./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-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 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 21:55:10,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:55:10,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:55:10,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:55:10,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:55:10,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:55:10,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:55:10,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:55:10,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:55:10,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:55:10,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:55:10,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:55:10,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:55:10,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:55:10,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:55:10,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:55:10,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:55:10,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:55:10,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:55:10,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:55:10,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:55:10,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:55:10,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:55:10,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:55:10,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:55:10,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:55:10,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:55:10,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:55:10,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:55:10,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:55:10,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:55:10,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:55:10,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:55:10,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:55:10,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:55:10,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:55:10,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:55:10,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:55:10,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:55:10,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:55:10,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:55:10,884 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:55:10,917 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:55:10,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:55:10,918 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:55:10,918 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:55:10,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:55:10,919 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:55:10,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:55:10,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:55:10,920 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:55:10,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:55:10,921 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:55:10,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:55:10,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:55:10,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:55:10,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:55:10,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:55:10,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:55:10,922 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:55:10,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:55:10,923 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:55:10,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:55:10,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:55:10,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:55:10,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:55:10,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:55:10,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:55:10,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:55:10,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:55:10,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:55:10,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:55:10,925 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:55:10,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:55:10,925 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:55:10,925 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:55:10,925 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:55:10,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:55:11,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:55:11,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:55:11,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:55:11,238 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:55:11,238 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:55:11,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2023-08-30 21:55:12,505 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:55:12,720 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:55:12,721 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2023-08-30 21:55:12,726 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fb79fa5b/50704d71acd44ec59fbeb902d2e768e4/FLAGa2119a0ee [2023-08-30 21:55:12,737 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fb79fa5b/50704d71acd44ec59fbeb902d2e768e4 [2023-08-30 21:55:12,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:55:12,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:55:12,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:55:12,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:55:12,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:55:12,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:12,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc62bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12, skipping insertion in model container [2023-08-30 21:55:12,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:12,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:55:12,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:55:12,903 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/unroll-cond-2.wvr.c[2474,2487] [2023-08-30 21:55:12,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:55:12,917 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:55:12,933 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/unroll-cond-2.wvr.c[2474,2487] [2023-08-30 21:55:12,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:55:12,948 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:55:12,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12 WrapperNode [2023-08-30 21:55:12,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:55:12,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:55:12,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:55:12,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:55:12,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:12,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:13,010 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 144 [2023-08-30 21:55:13,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:55:13,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:55:13,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:55:13,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:55:13,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:13,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:13,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:13,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:13,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:13,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:13,057 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:13,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:13,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:55:13,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:55:13,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:55:13,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:55:13,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12" (1/1) ... [2023-08-30 21:55:13,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:55:13,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:13,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 21:55:13,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 21:55:13,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:55:13,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:55:13,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:55:13,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:55:13,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:55:13,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:55:13,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:55:13,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:55:13,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 21:55:13,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:55:13,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:55:13,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:55:13,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:55:13,145 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 21:55:13,281 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:55:13,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:55:13,527 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:55:13,538 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:55:13,541 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 21:55:13,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:55:13 BoogieIcfgContainer [2023-08-30 21:55:13,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:55:13,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:55:13,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:55:13,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:55:13,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:55:12" (1/3) ... [2023-08-30 21:55:13,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca9fbaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:55:13, skipping insertion in model container [2023-08-30 21:55:13,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:55:12" (2/3) ... [2023-08-30 21:55:13,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca9fbaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:55:13, skipping insertion in model container [2023-08-30 21:55:13,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:55:13" (3/3) ... [2023-08-30 21:55:13,552 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2023-08-30 21:55:13,559 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:55:13,567 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:55:13,568 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:55:13,568 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:55:13,678 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 21:55:13,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 166 transitions, 348 flow [2023-08-30 21:55:13,782 INFO L130 PetriNetUnfolder]: 15/164 cut-off events. [2023-08-30 21:55:13,783 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:55:13,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 164 events. 15/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 205 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-08-30 21:55:13,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 166 transitions, 348 flow [2023-08-30 21:55:13,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 156 transitions, 324 flow [2023-08-30 21:55:13,797 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:55:13,806 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 156 transitions, 324 flow [2023-08-30 21:55:13,808 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 156 transitions, 324 flow [2023-08-30 21:55:13,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 156 transitions, 324 flow [2023-08-30 21:55:13,851 INFO L130 PetriNetUnfolder]: 15/156 cut-off events. [2023-08-30 21:55:13,851 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:55:13,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 15/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 203 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-08-30 21:55:13,854 INFO L119 LiptonReduction]: Number of co-enabled transitions 2692 [2023-08-30 21:55:18,332 INFO L134 LiptonReduction]: Checked pairs total: 2696 [2023-08-30 21:55:18,333 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-08-30 21:55:18,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:55:18,350 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;@252dcd09, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:55:18,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 21:55:18,355 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-30 21:55:18,356 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:55:18,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:18,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:18,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:18,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:18,361 INFO L85 PathProgramCache]: Analyzing trace with hash -526169532, now seen corresponding path program 1 times [2023-08-30 21:55:18,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:18,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240247776] [2023-08-30 21:55:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:18,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:55:18,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:18,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240247776] [2023-08-30 21:55:18,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240247776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:55:18,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:55:18,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 21:55:18,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580193571] [2023-08-30 21:55:18,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:55:18,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:55:18,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:18,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:55:18,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:55:18,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 347 [2023-08-30 21:55:18,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:18,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:18,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 347 [2023-08-30 21:55:18,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:18,863 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-08-30 21:55:18,863 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 21:55:18,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-08-30 21:55:18,865 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-30 21:55:18,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-30 21:55:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:55:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:55:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-08-30 21:55:18,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43707973102785785 [2023-08-30 21:55:18,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-08-30 21:55:18,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-08-30 21:55:18,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:18,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-08-30 21:55:18,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:18,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:18,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:18,894 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 455 transitions. [2023-08-30 21:55:18,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-30 21:55:18,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 21:55:18,898 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-30 21:55:18,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, 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=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-30 21:55:18,902 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-30 21:55:18,902 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-30 21:55:18,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:18,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:18,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:18,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:55:18,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:18,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:18,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1480683613, now seen corresponding path program 1 times [2023-08-30 21:55:18,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:18,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793693770] [2023-08-30 21:55:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:18,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:19,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:19,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793693770] [2023-08-30 21:55:19,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793693770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:55:19,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:55:19,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:55:19,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560048843] [2023-08-30 21:55:19,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:55:19,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:55:19,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:19,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:55:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:55:19,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2023-08-30 21:55:19,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:19,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:19,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2023-08-30 21:55:19,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:19,497 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2023-08-30 21:55:19,497 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:55:19,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 363 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-08-30 21:55:19,498 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-30 21:55:19,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-08-30 21:55:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:55:19,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:55:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 730 transitions. [2023-08-30 21:55:19,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4207492795389049 [2023-08-30 21:55:19,503 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 730 transitions. [2023-08-30 21:55:19,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 730 transitions. [2023-08-30 21:55:19,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:19,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 730 transitions. [2023-08-30 21:55:19,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:19,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:19,514 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:19,514 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 730 transitions. [2023-08-30 21:55:19,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-08-30 21:55:19,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 21:55:19,516 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-08-30 21:55:19,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-08-30 21:55:19,517 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-30 21:55:19,518 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-08-30 21:55:19,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:19,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:19,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:19,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:55:19,519 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:19,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:19,521 INFO L85 PathProgramCache]: Analyzing trace with hash 182747709, now seen corresponding path program 2 times [2023-08-30 21:55:19,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:19,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506514265] [2023-08-30 21:55:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:19,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:19,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:19,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506514265] [2023-08-30 21:55:19,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506514265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:55:19,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:55:19,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:55:19,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148241007] [2023-08-30 21:55:19,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:55:19,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:55:19,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:55:19,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:55:19,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2023-08-30 21:55:19,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:19,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:19,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2023-08-30 21:55:19,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:19,935 INFO L130 PetriNetUnfolder]: 109/198 cut-off events. [2023-08-30 21:55:19,935 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-08-30 21:55:19,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 198 events. 109/198 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 606 event pairs, 24 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 560. Up to 87 conditions per place. [2023-08-30 21:55:19,940 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 40 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2023-08-30 21:55:19,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 292 flow [2023-08-30 21:55:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:55:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:55:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2023-08-30 21:55:19,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4207492795389049 [2023-08-30 21:55:19,944 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2023-08-30 21:55:19,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2023-08-30 21:55:19,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:19,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2023-08-30 21:55:19,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:19,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:19,951 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:19,952 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 6 states and 876 transitions. [2023-08-30 21:55:19,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 292 flow [2023-08-30 21:55:19,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 275 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 21:55:19,956 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 163 flow [2023-08-30 21:55:19,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, 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=6, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-30 21:55:19,958 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-08-30 21:55:19,961 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 163 flow [2023-08-30 21:55:19,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:19,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:19,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:19,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:55:19,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:19,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1504917559, now seen corresponding path program 3 times [2023-08-30 21:55:19,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:19,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853983340] [2023-08-30 21:55:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:19,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:20,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:20,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853983340] [2023-08-30 21:55:20,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853983340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:55:20,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:55:20,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:55:20,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349281790] [2023-08-30 21:55:20,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:55:20,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:55:20,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:55:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:55:20,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 347 [2023-08-30 21:55:20,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:20,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 347 [2023-08-30 21:55:20,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:20,300 INFO L130 PetriNetUnfolder]: 119/214 cut-off events. [2023-08-30 21:55:20,300 INFO L131 PetriNetUnfolder]: For 343/343 co-relation queries the response was YES. [2023-08-30 21:55:20,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 214 events. 119/214 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 686 event pairs, 28 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 778. Up to 111 conditions per place. [2023-08-30 21:55:20,302 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 40 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-08-30 21:55:20,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 376 flow [2023-08-30 21:55:20,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:55:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:55:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 726 transitions. [2023-08-30 21:55:20,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41844380403458215 [2023-08-30 21:55:20,308 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 726 transitions. [2023-08-30 21:55:20,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 726 transitions. [2023-08-30 21:55:20,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:20,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 726 transitions. [2023-08-30 21:55:20,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,319 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,320 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 163 flow. Second operand 5 states and 726 transitions. [2023-08-30 21:55:20,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 376 flow [2023-08-30 21:55:20,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 362 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-30 21:55:20,327 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 255 flow [2023-08-30 21:55:20,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-30 21:55:20,329 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-08-30 21:55:20,329 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 255 flow [2023-08-30 21:55:20,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:20,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:20,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 21:55:20,330 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:20,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:20,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1764589935, now seen corresponding path program 4 times [2023-08-30 21:55:20,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:20,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582244586] [2023-08-30 21:55:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:20,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:20,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:20,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582244586] [2023-08-30 21:55:20,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582244586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:55:20,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:55:20,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:55:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121064656] [2023-08-30 21:55:20,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:55:20,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:55:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:55:20,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:55:20,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 347 [2023-08-30 21:55:20,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:20,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 347 [2023-08-30 21:55:20,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:20,640 INFO L130 PetriNetUnfolder]: 115/210 cut-off events. [2023-08-30 21:55:20,640 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-08-30 21:55:20,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 210 events. 