50:15,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:50:15,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:15,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:15,746 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:15,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-31 03:50:15,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:50:15,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:15,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 03:50:15,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:16,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:50:16,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-31 03:50:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:50:16,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:16,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:50:16,282 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 47 treesize of output 40 [2023-08-31 03:50:16,285 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 25 treesize of output 18 [2023-08-31 03:50:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:50:16,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310289782] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:16,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:16,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 30 [2023-08-31 03:50:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359330868] [2023-08-31 03:50:16,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:16,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 03:50:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 03:50:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=848, Unknown=1, NotChecked=0, Total=930 [2023-08-31 03:50:18,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-31 03:50:18,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 3043 transitions, 74713 flow. Second operand has 31 states, 31 states have (on average 93.70967741935483) internal successors, (2905), 31 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:18,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:18,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-31 03:50:18,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:40,032 INFO L130 PetriNetUnfolder]: 10363/19541 cut-off events. [2023-08-31 03:50:40,032 INFO L131 PetriNetUnfolder]: For 497814/497825 co-relation queries the response was YES. [2023-08-31 03:50:40,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217195 conditions, 19541 events. 10363/19541 cut-off events. For 497814/497825 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 171833 event pairs, 299 based on Foata normal form. 254/19767 useless extension candidates. Maximal degree in co-relation 217005. Up to 8916 conditions per place. [2023-08-31 03:50:40,594 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 1885 selfloop transitions, 2284 changer transitions 5/4182 dead transitions. [2023-08-31 03:50:40,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 4182 transitions, 108986 flow [2023-08-31 03:50:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-31 03:50:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-31 03:50:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5339 transitions. [2023-08-31 03:50:40,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38985031033223805 [2023-08-31 03:50:40,597 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5339 transitions. [2023-08-31 03:50:40,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5339 transitions. [2023-08-31 03:50:40,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:40,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5339 transitions. [2023-08-31 03:50:40,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 97.07272727272728) internal successors, (5339), 55 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 249.0) internal successors, (13944), 56 states have internal predecessors, (13944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,608 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 249.0) internal successors, (13944), 56 states have internal predecessors, (13944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:40,608 INFO L175 Difference]: Start difference. First operand has 585 places, 3043 transitions, 74713 flow. Second operand 55 states and 5339 transitions. [2023-08-31 03:50:40,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 4182 transitions, 108986 flow [2023-08-31 03:50:52,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 4182 transitions, 99517 flow, removed 3550 selfloop flow, removed 36 redundant places. [2023-08-31 03:50:53,036 INFO L231 Difference]: Finished difference. Result has 615 places, 3705 transitions, 90685 flow [2023-08-31 03:50:53,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=67677, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1694, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=90685, PETRI_PLACES=615, PETRI_TRANSITIONS=3705} [2023-08-31 03:50:53,039 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 594 predicate places. [2023-08-31 03:50:53,039 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 3705 transitions, 90685 flow [2023-08-31 03:50:53,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 93.70967741935483) internal successors, (2905), 31 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:53,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:53,040 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:53,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:53,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:53,246 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:50:53,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:53,247 INFO L85 PathProgramCache]: Analyzing trace with hash -240532072, now seen corresponding path program 29 times [2023-08-31 03:50:53,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:53,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739871901] [2023-08-31 03:50:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:53,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:50:53,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:53,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739871901] [2023-08-31 03:50:53,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739871901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:53,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362080778] [2023-08-31 03:50:53,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:50:53,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:53,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:53,388 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:53,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-31 03:50:53,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:50:53,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:53,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:50:53,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:50:53,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:50:53,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362080778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:53,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:53,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-31 03:50:53,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340290346] [2023-08-31 03:50:53,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:53,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 03:50:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 03:50:53,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2023-08-31 03:50:54,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 249 [2023-08-31 03:50:54,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 3705 transitions, 90685 flow. Second operand has 24 states, 24 states have (on average 103.91666666666667) internal successors, (2494), 24 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:54,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:54,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 249 [2023-08-31 03:50:54,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:02,536 INFO L130 PetriNetUnfolder]: 3801/6987 cut-off events. [2023-08-31 03:51:02,536 INFO L131 PetriNetUnfolder]: For 219660/219671 co-relation queries the response was YES. [2023-08-31 03:51:02,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82939 conditions, 6987 events. 