115/210 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 663 event pairs, 36 based on Foata normal form. 4/189 useless extension candidates. Maximal degree in co-relation 848. Up to 167 conditions per place. [2023-08-30 21:55:20,642 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 33 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-08-30 21:55:20,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 430 flow [2023-08-30 21:55:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:55:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:55:20,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 720 transitions. [2023-08-30 21:55:20,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414985590778098 [2023-08-30 21:55:20,645 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 720 transitions. [2023-08-30 21:55:20,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 720 transitions. [2023-08-30 21:55:20,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:20,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 720 transitions. [2023-08-30 21:55:20,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,651 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,651 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 255 flow. Second operand 5 states and 720 transitions. [2023-08-30 21:55:20,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 430 flow [2023-08-30 21:55:20,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 414 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 21:55:20,655 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 347 flow [2023-08-30 21:55:20,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-30 21:55:20,656 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-08-30 21:55:20,656 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 347 flow [2023-08-30 21:55:20,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:20,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:20,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 21:55:20,657 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:20,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:20,658 INFO L85 PathProgramCache]: Analyzing trace with hash -467573743, now seen corresponding path program 5 times [2023-08-30 21:55:20,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:20,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511497544] [2023-08-30 21:55:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:20,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:20,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511497544] [2023-08-30 21:55:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511497544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:55:20,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:55:20,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:55:20,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569110794] [2023-08-30 21:55:20,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:55:20,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:55:20,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:20,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:55:20,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:55:20,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2023-08-30 21:55:20,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:20,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2023-08-30 21:55:20,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:20,952 INFO L130 PetriNetUnfolder]: 116/213 cut-off events. [2023-08-30 21:55:20,952 INFO L131 PetriNetUnfolder]: For 617/617 co-relation queries the response was YES. [2023-08-30 21:55:20,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 213 events. 116/213 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 695 event pairs, 24 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 920. Up to 113 conditions per place. [2023-08-30 21:55:20,954 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 41 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2023-08-30 21:55:20,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 503 flow [2023-08-30 21:55:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:55:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:55:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 729 transitions. [2023-08-30 21:55:20,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201729106628242 [2023-08-30 21:55:20,957 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 729 transitions. [2023-08-30 21:55:20,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 729 transitions. [2023-08-30 21:55:20,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:20,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 729 transitions. [2023-08-30 21:55:20,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,963 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,963 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 347 flow. Second operand 5 states and 729 transitions. [2023-08-30 21:55:20,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 503 flow [2023-08-30 21:55:20,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 460 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-30 21:55:20,968 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 344 flow [2023-08-30 21:55:20,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-08-30 21:55:20,969 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-08-30 21:55:20,969 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 344 flow [2023-08-30 21:55:20,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:20,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:20,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:20,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 21:55:20,970 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:20,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:20,970 INFO L85 PathProgramCache]: Analyzing trace with hash -263674133, now seen corresponding path program 6 times [2023-08-30 21:55:20,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:20,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657421373] [2023-08-30 21:55:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:20,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:21,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:21,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657421373] [2023-08-30 21:55:21,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657421373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:55:21,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:55:21,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:55:21,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375765282] [2023-08-30 21:55:21,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:55:21,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:55:21,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:21,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:55:21,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:55:21,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2023-08-30 21:55:21,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:21,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:21,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2023-08-30 21:55:21,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:21,264 INFO L130 PetriNetUnfolder]: 115/206 cut-off events. [2023-08-30 21:55:21,265 INFO L131 PetriNetUnfolder]: For 770/770 co-relation queries the response was YES. [2023-08-30 21:55:21,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 206 events. 115/206 cut-off events. For 770/770 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 627 event pairs, 35 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 884. Up to 160 conditions per place. [2023-08-30 21:55:21,267 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 34 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2023-08-30 21:55:21,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 472 flow [2023-08-30 21:55:21,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:55:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:55:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 725 transitions. [2023-08-30 21:55:21,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41786743515850144 [2023-08-30 21:55:21,270 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 725 transitions. [2023-08-30 21:55:21,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 725 transitions. [2023-08-30 21:55:21,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:21,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 725 transitions. [2023-08-30 21:55:21,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:21,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:21,275 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:21,275 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 344 flow. Second operand 5 states and 725 transitions. [2023-08-30 21:55:21,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 472 flow [2023-08-30 21:55:21,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 438 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 21:55:21,280 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 350 flow [2023-08-30 21:55:21,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-30 21:55:21,281 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-08-30 21:55:21,281 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 350 flow [2023-08-30 21:55:21,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:21,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:21,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:21,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 21:55:21,282 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:21,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1171572305, now seen corresponding path program 1 times [2023-08-30 21:55:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:21,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401020491] [2023-08-30 21:55:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:21,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:21,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:21,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401020491] [2023-08-30 21:55:21,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401020491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:55:21,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996044252] [2023-08-30 21:55:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:21,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:21,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:21,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:55:21,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 21:55:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:21,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 21:55:21,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:55:22,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-30 21:55:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:22,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:55:22,630 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:55:22,630 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 19 treesize of output 7 [2023-08-30 21:55:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:22,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996044252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:55:22,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:55:22,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-08-30 21:55:22,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042575605] [2023-08-30 21:55:22,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:55:22,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:55:22,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:22,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:55:22,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:55:23,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 347 [2023-08-30 21:55:23,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 350 flow. Second operand has 12 states, 12 states have (on average 127.33333333333333) internal successors, (1528), 12 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:23,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:23,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 347 [2023-08-30 21:55:23,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:23,636 INFO L130 PetriNetUnfolder]: 236/417 cut-off events. [2023-08-30 21:55:23,637 INFO L131 PetriNetUnfolder]: For 1346/1346 co-relation queries the response was YES. [2023-08-30 21:55:23,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1749 conditions, 417 events. 236/417 cut-off events. For 1346/1346 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1633 event pairs, 10 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 1719. Up to 113 conditions per place. [2023-08-30 21:55:23,640 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 68 selfloop transitions, 53 changer transitions 4/125 dead transitions. [2023-08-30 21:55:23,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 125 transitions, 995 flow [2023-08-30 21:55:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 21:55:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 21:55:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1727 transitions. [2023-08-30 21:55:23,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38284194191975174 [2023-08-30 21:55:23,646 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1727 transitions. [2023-08-30 21:55:23,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1727 transitions. [2023-08-30 21:55:23,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:23,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1727 transitions. [2023-08-30 21:55:23,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 132.84615384615384) internal successors, (1727), 13 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:23,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:23,658 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:23,658 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 350 flow. Second operand 13 states and 1727 transitions. [2023-08-30 21:55:23,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 125 transitions, 995 flow [2023-08-30 21:55:23,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 125 transitions, 933 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 21:55:23,665 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 676 flow [2023-08-30 21:55:23,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=676, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2023-08-30 21:55:23,666 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 45 predicate places. [2023-08-30 21:55:23,666 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 676 flow [2023-08-30 21:55:23,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 127.33333333333333) internal successors, (1528), 12 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:23,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:23,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:23,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 21:55:23,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:23,885 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:23,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:23,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1460222474, now seen corresponding path program 1 times [2023-08-30 21:55:23,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:23,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118099453] [2023-08-30 21:55:23,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:23,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:24,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118099453] [2023-08-30 21:55:24,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118099453] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:55:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232642780] [2023-08-30 21:55:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:24,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:24,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:24,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:55:24,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 21:55:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:24,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 21:55:24,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:55:24,776 INFO L321 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-08-30 21:55:24,777 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 115 [2023-08-30 21:55:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:55:24,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:55:25,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:55:25,200 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 74 [2023-08-30 21:55:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:55:25,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232642780] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:55:25,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:55:25,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 21 [2023-08-30 21:55:25,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238426863] [2023-08-30 21:55:25,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:55:25,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 21:55:25,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 21:55:25,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-08-30 21:55:26,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 347 [2023-08-30 21:55:26,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 676 flow. Second operand has 21 states, 21 states have (on average 113.28571428571429) internal successors, (2379), 21 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:26,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:26,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 347 [2023-08-30 21:55:26,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:27,749 INFO L130 PetriNetUnfolder]: 375/684 cut-off events. [2023-08-30 21:55:27,750 INFO L131 PetriNetUnfolder]: For 2569/2569 co-relation queries the response was YES. [2023-08-30 21:55:27,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3230 conditions, 684 events. 375/684 cut-off events. For 2569/2569 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3166 event pairs, 37 based on Foata normal form. 5/631 useless extension candidates. Maximal degree in co-relation 3069. Up to 232 conditions per place. [2023-08-30 21:55:27,755 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 76 selfloop transitions, 56 changer transitions 56/188 dead transitions. [2023-08-30 21:55:27,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 188 transitions, 1790 flow [2023-08-30 21:55:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 21:55:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 21:55:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2576 transitions. [2023-08-30 21:55:27,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3374377783599686 [2023-08-30 21:55:27,764 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2576 transitions. [2023-08-30 21:55:27,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2576 transitions. [2023-08-30 21:55:27,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:27,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2576 transitions. [2023-08-30 21:55:27,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 117.0909090909091) internal successors, (2576), 22 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:27,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 347.0) internal successors, (7981), 23 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:27,781 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 347.0) internal successors, (7981), 23 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:27,781 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 676 flow. Second operand 22 states and 2576 transitions. [2023-08-30 21:55:27,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 188 transitions, 1790 flow [2023-08-30 21:55:27,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 188 transitions, 1618 flow, removed 68 selfloop flow, removed 2 redundant places. [2023-08-30 21:55:27,802 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 924 flow [2023-08-30 21:55:27,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=924, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2023-08-30 21:55:27,803 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-08-30 21:55:27,803 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 924 flow [2023-08-30 21:55:27,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 113.28571428571429) internal successors, (2379), 21 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:27,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:27,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:27,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 21:55:28,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-30 21:55:28,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:28,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash -990791569, now seen corresponding path program 2 times [2023-08-30 21:55:28,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:28,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760662247] [2023-08-30 21:55:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:28,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:28,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:28,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760662247] [2023-08-30 21:55:28,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760662247] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:55:28,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572608107] [2023-08-30 21:55:28,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:55:28,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:28,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:28,347 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:55:28,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 21:55:28,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:55:28,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:55:28,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 21:55:28,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:55:28,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-30 21:55:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:28,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:55:28,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:55:28,985 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 68 treesize of output 53 [2023-08-30 21:55:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:29,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572608107] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:55:29,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:55:29,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-08-30 21:55:29,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125555343] [2023-08-30 21:55:29,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:55:29,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:55:29,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:29,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:55:29,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:55:29,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 347 [2023-08-30 21:55:29,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 924 flow. Second operand has 12 states, 12 states have (on average 128.5) internal successors, (1542), 12 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:29,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:29,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 347 [2023-08-30 21:55:29,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:30,113 INFO L130 PetriNetUnfolder]: 323/577 cut-off events. [2023-08-30 21:55:30,114 INFO L131 PetriNetUnfolder]: For 2303/2303 co-relation queries the response was YES. [2023-08-30 21:55:30,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2739 conditions, 577 events. 323/577 cut-off events. For 2303/2303 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2495 event pairs, 5 based on Foata normal form. 2/577 useless extension candidates. Maximal degree in co-relation 2679. Up to 239 conditions per place. [2023-08-30 21:55:30,119 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 69 selfloop transitions, 74 changer transitions 4/147 dead transitions. [2023-08-30 21:55:30,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1488 flow [2023-08-30 21:55:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 21:55:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 21:55:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1729 transitions. [2023-08-30 21:55:30,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38328530259365995 [2023-08-30 21:55:30,124 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1729 transitions. [2023-08-30 21:55:30,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1729 transitions. [2023-08-30 21:55:30,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:30,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1729 transitions. [2023-08-30 21:55:30,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 133.0) internal successors, (1729), 13 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:30,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:30,136 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:30,136 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 924 flow. Second operand 13 states and 1729 transitions. [2023-08-30 21:55:30,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1488 flow [2023-08-30 21:55:30,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 147 transitions, 1364 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-08-30 21:55:30,151 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 1211 flow [2023-08-30 21:55:30,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1211, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2023-08-30 21:55:30,152 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-08-30 21:55:30,152 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 1211 flow [2023-08-30 21:55:30,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 128.5) internal successors, (1542), 12 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:30,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:30,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:30,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 21:55:30,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:30,360 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:30,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:30,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1059349345, now seen corresponding path program 3 times [2023-08-30 21:55:30,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:30,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586632251] [2023-08-30 21:55:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:30,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:30,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:30,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586632251] [2023-08-30 21:55:30,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586632251] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:55:30,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512463518] [2023-08-30 21:55:30,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:55:30,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:30,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:30,622 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:55:30,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 21:55:30,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:55:30,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:55:30,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 21:55:30,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:55:30,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 21:55:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:30,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:55:31,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:55:31,088 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 136 treesize of output 128 [2023-08-30 21:55:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512463518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:55:31,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:55:31,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-08-30 21:55:31,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9048740] [2023-08-30 21:55:31,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:55:31,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 21:55:31,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:31,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 21:55:31,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-08-30 21:55:31,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 347 [2023-08-30 21:55:31,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 1211 flow. Second operand has 14 states, 14 states have (on average 128.21428571428572) internal successors, (1795), 14 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:31,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:31,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 347 [2023-08-30 21:55:31,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:32,003 INFO L130 PetriNetUnfolder]: 389/752 cut-off events. [2023-08-30 21:55:32,003 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-30 21:55:32,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3652 conditions, 752 events. 389/752 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3828 event pairs, 4 based on Foata normal form. 2/753 useless extension candidates. Maximal degree in co-relation 3548. Up to 216 conditions per place. [2023-08-30 21:55:32,010 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 82 selfloop transitions, 102 changer transitions 20/204 dead transitions. [2023-08-30 21:55:32,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 204 transitions, 2264 flow [2023-08-30 21:55:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 21:55:32,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 21:55:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2252 transitions. [2023-08-30 21:55:32,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817596202746228 [2023-08-30 21:55:32,016 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2252 transitions. [2023-08-30 21:55:32,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2252 transitions. [2023-08-30 21:55:32,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:32,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2252 transitions. [2023-08-30 21:55:32,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 132.47058823529412) internal successors, (2252), 17 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:32,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:32,037 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:32,037 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 1211 flow. Second operand 17 states and 2252 transitions. [2023-08-30 21:55:32,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 204 transitions, 2264 flow [2023-08-30 21:55:32,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 204 transitions, 2120 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-30 21:55:32,060 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1713 flow [2023-08-30 21:55:32,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1713, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2023-08-30 21:55:32,061 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 87 predicate places. [2023-08-30 21:55:32,061 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1713 flow [2023-08-30 21:55:32,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 128.21428571428572) internal successors, (1795), 14 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:32,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:32,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:32,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 21:55:32,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:32,268 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:32,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:32,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1724646899, now seen corresponding path program 4 times [2023-08-30 21:55:32,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:32,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81537344] [2023-08-30 21:55:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:32,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:32,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:32,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81537344] [2023-08-30 21:55:32,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81537344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:55:32,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504924706] [2023-08-30 21:55:32,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:55:32,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:32,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:32,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:55:32,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:55:32,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:55:32,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:55:32,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 21:55:32,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:55:32,776 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 [2023-08-30 21:55:32,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:55:32,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:55:32,890 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 14 treesize of output 16 [2023-08-30 21:55:33,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-30 21:55:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:55:33,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:55:33,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:55:33,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2023-08-30 21:55:33,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:55:33,440 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 414 treesize of output 326 [2023-08-30 21:55:33,448 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 72 treesize of output 60 [2023-08-30 21:55:33,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:55:33,456 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 38 treesize of output 29 [2023-08-30 21:55:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:55:33,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504924706] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:55:33,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:55:33,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-08-30 21:55:33,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082792676] [2023-08-30 21:55:33,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:55:33,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 21:55:33,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:33,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 21:55:33,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=335, Unknown=3, NotChecked=0, Total=420 [2023-08-30 21:55:34,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 347 [2023-08-30 21:55:34,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1713 flow. Second operand has 21 states, 21 states have (on average 113.66666666666667) internal successors, (2387), 21 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:34,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:34,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 347 [2023-08-30 21:55:34,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:35,358 INFO L130 PetriNetUnfolder]: 476/919 cut-off events. [2023-08-30 21:55:35,359 INFO L131 PetriNetUnfolder]: For 5228/5228 co-relation queries the response was YES. [2023-08-30 21:55:35,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4963 conditions, 919 events. 476/919 cut-off events. For 5228/5228 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4923 event pairs, 11 based on Foata normal form. 4/922 useless extension candidates. Maximal degree in co-relation 4900. Up to 213 conditions per place. [2023-08-30 21:55:35,369 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 97 selfloop transitions, 139 changer transitions 10/246 dead transitions. [2023-08-30 21:55:35,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 246 transitions, 3021 flow [2023-08-30 21:55:35,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 21:55:35,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 21:55:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2139 transitions. [2023-08-30 21:55:35,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424591738712776 [2023-08-30 21:55:35,375 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2139 transitions. [2023-08-30 21:55:35,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2139 transitions. [2023-08-30 21:55:35,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:35,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2139 transitions. [2023-08-30 21:55:35,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 118.83333333333333) internal successors, (2139), 18 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:35,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:35,415 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:35,415 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1713 flow. Second operand 18 states and 2139 transitions. [2023-08-30 21:55:35,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 246 transitions, 3021 flow [2023-08-30 21:55:35,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 246 transitions, 2776 flow, removed 62 selfloop flow, removed 12 redundant places. [2023-08-30 21:55:35,452 INFO L231 Difference]: Finished difference. Result has 114 places, 181 transitions, 2454 flow [2023-08-30 21:55:35,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2454, PETRI_PLACES=114, PETRI_TRANSITIONS=181} [2023-08-30 21:55:35,454 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 93 predicate places. [2023-08-30 21:55:35,454 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 181 transitions, 2454 flow [2023-08-30 21:55:35,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 113.66666666666667) internal successors, (2387), 21 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:35,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:35,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:35,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 21:55:35,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 21:55:35,661 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:35,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:35,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1294223865, now seen corresponding path program 5 times [2023-08-30 21:55:35,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:35,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822240429] [2023-08-30 21:55:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:35,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:55:35,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:35,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822240429] [2023-08-30 21:55:35,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822240429] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:55:35,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103091044] [2023-08-30 21:55:35,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:55:35,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:35,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:35,942 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:55:35,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 21:55:36,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:55:36,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:55:36,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 21:55:36,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:55:36,059 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 [2023-08-30 21:55:36,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:55:36,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:55:36,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-30 21:55:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:55:36,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:55:38,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:55:38,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2023-08-30 21:55:38,937 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:55:38,937 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 94 treesize of output 81 [2023-08-30 21:55:38,943 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 21:55:38,944 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 78 treesize of output 54 [2023-08-30 21:55:38,949 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 21:55:38,949 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 32 treesize of output 20 [2023-08-30 21:55:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:55:38,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103091044] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:55:38,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:55:38,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2023-08-30 21:55:38,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533528091] [2023-08-30 21:55:38,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:55:38,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:55:38,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:55:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=213, Unknown=5, NotChecked=0, Total=306 [2023-08-30 21:55:41,056 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] [2023-08-30 21:55:43,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:55:45,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:55:47,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:55:49,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:55:51,948 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] [2023-08-30 21:55:51,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 347 [2023-08-30 21:55:51,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 181 transitions, 2454 flow. Second operand has 18 states, 18 states have (on average 94.94444444444444) internal successors, (1709), 18 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:51,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:51,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 347 [2023-08-30 21:55:51,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:52,745 INFO L130 PetriNetUnfolder]: 528/1033 cut-off events. [2023-08-30 21:55:52,745 INFO L131 PetriNetUnfolder]: For 7788/7788 co-relation queries the response was YES. [2023-08-30 21:55:52,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6009 conditions, 1033 events. 528/1033 cut-off events. For 7788/7788 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5706 event pairs, 73 based on Foata normal form. 6/1038 useless extension candidates. Maximal degree in co-relation 5733. Up to 792 conditions per place. [2023-08-30 21:55:52,777 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 174 selfloop transitions, 55 changer transitions 11/240 dead transitions. [2023-08-30 21:55:52,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 240 transitions, 3429 flow [2023-08-30 21:55:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 21:55:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 21:55:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1196 transitions. [2023-08-30 21:55:52,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.287223823246878 [2023-08-30 21:55:52,780 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1196 transitions. [2023-08-30 21:55:52,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1196 transitions. [2023-08-30 21:55:52,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:52,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1196 transitions. [2023-08-30 21:55:52,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.66666666666667) internal successors, (1196), 12 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:52,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:52,787 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:52,787 INFO L175 Difference]: Start difference. First operand has 114 places, 181 transitions, 2454 flow. Second operand 12 states and 1196 transitions. [2023-08-30 21:55:52,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 240 transitions, 3429 flow [2023-08-30 21:55:52,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 240 transitions, 3362 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-30 21:55:52,830 INFO L231 Difference]: Finished difference. Result has 126 places, 201 transitions, 2896 flow [2023-08-30 21:55:52,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2896, PETRI_PLACES=126, PETRI_TRANSITIONS=201} [2023-08-30 21:55:52,831 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-08-30 21:55:52,831 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 201 transitions, 2896 flow [2023-08-30 21:55:52,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 94.94444444444444) internal successors, (1709), 18 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:52,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:52,832 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:52,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 21:55:53,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:53,038 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:53,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:53,039 INFO L85 PathProgramCache]: Analyzing trace with hash -469526207, now seen corresponding path program 2 times [2023-08-30 21:55:53,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:53,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389857747] [2023-08-30 21:55:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:53,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:53,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:53,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389857747] [2023-08-30 21:55:53,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389857747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:55:53,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459178057] [2023-08-30 21:55:53,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:55:53,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:53,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:53,176 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:55:53,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 21:55:53,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:55:53,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:55:53,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:55:53,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:55:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:53,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:55:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:53,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459178057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:55:53,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:55:53,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-30 21:55:53,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489248865] [2023-08-30 21:55:53,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:55:53,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 21:55:53,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:53,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 21:55:53,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-30 21:55:53,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-30 21:55:53,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 201 transitions, 2896 flow. Second operand has 11 states, 11 states have (on average 138.45454545454547) internal successors, (1523), 11 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:53,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:53,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-30 21:55:53,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:54,671 INFO L130 PetriNetUnfolder]: 605/1185 cut-off events. [2023-08-30 21:55:54,672 INFO L131 PetriNetUnfolder]: For 8838/8838 co-relation queries the response was YES. [2023-08-30 21:55:54,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 1185 events. 605/1185 cut-off events. For 8838/8838 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6884 event pairs, 70 based on Foata normal form. 28/1212 useless extension candidates. Maximal degree in co-relation 6674. Up to 357 conditions per place. [2023-08-30 21:55:54,684 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 182 selfloop transitions, 119 changer transitions 1/302 dead transitions. [2023-08-30 21:55:54,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 302 transitions, 4219 flow [2023-08-30 21:55:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 21:55:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 21:55:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2425 transitions. [2023-08-30 21:55:54,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110866248516698 [2023-08-30 21:55:54,704 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2425 transitions. [2023-08-30 21:55:54,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2425 transitions. [2023-08-30 21:55:54,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:54,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2425 transitions. [2023-08-30 21:55:54,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 142.64705882352942) internal successors, (2425), 17 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:54,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:54,713 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:54,714 INFO L175 Difference]: Start difference. First operand has 126 places, 201 transitions, 2896 flow. Second operand 17 states and 2425 transitions. [2023-08-30 21:55:54,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 302 transitions, 4219 flow [2023-08-30 21:55:54,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 302 transitions, 4167 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-08-30 21:55:54,769 INFO L231 Difference]: Finished difference. Result has 146 places, 235 transitions, 3664 flow [2023-08-30 21:55:54,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=2854, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3664, PETRI_PLACES=146, PETRI_TRANSITIONS=235} [2023-08-30 21:55:54,770 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2023-08-30 21:55:54,770 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 235 transitions, 3664 flow [2023-08-30 21:55:54,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.45454545454547) internal successors, (1523), 11 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:54,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:54,771 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:54,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 21:55:54,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:54,977 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:54,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:54,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1106126361, now seen corresponding path program 3 times [2023-08-30 21:55:54,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:54,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400222057] [2023-08-30 21:55:54,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:54,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:55,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:55,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400222057] [2023-08-30 21:55:55,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400222057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:55:55,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289595245] [2023-08-30 21:55:55,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:55:55,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:55,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:55,164 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:55:55,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 21:55:55,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:55:55,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:55:55,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:55:55,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:55:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:55,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:55:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:55,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289595245] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:55:55,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:55:55,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 21:55:55,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687777814] [2023-08-30 21:55:55,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:55:55,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:55:55,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:55:55,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:55:55,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-30 21:55:55,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 235 transitions, 3664 flow. Second operand has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:55,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:55,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-30 21:55:55,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:56,578 INFO L130 PetriNetUnfolder]: 700/1350 cut-off events. [2023-08-30 21:55:56,578 INFO L131 PetriNetUnfolder]: For 12122/12122 co-relation queries the response was YES. [2023-08-30 21:55:56,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8675 conditions, 1350 events. 