3801/6987 cut-off events. For 219660/219671 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 49664 event pairs, 1262 based on Foata normal form. 86/7059 useless extension candidates. Maximal degree in co-relation 82741. Up to 6708 conditions per place. [2023-08-31 03:51:02,677 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 1206 selfloop transitions, 5 changer transitions 98/1315 dead transitions. [2023-08-31 03:51:02,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 1315 transitions, 35141 flow [2023-08-31 03:51:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 03:51:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 03:51:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1061 transitions. [2023-08-31 03:51:02,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42610441767068274 [2023-08-31 03:51:02,680 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1061 transitions. [2023-08-31 03:51:02,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1061 transitions. [2023-08-31 03:51:02,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:51:02,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1061 transitions. [2023-08-31 03:51:02,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 106.1) internal successors, (1061), 10 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:02,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:02,682 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:02,682 INFO L175 Difference]: Start difference. First operand has 615 places, 3705 transitions, 90685 flow. Second operand 10 states and 1061 transitions. [2023-08-31 03:51:02,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 1315 transitions, 35141 flow [2023-08-31 03:51:05,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1315 transitions, 25337 flow, removed 3464 selfloop flow, removed 118 redundant places. [2023-08-31 03:51:05,562 INFO L231 Difference]: Finished difference. Result has 425 places, 1217 transitions, 21146 flow [2023-08-31 03:51:05,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=22611, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21146, PETRI_PLACES=425, PETRI_TRANSITIONS=1217} [2023-08-31 03:51:05,564 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 404 predicate places. [2023-08-31 03:51:05,564 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 1217 transitions, 21146 flow [2023-08-31 03:51:05,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 103.91666666666667) internal successors, (2494), 24 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:05,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:51:05,564 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:51:05,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-31 03:51:05,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-31 03:51:05,769 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:51:05,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:51:05,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1075414193, now seen corresponding path program 30 times [2023-08-31 03:51:05,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:51:05,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990876944] [2023-08-31 03:51:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:51:05,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:51:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:51:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:06,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:51:06,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990876944] [2023-08-31 03:51:06,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990876944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:51:06,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891868589] [2023-08-31 03:51:06,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:51:06,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:06,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:51:06,939 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:51:06,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-31 03:51:07,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:51:07,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:51:07,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-31 03:51:07,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:51:08,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:51:08,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:51:08,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:51:08,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:51:08,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:51:08,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 50 [2023-08-31 03:51:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:08,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:51:12,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:51:12,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 160 treesize of output 290 [2023-08-31 03:51:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:29,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891868589] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:51:29,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:51:29,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 44 [2023-08-31 03:51:29,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340545115] [2023-08-31 03:51:29,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:51:29,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-31 03:51:29,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:51:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-31 03:51:29,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2023-08-31 03:51:33,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 249 [2023-08-31 03:51:33,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 1217 transitions, 21146 flow. Second operand has 46 states, 46 states have (on average 87.45652173913044) internal successors, (4023), 46 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:51:33,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:51:33,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 249 [2023-08-31 03:51:33,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:40,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:51:41,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:51:43,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:51:44,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:51:46,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:51:49,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:51:51,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:51:54,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:51:57,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:51:59,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:52:05,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:52:13,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:52:15,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:52:16,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:52:17,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:52:36,899 INFO L130 PetriNetUnfolder]: 7278/13377 cut-off events. [2023-08-31 03:52:36,899 INFO L131 PetriNetUnfolder]: For 248726/248726 co-relation queries the response was YES. [2023-08-31 03:52:37,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116596 conditions, 13377 events. 