700/1350 cut-off events. For 12122/12122 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7922 event pairs, 124 based on Foata normal form. 12/1361 useless extension candidates. Maximal degree in co-relation 8400. Up to 625 conditions per place. [2023-08-30 21:55:56,588 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 211 selfloop transitions, 115 changer transitions 1/327 dead transitions. [2023-08-30 21:55:56,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 327 transitions, 5104 flow [2023-08-30 21:55:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 21:55:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 21:55:56,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2154 transitions. [2023-08-30 21:55:56,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4138328530259366 [2023-08-30 21:55:56,600 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2154 transitions. [2023-08-30 21:55:56,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2154 transitions. [2023-08-30 21:55:56,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:56,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2154 transitions. [2023-08-30 21:55:56,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 143.6) internal successors, (2154), 15 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:56,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:56,610 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:56,611 INFO L175 Difference]: Start difference. First operand has 146 places, 235 transitions, 3664 flow. Second operand 15 states and 2154 transitions. [2023-08-30 21:55:56,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 327 transitions, 5104 flow [2023-08-30 21:55:56,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 327 transitions, 4961 flow, removed 51 selfloop flow, removed 5 redundant places. [2023-08-30 21:55:56,690 INFO L231 Difference]: Finished difference. Result has 163 places, 264 transitions, 4366 flow [2023-08-30 21:55:56,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4366, PETRI_PLACES=163, PETRI_TRANSITIONS=264} [2023-08-30 21:55:56,691 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-08-30 21:55:56,692 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 264 transitions, 4366 flow [2023-08-30 21:55:56,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:56,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:56,693 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:56,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 21:55:56,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 21:55:56,899 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:56,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1138105375, now seen corresponding path program 4 times [2023-08-30 21:55:56,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:56,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288261777] [2023-08-30 21:55:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:56,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:57,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:57,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288261777] [2023-08-30 21:55:57,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288261777] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:55:57,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645006952] [2023-08-30 21:55:57,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:55:57,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:57,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:57,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:55:57,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 21:55:57,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:55:57,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:55:57,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:55:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:55:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:57,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:55:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:57,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645006952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:55:57,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:55:57,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 21:55:57,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214356952] [2023-08-30 21:55:57,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:55:57,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:55:57,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:57,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:55:57,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:55:57,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-30 21:55:57,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 264 transitions, 4366 flow. Second operand has 12 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:57,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:57,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-30 21:55:57,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:58,423 INFO L130 PetriNetUnfolder]: 679/1327 cut-off events. [2023-08-30 21:55:58,423 INFO L131 PetriNetUnfolder]: For 14282/14282 co-relation queries the response was YES. [2023-08-30 21:55:58,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8940 conditions, 1327 events. 679/1327 cut-off events. For 14282/14282 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 7894 event pairs, 120 based on Foata normal form. 28/1354 useless extension candidates. Maximal degree in co-relation 8784. Up to 629 conditions per place. [2023-08-30 21:55:58,436 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 214 selfloop transitions, 109 changer transitions 1/324 dead transitions. [2023-08-30 21:55:58,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 324 transitions, 5258 flow [2023-08-30 21:55:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 21:55:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 21:55:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2428 transitions. [2023-08-30 21:55:58,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41159518562468217 [2023-08-30 21:55:58,438 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2428 transitions. [2023-08-30 21:55:58,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2428 transitions. [2023-08-30 21:55:58,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:58,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2428 transitions. [2023-08-30 21:55:58,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 142.8235294117647) internal successors, (2428), 17 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:58,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:58,466 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:58,466 INFO L175 Difference]: Start difference. First operand has 163 places, 264 transitions, 4366 flow. Second operand 17 states and 2428 transitions. [2023-08-30 21:55:58,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 324 transitions, 5258 flow [2023-08-30 21:55:58,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 324 transitions, 5142 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-08-30 21:55:58,557 INFO L231 Difference]: Finished difference. Result has 177 places, 263 transitions, 4443 flow [2023-08-30 21:55:58,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4443, PETRI_PLACES=177, PETRI_TRANSITIONS=263} [2023-08-30 21:55:58,558 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2023-08-30 21:55:58,558 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 263 transitions, 4443 flow [2023-08-30 21:55:58,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:58,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:58,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:58,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 21:55:58,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 21:55:58,765 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:58,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:58,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1907636203, now seen corresponding path program 5 times [2023-08-30 21:55:58,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:58,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263076266] [2023-08-30 21:55:58,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:58,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:58,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:58,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263076266] [2023-08-30 21:55:58,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263076266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:55:58,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791439151] [2023-08-30 21:55:58,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:55:58,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:58,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:58,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:55:58,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 21:55:59,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:55:59,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:55:59,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 21:55:59,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:55:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:59,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:55:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:59,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791439151] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:55:59,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:55:59,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-30 21:55:59,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630255868] [2023-08-30 21:55:59,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:55:59,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 21:55:59,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:59,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 21:55:59,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-30 21:55:59,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-30 21:55:59,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 263 transitions, 4443 flow. Second operand has 11 states, 11 states have (on average 138.45454545454547) internal successors, (1523), 11 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:59,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:59,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-30 21:55:59,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:59,834 INFO L130 PetriNetUnfolder]: 763/1475 cut-off events. [2023-08-30 21:55:59,834 INFO L131 PetriNetUnfolder]: For 15441/15441 co-relation queries the response was YES. [2023-08-30 21:55:59,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10115 conditions, 1475 events. 763/1475 cut-off events. For 15441/15441 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8873 event pairs, 102 based on Foata normal form. 12/1486 useless extension candidates. Maximal degree in co-relation 9914. Up to 714 conditions per place. [2023-08-30 21:55:59,847 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 189 selfloop transitions, 133 changer transitions 0/322 dead transitions. [2023-08-30 21:55:59,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 322 transitions, 5667 flow [2023-08-30 21:55:59,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 21:55:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 21:55:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1566 transitions. [2023-08-30 21:55:59,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4102698454283469 [2023-08-30 21:55:59,849 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1566 transitions. [2023-08-30 21:55:59,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1566 transitions. [2023-08-30 21:55:59,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:59,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1566 transitions. [2023-08-30 21:55:59,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 142.36363636363637) internal successors, (1566), 11 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:59,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:59,854 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:59,854 INFO L175 Difference]: Start difference. First operand has 177 places, 263 transitions, 4443 flow. Second operand 11 states and 1566 transitions. [2023-08-30 21:55:59,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 322 transitions, 5667 flow [2023-08-30 21:55:59,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 322 transitions, 5553 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-08-30 21:55:59,958 INFO L231 Difference]: Finished difference. Result has 183 places, 284 transitions, 5098 flow [2023-08-30 21:55:59,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5098, PETRI_PLACES=183, PETRI_TRANSITIONS=284} [2023-08-30 21:55:59,959 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 162 predicate places. [2023-08-30 21:55:59,959 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 284 transitions, 5098 flow [2023-08-30 21:55:59,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.45454545454547) internal successors, (1523), 11 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:59,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:59,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:59,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 21:56:00,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 21:56:00,166 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:56:00,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:56:00,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1697963331, now seen corresponding path program 6 times [2023-08-30 21:56:00,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:56:00,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189339793] [2023-08-30 21:56:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:56:00,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:56:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:56:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:00,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:56:00,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189339793] [2023-08-30 21:56:00,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189339793] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:56:00,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403133934] [2023-08-30 21:56:00,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:56:00,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:00,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:56:00,371 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:56:00,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 21:56:00,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 21:56:00,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:56:00,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:56:00,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:56:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:00,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:56:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:00,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403133934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:56:00,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:56:00,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 21:56:00,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15937426] [2023-08-30 21:56:00,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:56:00,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 21:56:00,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:56:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 21:56:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-30 21:56:00,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-30 21:56:00,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 284 transitions, 5098 flow. Second operand has 13 states, 13 states have (on average 138.07692307692307) internal successors, (1795), 13 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:00,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:56:00,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-30 21:56:00,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:56:01,976 INFO L130 PetriNetUnfolder]: 1108/2170 cut-off events. [2023-08-30 21:56:01,976 INFO L131 PetriNetUnfolder]: For 28091/28091 co-relation queries the response was YES. [2023-08-30 21:56:01,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15541 conditions, 2170 events. 1108/2170 cut-off events. For 28091/28091 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14201 event pairs, 45 based on Foata normal form. 16/2185 useless extension candidates. Maximal degree in co-relation 15275. Up to 545 conditions per place. [2023-08-30 21:56:01,992 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 248 selfloop transitions, 245 changer transitions 0/493 dead transitions. [2023-08-30 21:56:01,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 493 transitions, 8920 flow [2023-08-30 21:56:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 21:56:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 21:56:01,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2726 transitions. [2023-08-30 21:56:01,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41346883057788564 [2023-08-30 21:56:01,996 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2726 transitions. [2023-08-30 21:56:01,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2726 transitions. [2023-08-30 21:56:01,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:56:01,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2726 transitions. [2023-08-30 21:56:02,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 143.47368421052633) internal successors, (2726), 19 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:02,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:02,003 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:02,003 INFO L175 Difference]: Start difference. First operand has 183 places, 284 transitions, 5098 flow. Second operand 19 states and 2726 transitions. [2023-08-30 21:56:02,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 493 transitions, 8920 flow [2023-08-30 21:56:02,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 493 transitions, 8630 flow, removed 63 selfloop flow, removed 5 redundant places. [2023-08-30 21:56:02,126 INFO L231 Difference]: Finished difference. Result has 206 places, 383 transitions, 7499 flow [2023-08-30 21:56:02,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4876, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7499, PETRI_PLACES=206, PETRI_TRANSITIONS=383} [2023-08-30 21:56:02,127 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2023-08-30 21:56:02,127 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 383 transitions, 7499 flow [2023-08-30 21:56:02,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 138.07692307692307) internal successors, (1795), 13 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:02,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:56:02,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:56:02,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 21:56:02,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 21:56:02,334 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:56:02,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:56:02,334 INFO L85 PathProgramCache]: Analyzing trace with hash 625542995, now seen corresponding path program 7 times [2023-08-30 21:56:02,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:56:02,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271022204] [2023-08-30 21:56:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:56:02,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:56:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:56:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:02,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:56:02,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271022204] [2023-08-30 21:56:02,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271022204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:56:02,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889867631] [2023-08-30 21:56:02,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:56:02,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:02,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:56:02,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:56:02,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 21:56:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:56:02,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:56:02,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:56:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:02,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:56:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:02,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889867631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:56:02,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:56:02,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 21:56:02,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430105640] [2023-08-30 21:56:02,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:56:02,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 21:56:02,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:56:02,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 21:56:02,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-08-30 21:56:02,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-30 21:56:02,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 383 transitions, 7499 flow. Second operand has 13 states, 13 states have (on average 138.23076923076923) internal successors, (1797), 13 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:02,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:56:02,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-30 21:56:02,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:56:04,000 INFO L130 PetriNetUnfolder]: 1126/2204 cut-off events. [2023-08-30 21:56:04,000 INFO L131 PetriNetUnfolder]: For 36261/36261 co-relation queries the response was YES. [2023-08-30 21:56:04,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17094 conditions, 2204 events. 1126/2204 cut-off events. For 36261/36261 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14381 event pairs, 55 based on Foata normal form. 12/2215 useless extension candidates. Maximal degree in co-relation 16860. Up to 597 conditions per place. [2023-08-30 21:56:04,022 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 225 selfloop transitions, 248 changer transitions 0/473 dead transitions. [2023-08-30 21:56:04,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 473 transitions, 9358 flow [2023-08-30 21:56:04,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 21:56:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 21:56:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2702 transitions. [2023-08-30 21:56:04,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409828606097376 [2023-08-30 21:56:04,027 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2702 transitions. [2023-08-30 21:56:04,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2702 transitions. [2023-08-30 21:56:04,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:56:04,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2702 transitions. [2023-08-30 21:56:04,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 142.21052631578948) internal successors, (2702), 19 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:04,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:04,037 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:04,037 INFO L175 Difference]: Start difference. First operand has 206 places, 383 transitions, 7499 flow. Second operand 19 states and 2702 transitions. [2023-08-30 21:56:04,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 473 transitions, 9358 flow [2023-08-30 21:56:04,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 473 transitions, 9004 flow, removed 90 selfloop flow, removed 4 redundant places. [2023-08-30 21:56:04,275 INFO L231 Difference]: Finished difference. Result has 226 places, 392 transitions, 8009 flow [2023-08-30 21:56:04,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=7103, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8009, PETRI_PLACES=226, PETRI_TRANSITIONS=392} [2023-08-30 21:56:04,275 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 205 predicate places. [2023-08-30 21:56:04,275 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 392 transitions, 8009 flow [2023-08-30 21:56:04,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 138.23076923076923) internal successors, (1797), 13 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:04,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:56:04,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:56:04,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-30 21:56:04,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:04,477 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:56:04,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:56:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1892416347, now seen corresponding path program 8 times [2023-08-30 21:56:04,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:56:04,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950079692] [2023-08-30 21:56:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:56:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:56:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:56:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:04,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:56:04,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950079692] [2023-08-30 21:56:04,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950079692] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:56:04,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654548121] [2023-08-30 21:56:04,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:56:04,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:04,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:56:04,712 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:56:04,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 21:56:04,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:56:04,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:56:04,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:56:04,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:56:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:04,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:56:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:05,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654548121] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:56:05,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:56:05,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 21:56:05,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821097731] [2023-08-30 21:56:05,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:56:05,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:56:05,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:56:05,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:56:05,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:56:05,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-30 21:56:05,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 392 transitions, 8009 flow. Second operand has 12 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:05,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:56:05,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-30 21:56:05,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:56:06,184 INFO L130 PetriNetUnfolder]: 1189/2331 cut-off events. [2023-08-30 21:56:06,184 INFO L131 PetriNetUnfolder]: For 42784/42784 co-relation queries the response was YES. [2023-08-30 21:56:06,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18687 conditions, 2331 events. 1189/2331 cut-off events. For 42784/42784 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15406 event pairs, 216 based on Foata normal form. 24/2354 useless extension candidates. Maximal degree in co-relation 18376. Up to 1366 conditions per place. [2023-08-30 21:56:06,205 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 296 selfloop transitions, 186 changer transitions 2/484 dead transitions. [2023-08-30 21:56:06,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 484 transitions, 10028 flow [2023-08-30 21:56:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 21:56:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 21:56:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2282 transitions. [2023-08-30 21:56:06,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41102305475504325 [2023-08-30 21:56:06,209 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2282 transitions. [2023-08-30 21:56:06,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2282 transitions. [2023-08-30 21:56:06,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:56:06,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2282 transitions. [2023-08-30 21:56:06,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 142.625) internal successors, (2282), 16 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:06,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 347.0) internal successors, (5899), 17 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:06,216 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 347.0) internal successors, (5899), 17 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:06,216 INFO L175 Difference]: Start difference. First operand has 226 places, 392 transitions, 8009 flow. Second operand 16 states and 2282 transitions. [2023-08-30 21:56:06,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 484 transitions, 10028 flow [2023-08-30 21:56:06,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 484 transitions, 9795 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-08-30 21:56:06,468 INFO L231 Difference]: Finished difference. Result has 238 places, 421 transitions, 9012 flow [2023-08-30 21:56:06,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=7684, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9012, PETRI_PLACES=238, PETRI_TRANSITIONS=421} [2023-08-30 21:56:06,469 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 217 predicate places. [2023-08-30 21:56:06,469 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 421 transitions, 9012 flow [2023-08-30 21:56:06,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:06,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:56:06,470 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:56:06,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 21:56:06,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-30 21:56:06,676 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:56:06,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:56:06,676 INFO L85 PathProgramCache]: Analyzing trace with hash 158319213, now seen corresponding path program 9 times [2023-08-30 21:56:06,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:56:06,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644202348] [2023-08-30 21:56:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:56:06,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:56:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:56:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:06,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:56:06,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644202348] [2023-08-30 21:56:06,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644202348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:56:06,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614898976] [2023-08-30 21:56:06,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:56:06,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:56:06,831 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:56:06,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 21:56:06,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:56:06,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:56:06,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:56:06,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:56:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:07,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:56:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:07,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614898976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:56:07,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:56:07,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 21:56:07,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37994786] [2023-08-30 21:56:07,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:56:07,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:56:07,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:56:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:56:07,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:56:07,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-30 21:56:07,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 421 transitions, 9012 flow. Second operand has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:07,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:56:07,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-30 21:56:07,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:56:08,388 INFO L130 PetriNetUnfolder]: 1196/2314 cut-off events. [2023-08-30 21:56:08,388 INFO L131 PetriNetUnfolder]: For 46147/46147 co-relation queries the response was YES. [2023-08-30 21:56:08,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19529 conditions, 2314 events. 1196/2314 cut-off events. For 46147/46147 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 15011 event pairs, 216 based on Foata normal form. 22/2335 useless extension candidates. Maximal degree in co-relation 19267. Up to 1376 conditions per place. [2023-08-30 21:56:08,407 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 291 selfloop transitions, 185 changer transitions 2/478 dead transitions. [2023-08-30 21:56:08,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 478 transitions, 10462 flow [2023-08-30 21:56:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 21:56:08,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 21:56:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2000 transitions. [2023-08-30 21:56:08,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41169205434335115 [2023-08-30 21:56:08,410 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2000 transitions. [2023-08-30 21:56:08,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2000 transitions. [2023-08-30 21:56:08,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:56:08,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2000 transitions. [2023-08-30 21:56:08,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 142.85714285714286) internal successors, (2000), 14 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:08,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:08,416 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:08,416 INFO L175 Difference]: Start difference. First operand has 238 places, 421 transitions, 9012 flow. Second operand 14 states and 2000 transitions. [2023-08-30 21:56:08,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 478 transitions, 10462 flow [2023-08-30 21:56:08,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 478 transitions, 10314 flow, removed 53 selfloop flow, removed 6 redundant places. [2023-08-30 21:56:08,639 INFO L231 Difference]: Finished difference. Result has 246 places, 427 transitions, 9432 flow [2023-08-30 21:56:08,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8773, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9432, PETRI_PLACES=246, PETRI_TRANSITIONS=427} [2023-08-30 21:56:08,639 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-08-30 21:56:08,640 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 427 transitions, 9432 flow [2023-08-30 21:56:08,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:08,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:56:08,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:56:08,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 21:56:08,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:08,845 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:56:08,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:56:08,845 INFO L85 PathProgramCache]: Analyzing trace with hash -789546511, now seen corresponding path program 10 times [2023-08-30 21:56:08,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:56:08,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122652565] [2023-08-30 21:56:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:56:08,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:56:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:56:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:08,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:56:08,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122652565] [2023-08-30 21:56:08,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122652565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:56:08,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731988884] [2023-08-30 21:56:08,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:56:08,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:08,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:56:08,985 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:56:09,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 21:56:09,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:56:09,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:56:09,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:56:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:56:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:09,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:56:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:09,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731988884] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:56:09,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:56:09,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 21:56:09,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570211103] [2023-08-30 21:56:09,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:56:09,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 21:56:09,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:56:09,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 21:56:09,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-30 21:56:09,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-30 21:56:09,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 427 transitions, 9432 flow. Second operand has 13 states, 13 states have (on average 137.92307692307693) internal successors, (1793), 13 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:09,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:56:09,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-30 21:56:09,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:56:10,593 INFO L130 PetriNetUnfolder]: 1350/2640 cut-off events. [2023-08-30 21:56:10,593 INFO L131 PetriNetUnfolder]: For 54961/54961 co-relation queries the response was YES. [2023-08-30 21:56:10,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22726 conditions, 2640 events. 1350/2640 cut-off events. For 54961/54961 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17644 event pairs, 35 based on Foata normal form. 4/2643 useless extension candidates. Maximal degree in co-relation 22569. Up to 647 conditions per place. [2023-08-30 21:56:10,615 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 309 selfloop transitions, 253 changer transitions 0/562 dead transitions. [2023-08-30 21:56:10,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 562 transitions, 12551 flow [2023-08-30 21:56:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 21:56:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 21:56:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2577 transitions. [2023-08-30 21:56:10,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125840537944284 [2023-08-30 21:56:10,618 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2577 transitions. [2023-08-30 21:56:10,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2577 transitions. [2023-08-30 21:56:10,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:56:10,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2577 transitions. [2023-08-30 21:56:10,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 143.16666666666666) internal successors, (2577), 18 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:10,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:10,625 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:10,625 INFO L175 Difference]: Start difference. First operand has 246 places, 427 transitions, 9432 flow. Second operand 18 states and 2577 transitions. [2023-08-30 21:56:10,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 562 transitions, 12551 flow [2023-08-30 21:56:10,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 562 transitions, 12203 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-08-30 21:56:10,890 INFO L231 Difference]: Finished difference. Result has 253 places, 444 transitions, 10131 flow [2023-08-30 21:56:10,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9054, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10131, PETRI_PLACES=253, PETRI_TRANSITIONS=444} [2023-08-30 21:56:10,890 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 232 predicate places. [2023-08-30 21:56:10,890 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 444 transitions, 10131 flow [2023-08-30 21:56:10,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 137.92307692307693) internal successors, (1793), 13 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:10,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:56:10,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:56:10,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 21:56:11,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:11,091 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:56:11,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:56:11,092 INFO L85 PathProgramCache]: Analyzing trace with hash -212875034, now seen corresponding path program 1 times [2023-08-30 21:56:11,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:56:11,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227862124] [2023-08-30 21:56:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:56:11,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:56:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:56:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:56:11,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:56:11,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227862124] [2023-08-30 21:56:11,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227862124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:56:11,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853712505] [2023-08-30 21:56:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:56:11,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:11,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:56:11,209 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:56:11,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 21:56:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:56:11,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 21:56:11,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:56:11,353 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 [2023-08-30 21:56:11,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:56:11,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:56:11,690 INFO L321 Elim1Store]: treesize reduction 23, result has 56.6 percent of original size [2023-08-30 21:56:11,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 151 [2023-08-30 21:56:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:56:11,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:56:12,064 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x2~0 Int) (v_ArrVal_631 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* ~x2~0 4))))) (or (< .cse0 0) (= (select .cse1 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse1 (+ (* 4 .cse0) c_~f~0.offset))) (<= c_~size~0 .cse0))))) is different from false [2023-08-30 21:56:12,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:56:12,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2023-08-30 21:56:12,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:56:12,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 254 treesize of output 254 [2023-08-30 21:56:12,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:56:12,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 194 [2023-08-30 21:56:12,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:56:12,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 101 [2023-08-30 21:56:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:56:12,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853712505] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:56:12,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:56:12,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-08-30 21:56:12,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081405026] [2023-08-30 21:56:12,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:56:12,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:56:12,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:56:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:56:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=255, Unknown=1, NotChecked=32, Total=342 [2023-08-30 21:56:12,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-08-30 21:56:12,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 444 transitions, 10131 flow. Second operand has 19 states, 19 states have (on average 75.57894736842105) internal successors, (1436), 19 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:12,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:56:12,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-08-30 21:56:12,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:56:14,487 INFO L130 PetriNetUnfolder]: 1673/3401 cut-off events. [2023-08-30 21:56:14,487 INFO L131 PetriNetUnfolder]: For 83073/83073 co-relation queries the response was YES. [2023-08-30 21:56:14,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28798 conditions, 3401 events. 1673/3401 cut-off events. For 83073/83073 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24940 event pairs, 172 based on Foata normal form. 148/3548 useless extension candidates. Maximal degree in co-relation 28642. Up to 1386 conditions per place. [2023-08-30 21:56:14,515 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 395 selfloop transitions, 133 changer transitions 161/689 dead transitions. [2023-08-30 21:56:14,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 689 transitions, 15671 flow [2023-08-30 21:56:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 21:56:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 21:56:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1836 transitions. [2023-08-30 21:56:14,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23004636010524998 [2023-08-30 21:56:14,518 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1836 transitions. [2023-08-30 21:56:14,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1836 transitions. [2023-08-30 21:56:14,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:56:14,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1836 transitions. [2023-08-30 21:56:14,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 79.82608695652173) internal successors, (1836), 23 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:14,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:14,527 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:14,527 INFO L175 Difference]: Start difference. First operand has 253 places, 444 transitions, 10131 flow. Second operand 23 states and 1836 transitions. [2023-08-30 21:56:14,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 689 transitions, 15671 flow [2023-08-30 21:56:14,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 689 transitions, 14983 flow, removed 100 selfloop flow, removed 9 redundant places. [2023-08-30 21:56:14,918 INFO L231 Difference]: Finished difference. Result has 275 places, 442 transitions, 9940 flow [2023-08-30 21:56:14,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9940, PETRI_PLACES=275, PETRI_TRANSITIONS=442} [2023-08-30 21:56:14,919 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-08-30 21:56:14,919 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 442 transitions, 9940 flow [2023-08-30 21:56:14,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 75.57894736842105) internal successors, (1436), 19 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:14,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:56:14,920 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:56:14,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 21:56:15,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 21:56:15,125 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:56:15,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:56:15,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1127277119, now seen corresponding path program 6 times [2023-08-30 21:56:15,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:56:15,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084484550] [2023-08-30 21:56:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:56:15,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:56:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:56:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:56:15,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:56:15,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084484550] [2023-08-30 21:56:15,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084484550] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:56:15,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901990119] [2023-08-30 21:56:15,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:56:15,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:15,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:56:15,233 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:56:15,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 21:56:15,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 21:56:15,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:56:15,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 21:56:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:56:15,608 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:56:15,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:56:15,609 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 [2023-08-30 21:56:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:56:15,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:56:15,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:56:15,923 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 136 treesize of output 128 [2023-08-30 21:56:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:56:16,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901990119] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:56:16,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:56:16,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2023-08-30 21:56:16,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880381225] [2023-08-30 21:56:16,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:56:16,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 21:56:16,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:56:16,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 21:56:16,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-08-30 21:56:18,369 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] [2023-08-30 21:56:19,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 347 [2023-08-30 21:56:19,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 442 transitions, 9940 flow. Second operand has 21 states, 21 states have (on average 117.19047619047619) internal successors, (2461), 21 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:19,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:56:19,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 347 [2023-08-30 21:56:19,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:56:20,666 INFO L130 PetriNetUnfolder]: 1622/3315 cut-off events. [2023-08-30 21:56:20,666 INFO L131 PetriNetUnfolder]: For 73385/73385 co-relation queries the response was YES. [2023-08-30 21:56:20,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28852 conditions, 3315 events. 