7278/13377 cut-off events. For 248726/248726 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 109259 event pairs, 1119 based on Foata normal form. 64/13282 useless extension candidates. Maximal degree in co-relation 116448. Up to 7727 conditions per place. [2023-08-31 03:52:37,098 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 1622 selfloop transitions, 771 changer transitions 283/2677 dead transitions. [2023-08-31 03:52:37,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 2677 transitions, 49024 flow [2023-08-31 03:52:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-31 03:52:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-31 03:52:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 5104 transitions. [2023-08-31 03:52:37,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36603557085484795 [2023-08-31 03:52:37,110 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 5104 transitions. [2023-08-31 03:52:37,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 5104 transitions. [2023-08-31 03:52:37,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:52:37,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 5104 transitions. [2023-08-31 03:52:37,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 91.14285714285714) internal successors, (5104), 56 states have internal predecessors, (5104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:37,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 249.0) internal successors, (14193), 57 states have internal predecessors, (14193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:37,119 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 249.0) internal successors, (14193), 57 states have internal predecessors, (14193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:37,120 INFO L175 Difference]: Start difference. First operand has 425 places, 1217 transitions, 21146 flow. Second operand 56 states and 5104 transitions. [2023-08-31 03:52:37,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 2677 transitions, 49024 flow [2023-08-31 03:52:40,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 2677 transitions, 47331 flow, removed 692 selfloop flow, removed 22 redundant places. [2023-08-31 03:52:40,383 INFO L231 Difference]: Finished difference. Result has 433 places, 1951 transitions, 36158 flow [2023-08-31 03:52:40,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=20419, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=36158, PETRI_PLACES=433, PETRI_TRANSITIONS=1951} [2023-08-31 03:52:40,384 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 412 predicate places. [2023-08-31 03:52:40,384 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1951 transitions, 36158 flow [2023-08-31 03:52:40,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 87.45652173913044) internal successors, (4023), 46 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:40,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:52:40,385 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:52:40,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-31 03:52:40,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-31 03:52:40,590 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:52:40,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:52:40,591 INFO L85 PathProgramCache]: Analyzing trace with hash -882048269, now seen corresponding path program 31 times [2023-08-31 03:52:40,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:52:40,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030636314] [2023-08-31 03:52:40,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:52:40,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:52:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:52:41,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:52:41,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030636314] [2023-08-31 03:52:41,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030636314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:52:41,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110796655] [2023-08-31 03:52:41,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:52:41,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:52:41,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:52:41,818 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:52:41,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-31 03:52:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:52:41,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-31 03:52:41,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:52:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:52:42,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:52:43,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:52:43,090 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 133 treesize of output 122 [2023-08-31 03:52:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:52:43,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110796655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:52:43,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:52:43,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 34 [2023-08-31 03:52:43,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219800733] [2023-08-31 03:52:43,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:52:43,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 03:52:43,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:52:43,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 03:52:43,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2023-08-31 03:52:45,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-31 03:52:45,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1951 transitions, 36158 flow. Second operand has 36 states, 36 states have (on average 89.61111111111111) internal successors, (3226), 36 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:45,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:52:45,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-31 03:52:45,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:52:56,098 INFO L130 PetriNetUnfolder]: 7826/14516 cut-off events. [2023-08-31 03:52:56,098 INFO L131 PetriNetUnfolder]: For 309681/309681 co-relation queries the response was YES. [2023-08-31 03:52:56,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128126 conditions, 14516 events. 7826/14516 cut-off events. For 309681/309681 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 120471 event pairs, 1214 based on Foata normal form. 497/14739 useless extension candidates. Maximal degree in co-relation 127946. Up to 9010 conditions per place. [2023-08-31 03:52:56,612 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 1590 selfloop transitions, 970 changer transitions 166/2727 dead transitions. [2023-08-31 03:52:56,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 2727 transitions, 54344 flow [2023-08-31 03:52:56,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-31 03:52:56,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-31 03:52:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4283 transitions. [2023-08-31 03:52:56,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37393050462720445 [2023-08-31 03:52:56,615 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4283 transitions. [2023-08-31 03:52:56,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4283 transitions. [2023-08-31 03:52:56,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:52:56,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4283 transitions. [2023-08-31 03:52:56,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 93.1086956521739) internal successors, (4283), 46 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:56,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 249.0) internal successors, (11703), 47 states have internal predecessors, (11703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:56,624 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 249.0) internal successors, (11703), 47 states have internal predecessors, (11703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:52:56,624 