1622/3315 cut-off events. For 73385/73385 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 24234 event pairs, 87 based on Foata normal form. 53/3367 useless extension candidates. Maximal degree in co-relation 28683. Up to 1119 conditions per place. [2023-08-30 21:56:20,695 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 393 selfloop transitions, 107 changer transitions 166/666 dead transitions. [2023-08-30 21:56:20,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 666 transitions, 15425 flow [2023-08-30 21:56:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 21:56:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 21:56:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3360 transitions. [2023-08-30 21:56:20,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345821325648415 [2023-08-30 21:56:20,700 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3360 transitions. [2023-08-30 21:56:20,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3360 transitions. [2023-08-30 21:56:20,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:56:20,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3360 transitions. [2023-08-30 21:56:20,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 120.0) internal successors, (3360), 28 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:20,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:20,711 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:20,711 INFO L175 Difference]: Start difference. First operand has 275 places, 442 transitions, 9940 flow. Second operand 28 states and 3360 transitions. [2023-08-30 21:56:20,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 666 transitions, 15425 flow [2023-08-30 21:56:21,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 666 transitions, 15053 flow, removed 167 selfloop flow, removed 11 redundant places. [2023-08-30 21:56:21,137 INFO L231 Difference]: Finished difference. Result has 285 places, 399 transitions, 8984 flow [2023-08-30 21:56:21,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9583, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8984, PETRI_PLACES=285, PETRI_TRANSITIONS=399} [2023-08-30 21:56:21,138 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2023-08-30 21:56:21,138 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 399 transitions, 8984 flow [2023-08-30 21:56:21,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 117.19047619047619) internal successors, (2461), 21 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:21,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:56:21,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:56:21,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 21:56:21,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:21,356 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:56:21,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:56:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash 289751092, now seen corresponding path program 11 times [2023-08-30 21:56:21,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:56:21,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813363862] [2023-08-30 21:56:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:56:21,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:56:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:56:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:21,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:56:21,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813363862] [2023-08-30 21:56:21,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813363862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:56:21,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406680255] [2023-08-30 21:56:21,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:56:21,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:21,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:56:21,585 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:56:21,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 21:56:21,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:56:21,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:56:21,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 21:56:21,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:56:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:21,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:56:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:56:22,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406680255] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:56:22,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:56:22,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-30 21:56:22,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024132197] [2023-08-30 21:56:22,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:56:22,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 21:56:22,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:56:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 21:56:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-08-30 21:56:22,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-30 21:56:22,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 399 transitions, 8984 flow. Second operand has 14 states, 14 states have (on average 138.14285714285714) internal successors, (1934), 14 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:22,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:56:22,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-30 21:56:22,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:56:23,573 INFO L130 PetriNetUnfolder]: 1235/2475 cut-off events. [2023-08-30 21:56:23,573 INFO L131 PetriNetUnfolder]: For 53898/53898 co-relation queries the response was YES. [2023-08-30 21:56:23,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21387 conditions, 2475 events. 1235/2475 cut-off events. For 53898/53898 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16526 event pairs, 183 based on Foata normal form. 16/2490 useless extension candidates. Maximal degree in co-relation 21220. Up to 927 conditions per place. [2023-08-30 21:56:23,599 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 267 selfloop transitions, 195 changer transitions 1/463 dead transitions. [2023-08-30 21:56:23,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 463 transitions, 10351 flow [2023-08-30 21:56:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 21:56:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 21:56:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2549 transitions. [2023-08-30 21:56:23,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40810118475824525 [2023-08-30 21:56:23,603 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2549 transitions. [2023-08-30 21:56:23,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2549 transitions. [2023-08-30 21:56:23,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:56:23,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2549 transitions. [2023-08-30 21:56:23,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 141.61111111111111) internal successors, (2549), 18 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:23,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:23,612 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:23,612 INFO L175 Difference]: Start difference. First operand has 285 places, 399 transitions, 8984 flow. Second operand 18 states and 2549 transitions. [2023-08-30 21:56:23,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 463 transitions, 10351 flow [2023-08-30 21:56:23,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 463 transitions, 9611 flow, removed 125 selfloop flow, removed 23 redundant places. [2023-08-30 21:56:23,862 INFO L231 Difference]: Finished difference. Result has 265 places, 405 transitions, 8805 flow [2023-08-30 21:56:23,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8277, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8805, PETRI_PLACES=265, PETRI_TRANSITIONS=405} [2023-08-30 21:56:23,863 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2023-08-30 21:56:23,863 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 405 transitions, 8805 flow [2023-08-30 21:56:23,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 138.14285714285714) internal successors, (1934), 14 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:56:23,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:56:23,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:56:23,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-30 21:56:24,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:24,065 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:56:24,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:56:24,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1623000778, now seen corresponding path program 2 times [2023-08-30 21:56:24,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:56:24,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468453132] [2023-08-30 21:56:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:56:24,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:56:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:56:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:56:24,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:56:24,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468453132] [2023-08-30 21:56:24,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468453132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:56:24,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89865231] [2023-08-30 21:56:24,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:56:24,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:56:24,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:56:24,918 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:56:24,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 21:56:25,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:56:25,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:56:25,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 21:56:25,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:56:25,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 21:56:25,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:56:25,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:56:25,585 INFO L321 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2023-08-30 21:56:25,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2023-08-30 21:56:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:56:25,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:56:26,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:56:26,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2023-08-30 21:56:26,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:56:26,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 540 treesize of output 500 [2023-08-30 21:56:26,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:56:26,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 116 [2023-08-30 21:56:26,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:56:26,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 113 [2023-08-30 21:56:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:56:27,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89865231] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:56:27,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:56:27,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 21:56:27,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510918411] [2023-08-30 21:56:27,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:56:27,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 21:56:27,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:56:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 21:56:27,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=879, Unknown=6, NotChecked=0, Total=1056 [2023-08-30 21:56:29,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:31,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:33,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:35,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:37,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:39,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:41,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:43,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:45,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:47,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:49,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:51,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:53,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:55,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:57,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:59,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:01,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:03,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:05,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:07,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:10,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:12,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:14,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:16,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:18,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:20,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:22,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:24,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:26,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:28,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:30,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:32,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:34,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:36,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:38,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:40,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:40,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-08-30 21:57:40,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 405 transitions, 8805 flow. Second operand has 33 states, 33 states have (on average 74.51515151515152) internal successors, (2459), 33 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:40,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:57:40,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-08-30 21:57:40,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:57:46,525 INFO L130 PetriNetUnfolder]: 1541/3100 cut-off events. [2023-08-30 21:57:46,525 INFO L131 PetriNetUnfolder]: For 57246/57246 co-relation queries the response was YES. [2023-08-30 21:57:46,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25127 conditions, 3100 events. 1541/3100 cut-off events. For 57246/57246 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21833 event pairs, 129 based on Foata normal form. 39/3138 useless extension candidates. Maximal degree in co-relation 24967. Up to 1819 conditions per place. [2023-08-30 21:57:46,552 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 430 selfloop transitions, 101 changer transitions 111/642 dead transitions. [2023-08-30 21:57:46,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 642 transitions, 13257 flow [2023-08-30 21:57:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 21:57:46,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 21:57:46,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2525 transitions. [2023-08-30 21:57:46,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2273955331412104 [2023-08-30 21:57:46,555 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2525 transitions. [2023-08-30 21:57:46,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2525 transitions. [2023-08-30 21:57:46,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:57:46,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2525 transitions. [2023-08-30 21:57:46,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 78.90625) internal successors, (2525), 32 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:46,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:46,565 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:46,566 INFO L175 Difference]: Start difference. First operand has 265 places, 405 transitions, 8805 flow. Second operand 32 states and 2525 transitions. [2023-08-30 21:57:46,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 642 transitions, 13257 flow [2023-08-30 21:57:46,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 642 transitions, 12846 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-08-30 21:57:46,850 INFO L231 Difference]: Finished difference. Result has 309 places, 442 transitions, 9681 flow [2023-08-30 21:57:46,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8503, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9681, PETRI_PLACES=309, PETRI_TRANSITIONS=442} [2023-08-30 21:57:46,851 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-08-30 21:57:46,851 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 442 transitions, 9681 flow [2023-08-30 21:57:46,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 74.51515151515152) internal successors, (2459), 33 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:46,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:57:46,851 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:57:46,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 21:57:47,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:57:47,060 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:57:47,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:57:47,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1456848755, now seen corresponding path program 7 times [2023-08-30 21:57:47,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:57:47,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266248998] [2023-08-30 21:57:47,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:57:47,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:57:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:57:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:57:47,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:57:47,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266248998] [2023-08-30 21:57:47,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266248998] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:57:47,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087398728] [2023-08-30 21:57:47,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:57:47,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:57:47,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:57:47,345 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:57:47,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 21:57:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:57:47,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 21:57:47,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:57:47,751 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:57:47,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:57:47,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-30 21:57:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:57:47,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:57:48,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:57:48,030 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 71 treesize of output 56 [2023-08-30 21:57:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:57:48,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087398728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:57:48,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:57:48,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-08-30 21:57:48,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759583149] [2023-08-30 21:57:48,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:57:48,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 21:57:48,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:57:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 21:57:48,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-08-30 21:57:49,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 347 [2023-08-30 21:57:49,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 442 transitions, 9681 flow. Second operand has 24 states, 24 states have (on average 118.125) internal successors, (2835), 24 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:49,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:57:49,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 347 [2023-08-30 21:57:49,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:57:51,841 INFO L130 PetriNetUnfolder]: 1470/2904 cut-off events. [2023-08-30 21:57:51,841 INFO L131 PetriNetUnfolder]: For 59284/59284 co-relation queries the response was YES. [2023-08-30 21:57:51,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24732 conditions, 2904 events. 1470/2904 cut-off events. For 59284/59284 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19669 event pairs, 138 based on Foata normal form. 19/2922 useless extension candidates. Maximal degree in co-relation 24555. Up to 2072 conditions per place. [2023-08-30 21:57:51,871 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 407 selfloop transitions, 112 changer transitions 71/590 dead transitions. [2023-08-30 21:57:51,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 590 transitions, 12513 flow [2023-08-30 21:57:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 21:57:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 21:57:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3889 transitions. [2023-08-30 21:57:51,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3502341498559078 [2023-08-30 21:57:51,875 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3889 transitions. [2023-08-30 21:57:51,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3889 transitions. [2023-08-30 21:57:51,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:57:51,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3889 transitions. [2023-08-30 21:57:51,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 121.53125) internal successors, (3889), 32 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:51,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:51,888 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:51,888 INFO L175 Difference]: Start difference. First operand has 309 places, 442 transitions, 9681 flow. Second operand 32 states and 3889 transitions. [2023-08-30 21:57:51,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 590 transitions, 12513 flow [2023-08-30 21:57:52,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 590 transitions, 12163 flow, removed 155 selfloop flow, removed 16 redundant places. [2023-08-30 21:57:52,232 INFO L231 Difference]: Finished difference. Result has 318 places, 445 transitions, 9876 flow [2023-08-30 21:57:52,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9332, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9876, PETRI_PLACES=318, PETRI_TRANSITIONS=445} [2023-08-30 21:57:52,233 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 297 predicate places. [2023-08-30 21:57:52,233 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 445 transitions, 9876 flow [2023-08-30 21:57:52,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 118.125) internal successors, (2835), 24 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:52,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:57:52,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:57:52,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 21:57:52,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 21:57:52,434 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:57:52,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:57:52,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1057721665, now seen corresponding path program 3 times [2023-08-30 21:57:52,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:57:52,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857343349] [2023-08-30 21:57:52,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:57:52,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:57:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:57:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:57:53,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:57:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857343349] [2023-08-30 21:57:53,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857343349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:57:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251701855] [2023-08-30 21:57:53,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:57:53,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:57:53,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:57:53,754 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:57:53,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 21:57:53,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:57:53,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:57:53,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 21:57:53,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:57:54,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:57:54,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-30 21:57:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:57:54,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:57:54,634 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-30 21:57:54,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-30 21:57:54,701 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-30 21:57:54,701 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-30 21:57:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:57:54,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251701855] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:57:54,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:57:54,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-30 21:57:54,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705833555] [2023-08-30 21:57:54,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:57:54,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:57:54,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:57:54,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:57:54,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:57:57,648 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 [] [2023-08-30 21:57:59,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-08-30 21:57:59,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 445 transitions, 9876 flow. Second operand has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:59,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:57:59,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-08-30 21:57:59,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:58:02,596 INFO L130 PetriNetUnfolder]: 1576/3098 cut-off events. [2023-08-30 21:58:02,596 INFO L131 PetriNetUnfolder]: For 64253/64253 co-relation queries the response was YES. [2023-08-30 21:58:02,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26742 conditions, 3098 events. 1576/3098 cut-off events. For 64253/64253 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21189 event pairs, 155 based on Foata normal form. 6/3102 useless extension candidates. Maximal degree in co-relation 26566. Up to 2427 conditions per place. [2023-08-30 21:58:02,624 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 429 selfloop transitions, 185 changer transitions 23/637 dead transitions. [2023-08-30 21:58:02,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 637 transitions, 13657 flow [2023-08-30 21:58:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:58:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:58:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4153 transitions. [2023-08-30 21:58:02,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34195142033758746 [2023-08-30 21:58:02,627 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4153 transitions. [2023-08-30 21:58:02,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4153 transitions. [2023-08-30 21:58:02,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:58:02,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4153 transitions. [2023-08-30 21:58:02,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 118.65714285714286) internal successors, (4153), 35 states have internal predecessors, (4153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:02,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:02,639 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:02,639 INFO L175 Difference]: Start difference. First operand has 318 places, 445 transitions, 9876 flow. Second operand 35 states and 4153 transitions. [2023-08-30 21:58:02,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 637 transitions, 13657 flow [2023-08-30 21:58:02,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 637 transitions, 13228 flow, removed 63 selfloop flow, removed 18 redundant places. [2023-08-30 21:58:02,940 INFO L231 Difference]: Finished difference. Result has 336 places, 528 transitions, 11946 flow [2023-08-30 21:58:02,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11946, PETRI_PLACES=336, PETRI_TRANSITIONS=528} [2023-08-30 21:58:02,941 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 315 predicate places. [2023-08-30 21:58:02,941 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 528 transitions, 11946 flow [2023-08-30 21:58:02,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:02,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:58:02,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:58:02,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 21:58:03,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 21:58:03,148 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:58:03,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:58:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash 457305767, now seen corresponding path program 4 times [2023-08-30 21:58:03,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:58:03,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390888290] [2023-08-30 21:58:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:58:03,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:58:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:58:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:58:04,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:58:04,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390888290] [2023-08-30 21:58:04,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390888290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:58:04,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141383899] [2023-08-30 21:58:04,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:58:04,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:58:04,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:58:04,254 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:58:04,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 21:58:04,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:58:04,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:58:04,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 21:58:04,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:58:04,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:58:04,601 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-08-30 21:58:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:58:04,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:58:05,331 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-30 21:58:05,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-30 21:58:05,396 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-30 21:58:05,396 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-30 21:58:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:05,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141383899] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:58:05,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:58:05,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-30 21:58:05,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322526683] [2023-08-30 21:58:05,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:58:05,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:58:05,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:58:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:58:05,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:58:07,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-08-30 21:58:07,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 528 transitions, 11946 flow. Second operand has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:07,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:58:07,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-08-30 21:58:07,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:58:10,362 INFO L130 PetriNetUnfolder]: 1596/3144 cut-off events. [2023-08-30 21:58:10,362 INFO L131 PetriNetUnfolder]: For 67191/67191 co-relation queries the response was YES. [2023-08-30 21:58:10,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27955 conditions, 3144 events. 1596/3144 cut-off events. For 67191/67191 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21664 event pairs, 183 based on Foata normal form. 6/3148 useless extension candidates. Maximal degree in co-relation 27763. Up to 2479 conditions per place. [2023-08-30 21:58:10,396 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 446 selfloop transitions, 170 changer transitions 15/631 dead transitions. [2023-08-30 21:58:10,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 631 transitions, 14015 flow [2023-08-30 21:58:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 21:58:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 21:58:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3338 transitions. [2023-08-30 21:58:10,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34355701934952654 [2023-08-30 21:58:10,399 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3338 transitions. [2023-08-30 21:58:10,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3338 transitions. [2023-08-30 21:58:10,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:58:10,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3338 transitions. [2023-08-30 21:58:10,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 119.21428571428571) internal successors, (3338), 28 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:10,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:10,408 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:10,408 INFO L175 Difference]: Start difference. First operand has 336 places, 528 transitions, 11946 flow. Second operand 28 states and 3338 transitions. [2023-08-30 21:58:10,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 631 transitions, 14015 flow [2023-08-30 21:58:10,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 631 transitions, 13624 flow, removed 155 selfloop flow, removed 11 redundant places. [2023-08-30 21:58:10,794 INFO L231 Difference]: Finished difference. Result has 358 places, 545 transitions, 12428 flow [2023-08-30 21:58:10,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=11630, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12428, PETRI_PLACES=358, PETRI_TRANSITIONS=545} [2023-08-30 21:58:10,795 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 337 predicate places. [2023-08-30 21:58:10,795 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 545 transitions, 12428 flow [2023-08-30 21:58:10,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:10,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:58:10,796 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:58:10,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 21:58:11,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 21:58:11,001 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:58:11,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:58:11,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1593429793, now seen corresponding path program 5 times [2023-08-30 21:58:11,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:58:11,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046318519] [2023-08-30 21:58:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:58:11,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:58:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:58:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:58:12,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:58:12,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046318519] [2023-08-30 21:58:12,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046318519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:58:12,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976260446] [2023-08-30 21:58:12,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:58:12,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:58:12,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:58:12,070 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:58:12,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 21:58:12,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:58:12,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:58:12,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 21:58:12,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:58:12,575 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:58:12,592 INFO L321 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-08-30 21:58:12,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 33 [2023-08-30 21:58:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:58:12,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:58:13,303 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-30 21:58:13,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-30 21:58:13,369 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-30 21:58:13,370 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-30 21:58:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:13,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976260446] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:58:13,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:58:13,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2023-08-30 21:58:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640952961] [2023-08-30 21:58:13,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:58:13,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 21:58:13,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:58:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 21:58:13,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-08-30 21:58:18,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 347 [2023-08-30 21:58:18,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 545 transitions, 12428 flow. Second operand has 30 states, 30 states have (on average 113.73333333333333) internal successors, (3412), 30 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:18,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:58:18,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 347 [2023-08-30 21:58:18,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:58:21,406 INFO L130 PetriNetUnfolder]: 1625/3195 cut-off events. [2023-08-30 21:58:21,406 INFO L131 PetriNetUnfolder]: For 69894/69894 co-relation queries the response was YES. [2023-08-30 21:58:21,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28688 conditions, 3195 events. 1625/3195 cut-off events. For 69894/69894 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22001 event pairs, 173 based on Foata normal form. 4/3198 useless extension candidates. Maximal degree in co-relation 28489. Up to 2545 conditions per place. [2023-08-30 21:58:21,444 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 455 selfloop transitions, 178 changer transitions 21/654 dead transitions. [2023-08-30 21:58:21,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 654 transitions, 14454 flow [2023-08-30 21:58:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 21:58:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 21:58:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3780 transitions. [2023-08-30 21:58:21,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404178674351585 [2023-08-30 21:58:21,448 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3780 transitions. [2023-08-30 21:58:21,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3780 transitions. [2023-08-30 21:58:21,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:58:21,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3780 transitions. [2023-08-30 21:58:21,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 118.125) internal successors, (3780), 32 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:21,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:21,457 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:21,457 INFO L175 Difference]: Start difference. First operand has 358 places, 545 transitions, 12428 flow. Second operand 32 states and 3780 transitions. [2023-08-30 21:58:21,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 654 transitions, 14454 flow [2023-08-30 21:58:21,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 654 transitions, 14282 flow, removed 49 selfloop flow, removed 12 redundant places. [2023-08-30 21:58:21,998 INFO L231 Difference]: Finished difference. Result has 381 places, 554 transitions, 12866 flow [2023-08-30 21:58:21,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=12260, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12866, PETRI_PLACES=381, PETRI_TRANSITIONS=554} [2023-08-30 21:58:21,999 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 360 predicate places. [2023-08-30 21:58:22,000 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 554 transitions, 12866 flow [2023-08-30 21:58:22,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 113.73333333333333) internal successors, (3412), 30 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:22,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:58:22,000 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:58:22,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 21:58:22,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:58:22,206 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:58:22,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:58:22,206 INFO L85 PathProgramCache]: Analyzing trace with hash -571252333, now seen corresponding path program 6 times [2023-08-30 21:58:22,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:58:22,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857066649] [2023-08-30 21:58:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:58:22,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:58:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:58:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:58:23,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:58:23,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857066649] [2023-08-30 21:58:23,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857066649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:58:23,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555906886] [2023-08-30 21:58:23,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:58:23,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:58:23,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:58:23,258 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:58:23,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 21:58:23,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 21:58:23,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:58:23,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 21:58:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:58:23,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:58:23,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-30 21:58:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:58:23,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:58:24,328 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-30 21:58:24,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-30 21:58:24,394 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-30 21:58:24,394 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-30 21:58:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:24,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555906886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:58:24,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:58:24,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-30 21:58:24,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675473852] [2023-08-30 21:58:24,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:58:24,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:58:24,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:58:24,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:58:24,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:58:27,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-08-30 21:58:27,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 554 transitions, 12866 flow. Second operand has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:27,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:58:27,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-08-30 21:58:27,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:58:30,818 INFO L130 PetriNetUnfolder]: 1722/3362 cut-off events. [2023-08-30 21:58:30,818 INFO L131 PetriNetUnfolder]: For 77790/77790 co-relation queries the response was YES. [2023-08-30 21:58:30,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30870 conditions, 3362 events. 1722/3362 cut-off events. For 77790/77790 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 23342 event pairs, 221 based on Foata normal form. 5/3366 useless extension candidates. Maximal degree in co-relation 30665. Up to 2866 conditions per place. [2023-08-30 21:58:30,854 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 517 selfloop transitions, 145 changer transitions 21/683 dead transitions. [2023-08-30 21:58:30,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 683 transitions, 15742 flow [2023-08-30 21:58:30,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:58:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:58:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4144 transitions. [2023-08-30 21:58:30,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34121037463976944 [2023-08-30 21:58:30,858 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4144 transitions. [2023-08-30 21:58:30,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4144 transitions. [2023-08-30 21:58:30,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:58:30,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4144 transitions. [2023-08-30 21:58:30,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 118.4) internal successors, (4144), 35 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:30,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:30,870 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:30,870 INFO L175 Difference]: Start difference. First operand has 381 places, 554 transitions, 12866 flow. Second operand 35 states and 4144 transitions. [2023-08-30 21:58:30,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 683 transitions, 15742 flow [2023-08-30 21:58:31,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 683 transitions, 15405 flow, removed 27 selfloop flow, removed 25 redundant places. [2023-08-30 21:58:31,392 INFO L231 Difference]: Finished difference. Result has 396 places, 594 transitions, 13952 flow [2023-08-30 21:58:31,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=12543, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13952, PETRI_PLACES=396, PETRI_TRANSITIONS=594} [2023-08-30 21:58:31,393 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 375 predicate places. [2023-08-30 21:58:31,393 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 594 transitions, 13952 flow [2023-08-30 21:58:31,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:31,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:58:31,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:58:31,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 21:58:31,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:58:31,599 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:58:31,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:58:31,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1478888581, now seen corresponding path program 7 times [2023-08-30 21:58:31,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:58:31,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112747801] [2023-08-30 21:58:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:58:31,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:58:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:58:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:58:32,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:58:32,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112747801] [2023-08-30 21:58:32,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112747801] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:58:32,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287599857] [2023-08-30 21:58:32,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:58:32,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:58:32,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:58:32,842 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:58:32,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 21:58:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:58:32,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 21:58:32,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:58:33,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:58:33,203 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-08-30 21:58:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:33,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:58:33,952 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-30 21:58:33,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-30 21:58:34,018 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-30 21:58:34,018 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-30 21:58:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:34,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287599857] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:58:34,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:58:34,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 27 [2023-08-30 21:58:34,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209383330] [2023-08-30 21:58:34,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:58:34,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:58:34,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:58:34,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:58:34,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:58:36,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 347 [2023-08-30 21:58:36,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 594 transitions, 13952 flow. Second operand has 29 states, 29 states have (on average 112.62068965517241) internal successors, (3266), 29 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:36,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:58:36,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 347 [2023-08-30 21:58:36,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:58:40,401 INFO L130 PetriNetUnfolder]: 1781/3477 cut-off events. [2023-08-30 21:58:40,401 INFO L131 PetriNetUnfolder]: For 84319/84319 co-relation queries the response was YES. [2023-08-30 21:58:40,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32396 conditions, 3477 events. 1781/3477 cut-off events. For 84319/84319 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24306 event pairs, 243 based on Foata normal form. 3/3479 useless extension candidates. Maximal degree in co-relation 32184. Up to 3047 conditions per place. [2023-08-30 21:58:40,439 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 548 selfloop transitions, 138 changer transitions 15/701 dead transitions. [2023-08-30 21:58:40,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 701 transitions, 16523 flow [2023-08-30 21:58:40,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 21:58:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 21:58:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3709 transitions. [2023-08-30 21:58:40,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33402377521613835 [2023-08-30 21:58:40,442 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3709 transitions. [2023-08-30 21:58:40,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3709 transitions. [2023-08-30 21:58:40,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:58:40,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3709 transitions. [2023-08-30 21:58:40,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 115.90625) internal successors, (3709), 32 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:40,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:40,451 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:40,451 INFO L175 Difference]: Start difference. First operand has 396 places, 594 transitions, 13952 flow. Second operand 32 states and 3709 transitions. [2023-08-30 21:58:40,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 701 transitions, 16523 flow [2023-08-30 21:58:40,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 701 transitions, 15733 flow, removed 83 selfloop flow, removed 21 redundant places. [2023-08-30 21:58:40,896 INFO L231 Difference]: Finished difference. Result has 412 places, 630 transitions, 14397 flow [2023-08-30 21:58:40,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=13206, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14397, PETRI_PLACES=412, PETRI_TRANSITIONS=630} [2023-08-30 21:58:40,898 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 391 predicate places. [2023-08-30 21:58:40,898 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 630 transitions, 14397 flow [2023-08-30 21:58:40,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 112.62068965517241) internal successors, (3266), 29 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:40,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:58:40,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:58:40,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 21:58:41,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 21:58:41,104 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:58:41,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:58:41,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1479483227, now seen corresponding path program 8 times [2023-08-30 21:58:41,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:58:41,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175495340] [2023-08-30 21:58:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:58:41,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:58:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:58:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:58:41,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:58:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175495340] [2023-08-30 21:58:41,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175495340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:58:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702118799] [2023-08-30 21:58:41,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:58:41,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:58:41,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:58:41,981 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:58:41,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 21:58:42,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:58:42,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:58:42,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 21:58:42,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:58:42,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:58:42,359 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-08-30 21:58:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:58:42,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:58:43,059 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-30 21:58:43,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-30 21:58:43,116 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-30 21:58:43,117 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-30 21:58:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:43,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702118799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:58:43,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:58:43,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-30 21:58:43,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194218287] [2023-08-30 21:58:43,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:58:43,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:58:43,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:58:43,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:58:43,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:58:46,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 347 [2023-08-30 21:58:46,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 630 transitions, 14397 flow. Second operand has 29 states, 29 states have (on average 117.65517241379311) internal successors, (3412), 29 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:46,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:58:46,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 347 [2023-08-30 21:58:46,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:58:49,828 INFO L130 PetriNetUnfolder]: 1826/3559 cut-off events. [2023-08-30 21:58:49,828 INFO L131 PetriNetUnfolder]: For 89339/89339 co-relation queries the response was YES. [2023-08-30 21:58:49,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33151 conditions, 3559 events. 