INFO L175 Difference]: Start difference. First operand has 433 places, 1951 transitions, 36158 flow. Second operand 46 states and 4283 transitions. [2023-08-31 03:52:56,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 2727 transitions, 54344 flow [2023-08-31 03:53:01,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 2727 transitions, 52619 flow, removed 836 selfloop flow, removed 23 redundant places. [2023-08-31 03:53:01,771 INFO L231 Difference]: Finished difference. Result has 468 places, 2376 transitions, 46715 flow [2023-08-31 03:53:01,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=33943, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=46715, PETRI_PLACES=468, PETRI_TRANSITIONS=2376} [2023-08-31 03:53:01,772 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 447 predicate places. [2023-08-31 03:53:01,772 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 2376 transitions, 46715 flow [2023-08-31 03:53:01,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 89.61111111111111) internal successors, (3226), 36 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:53:01,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:53:01,773 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:53:01,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-31 03:53:01,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-31 03:53:01,975 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:53:01,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:53:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1643787679, now seen corresponding path program 32 times [2023-08-31 03:53:01,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:53:01,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350065438] [2023-08-31 03:53:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:53:01,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:53:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:53:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:53:03,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:53:03,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350065438] [2023-08-31 03:53:03,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350065438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:53:03,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010725688] [2023-08-31 03:53:03,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:53:03,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:53:03,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:53:03,463 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:53:03,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-31 03:53:03,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:53:03,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:53:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 101 conjunts are in the unsatisfiable core [2023-08-31 03:53:03,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:53:03,757 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 11 treesize of output 7 [2023-08-31 03:53:03,811 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 11 treesize of output 7 [2023-08-31 03:53:03,870 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 11 treesize of output 7 [2023-08-31 03:53:03,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:53:03,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:53:04,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:53:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:53:04,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:53:04,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:53:04,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 42 [2023-08-31 03:53:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:53:04,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:53:07,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:53:07,585 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 3 case distinctions, treesize of input 320 treesize of output 162 [2023-08-31 03:53:07,660 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-31 03:53:07,661 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 913 treesize of output 879 [2023-08-31 03:53:07,688 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:53:07,689 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:53:07,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:53:07,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 274 treesize of output 313 [2023-08-31 03:53:07,820 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-31 03:53:07,820 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 277 treesize of output 271 [2023-08-31 03:53:22,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:53:22,140 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 3 case distinctions, treesize of input 320 treesize of output 162 [2023-08-31 03:53:22,208 INFO L321 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2023-08-31 03:53:22,209 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 431 treesize of output 384 [2023-08-31 03:53:22,266 INFO L321 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2023-08-31 03:53:22,266 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 372 treesize of output 294 [2023-08-31 03:53:22,326 INFO L321 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2023-08-31 03:53:22,326 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 232 treesize of output 199 [2023-08-31 03:53:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:53:22,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010725688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:53:22,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:53:22,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2023-08-31 03:53:22,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500853657] [2023-08-31 03:53:22,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:53:22,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-31 03:53:22,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:53:22,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-31 03:53:23,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1984, Unknown=6, NotChecked=0, Total=2352 [2023-08-31 03:53:24,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-08-31 03:53:24,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 2376 transitions, 46715 flow. Second operand has 49 states, 49 states have (on average 67.36734693877551) internal successors, (3301), 49 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:53:24,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:53:24,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-08-31 03:53:24,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:53:40,988 WARN L222 SmtUtils]: Spent 11.91s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:53:48,020 WARN L222 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 87 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:53:50,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:53:52,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:53:54,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:53:56,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:03,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:05,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:07,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:09,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:13,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:25,558 WARN L222 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 112 DAG size of output: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:54:34,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:36,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:38,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:43,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:46,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:49,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15