1826/3559 cut-off events. For 89339/89339 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24992 event pairs, 233 based on Foata normal form. 7/3565 useless extension candidates. Maximal degree in co-relation 32935. Up to 3050 conditions per place. [2023-08-30 21:58:49,866 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 564 selfloop transitions, 145 changer transitions 26/735 dead transitions. [2023-08-30 21:58:49,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 735 transitions, 16993 flow [2023-08-30 21:58:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 21:58:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 21:58:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4124 transitions. [2023-08-30 21:58:49,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3495507713171724 [2023-08-30 21:58:49,870 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4124 transitions. [2023-08-30 21:58:49,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4124 transitions. [2023-08-30 21:58:49,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:58:49,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4124 transitions. [2023-08-30 21:58:49,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 121.29411764705883) internal successors, (4124), 34 states have internal predecessors, (4124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:49,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:49,882 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:49,882 INFO L175 Difference]: Start difference. First operand has 412 places, 630 transitions, 14397 flow. Second operand 34 states and 4124 transitions. [2023-08-30 21:58:49,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 735 transitions, 16993 flow [2023-08-30 21:58:50,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 735 transitions, 16627 flow, removed 115 selfloop flow, removed 19 redundant places. [2023-08-30 21:58:50,410 INFO L231 Difference]: Finished difference. Result has 433 places, 652 transitions, 15108 flow [2023-08-30 21:58:50,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=14030, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15108, PETRI_PLACES=433, PETRI_TRANSITIONS=652} [2023-08-30 21:58:50,411 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 412 predicate places. [2023-08-30 21:58:50,412 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 652 transitions, 15108 flow [2023-08-30 21:58:50,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 117.65517241379311) internal successors, (3412), 29 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:50,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:58:50,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:58:50,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 21:58:50,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-30 21:58:50,613 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:58:50,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:58:50,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2036955866, now seen corresponding path program 9 times [2023-08-30 21:58:50,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:58:50,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116017159] [2023-08-30 21:58:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:58:50,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:58:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:58:50,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:50,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:58:50,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116017159] [2023-08-30 21:58:50,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116017159] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:58:50,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975425755] [2023-08-30 21:58:50,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:58:50,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:58:50,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:58:50,837 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:58:50,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 21:58:51,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:58:51,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:58:51,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 21:58:51,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:58:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 21:58:51,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:58:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 21:58:51,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975425755] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:58:51,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:58:51,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-08-30 21:58:51,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625474544] [2023-08-30 21:58:51,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:58:51,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 21:58:51,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:58:51,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 21:58:51,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-30 21:58:51,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 347 [2023-08-30 21:58:51,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 652 transitions, 15108 flow. Second operand has 11 states, 11 states have (on average 139.54545454545453) internal successors, (1535), 11 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:51,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:58:51,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 347 [2023-08-30 21:58:51,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:58:52,529 INFO L130 PetriNetUnfolder]: 1789/3412 cut-off events. [2023-08-30 21:58:52,530 INFO L131 PetriNetUnfolder]: For 92525/92525 co-relation queries the response was YES. [2023-08-30 21:58:52,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32588 conditions, 3412 events. 1789/3412 cut-off events. For 92525/92525 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23104 event pairs, 484 based on Foata normal form. 34/3445 useless extension candidates. Maximal degree in co-relation 32385. Up to 2150 conditions per place. [2023-08-30 21:58:52,573 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 515 selfloop transitions, 154 changer transitions 0/669 dead transitions. [2023-08-30 21:58:52,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 669 transitions, 16527 flow [2023-08-30 21:58:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 21:58:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 21:58:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1154 transitions. [2023-08-30 21:58:52,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41570605187319887 [2023-08-30 21:58:52,574 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1154 transitions. [2023-08-30 21:58:52,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1154 transitions. [2023-08-30 21:58:52,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:58:52,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1154 transitions. [2023-08-30 21:58:52,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.25) internal successors, (1154), 8 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:52,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 347.0) internal successors, (3123), 9 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:52,577 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 347.0) internal successors, (3123), 9 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:52,577 INFO L175 Difference]: Start difference. First operand has 433 places, 652 transitions, 15108 flow. Second operand 8 states and 1154 transitions. [2023-08-30 21:58:52,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 669 transitions, 16527 flow [2023-08-30 21:58:53,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 669 transitions, 16264 flow, removed 71 selfloop flow, removed 24 redundant places. [2023-08-30 21:58:53,152 INFO L231 Difference]: Finished difference. Result has 411 places, 648 transitions, 15133 flow [2023-08-30 21:58:53,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=14589, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15133, PETRI_PLACES=411, PETRI_TRANSITIONS=648} [2023-08-30 21:58:53,153 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 390 predicate places. [2023-08-30 21:58:53,153 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 648 transitions, 15133 flow [2023-08-30 21:58:53,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.54545454545453) internal successors, (1535), 11 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:53,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:58:53,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:58:53,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 21:58:53,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:58:53,354 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:58:53,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:58:53,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1984941564, now seen corresponding path program 10 times [2023-08-30 21:58:53,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:58:53,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567300204] [2023-08-30 21:58:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:58:53,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:58:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:58:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:53,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:58:53,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567300204] [2023-08-30 21:58:53,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567300204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:58:53,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065459654] [2023-08-30 21:58:53,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:58:53,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:58:53,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:58:53,577 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:58:53,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 21:58:53,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:58:53,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:58:53,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 21:58:53,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:58:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:53,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:58:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:54,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065459654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:58:54,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:58:54,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-30 21:58:54,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007376631] [2023-08-30 21:58:54,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:58:54,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:58:54,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:58:54,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:58:54,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-30 21:58:54,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-30 21:58:54,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 648 transitions, 15133 flow. Second operand has 18 states, 18 states have (on average 137.88888888888889) internal successors, (2482), 18 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:54,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:58:54,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-30 21:58:54,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:58:58,034 INFO L130 PetriNetUnfolder]: 2063/4008 cut-off events. [2023-08-30 21:58:58,034 INFO L131 PetriNetUnfolder]: For 103834/103834 co-relation queries the response was YES. [2023-08-30 21:58:58,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37734 conditions, 4008 events. 2063/4008 cut-off events. For 103834/103834 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28590 event pairs, 398 based on Foata normal form. 58/4065 useless extension candidates. Maximal degree in co-relation 37506. Up to 2197 conditions per place. [2023-08-30 21:58:58,083 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 546 selfloop transitions, 308 changer transitions 2/856 dead transitions. [2023-08-30 21:58:58,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 856 transitions, 19797 flow [2023-08-30 21:58:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 21:58:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 21:58:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5246 transitions. [2023-08-30 21:58:58,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40859880052963626 [2023-08-30 21:58:58,087 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5246 transitions. [2023-08-30 21:58:58,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5246 transitions. [2023-08-30 21:58:58,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:58:58,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5246 transitions. [2023-08-30 21:58:58,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 141.78378378378378) internal successors, (5246), 37 states have internal predecessors, (5246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:58,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:58,096 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:58,096 INFO L175 Difference]: Start difference. First operand has 411 places, 648 transitions, 15133 flow. Second operand 37 states and 5246 transitions. [2023-08-30 21:58:58,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 856 transitions, 19797 flow [2023-08-30 21:58:58,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 856 transitions, 19296 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-08-30 21:58:58,866 INFO L231 Difference]: Finished difference. Result has 456 places, 734 transitions, 17686 flow [2023-08-30 21:58:58,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=14667, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17686, PETRI_PLACES=456, PETRI_TRANSITIONS=734} [2023-08-30 21:58:58,867 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 435 predicate places. [2023-08-30 21:58:58,867 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 734 transitions, 17686 flow [2023-08-30 21:58:58,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.88888888888889) internal successors, (2482), 18 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:58,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:58:58,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:58:58,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 21:58:59,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:58:59,068 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:58:59,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:58:59,068 INFO L85 PathProgramCache]: Analyzing trace with hash -102502875, now seen corresponding path program 11 times [2023-08-30 21:58:59,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:58:59,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555058593] [2023-08-30 21:58:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:58:59,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:58:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:59:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:59:00,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:59:00,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555058593] [2023-08-30 21:59:00,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555058593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:59:00,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284210854] [2023-08-30 21:59:00,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:59:00,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:59:00,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:59:00,090 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:59:00,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 21:59:00,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:59:00,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:59:00,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 21:59:00,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:59:00,545 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:59:00,560 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2023-08-30 21:59:00,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 31 [2023-08-30 21:59:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:00,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:59:01,311 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-30 21:59:01,311 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-30 21:59:01,468 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-30 21:59:01,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-30 21:59:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:01,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284210854] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:59:01,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:59:01,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 27 [2023-08-30 21:59:01,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056995341] [2023-08-30 21:59:01,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:59:01,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:59:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:59:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:59:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:59:07,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 347 [2023-08-30 21:59:07,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 734 transitions, 17686 flow. Second operand has 29 states, 29 states have (on average 113.75862068965517) internal successors, (3299), 29 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:07,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:59:07,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 347 [2023-08-30 21:59:07,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:59:11,266 INFO L130 PetriNetUnfolder]: 2133/4127 cut-off events. [2023-08-30 21:59:11,266 INFO L131 PetriNetUnfolder]: For 112263/112263 co-relation queries the response was YES. [2023-08-30 21:59:11,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40340 conditions, 4127 events. 2133/4127 cut-off events. For 112263/112263 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 29489 event pairs, 217 based on Foata normal form. 4/4130 useless extension candidates. Maximal degree in co-relation 40097. Up to 3658 conditions per place. [2023-08-30 21:59:11,321 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 703 selfloop transitions, 122 changer transitions 14/839 dead transitions. [2023-08-30 21:59:11,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 839 transitions, 20400 flow [2023-08-30 21:59:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 21:59:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 21:59:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3417 transitions. [2023-08-30 21:59:11,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33956076716684885 [2023-08-30 21:59:11,326 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3417 transitions. [2023-08-30 21:59:11,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3417 transitions. [2023-08-30 21:59:11,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:59:11,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3417 transitions. [2023-08-30 21:59:11,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 117.82758620689656) internal successors, (3417), 29 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:11,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 347.0) internal successors, (10410), 30 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:11,336 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 347.0) internal successors, (10410), 30 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:11,336 INFO L175 Difference]: Start difference. First operand has 456 places, 734 transitions, 17686 flow. Second operand 29 states and 3417 transitions. [2023-08-30 21:59:11,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 839 transitions, 20400 flow [2023-08-30 21:59:12,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 839 transitions, 19619 flow, removed 307 selfloop flow, removed 12 redundant places. [2023-08-30 21:59:12,315 INFO L231 Difference]: Finished difference. Result has 480 places, 756 transitions, 17848 flow [2023-08-30 21:59:12,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=16905, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=17848, PETRI_PLACES=480, PETRI_TRANSITIONS=756} [2023-08-30 21:59:12,316 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 459 predicate places. [2023-08-30 21:59:12,317 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 756 transitions, 17848 flow [2023-08-30 21:59:12,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 113.75862068965517) internal successors, (3299), 29 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:12,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:59:12,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:59:12,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 21:59:12,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:59:12,524 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:59:12,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:59:12,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1211782553, now seen corresponding path program 12 times [2023-08-30 21:59:12,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:59:12,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791418104] [2023-08-30 21:59:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:59:12,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:59:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:59:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:59:13,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:59:13,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791418104] [2023-08-30 21:59:13,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791418104] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:59:13,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032684379] [2023-08-30 21:59:13,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:59:13,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:59:13,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:59:13,449 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) [2023-08-30 21:59:13,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 21:59:13,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 21:59:13,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:59:13,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 21:59:13,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:59:13,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:59:13,863 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-08-30 21:59:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:59:13,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:59:14,498 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-30 21:59:14,499 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-30 21:59:14,661 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-30 21:59:14,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-30 21:59:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:14,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032684379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:59:14,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:59:14,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-08-30 21:59:14,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478657213] [2023-08-30 21:59:14,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:59:14,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 21:59:14,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:59:14,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 21:59:14,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2023-08-30 21:59:17,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 347 [2023-08-30 21:59:17,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 756 transitions, 17848 flow. Second operand has 28 states, 28 states have (on average 115.71428571428571) internal successors, (3240), 28 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:17,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:59:17,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 347 [2023-08-30 21:59:17,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:59:20,216 INFO L130 PetriNetUnfolder]: 2561/4966 cut-off events. [2023-08-30 21:59:20,216 INFO L131 PetriNetUnfolder]: For 126684/126684 co-relation queries the response was YES. [2023-08-30 21:59:20,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47257 conditions, 4966 events. 2561/4966 cut-off events. For 126684/126684 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 37072 event pairs, 282 based on Foata normal form. 4/4969 useless extension candidates. Maximal degree in co-relation 46922. Up to 3871 conditions per place. [2023-08-30 21:59:20,289 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 781 selfloop transitions, 180 changer transitions 12/973 dead transitions. [2023-08-30 21:59:20,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 973 transitions, 23733 flow [2023-08-30 21:59:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 21:59:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 21:59:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3700 transitions. [2023-08-30 21:59:20,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.343962071209445 [2023-08-30 21:59:20,292 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3700 transitions. [2023-08-30 21:59:20,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3700 transitions. [2023-08-30 21:59:20,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:59:20,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3700 transitions. [2023-08-30 21:59:20,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 119.35483870967742) internal successors, (3700), 31 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:20,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:20,300 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:20,300 INFO L175 Difference]: Start difference. First operand has 480 places, 756 transitions, 17848 flow. Second operand 31 states and 3700 transitions. [2023-08-30 21:59:20,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 973 transitions, 23733 flow [2023-08-30 21:59:21,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 973 transitions, 23314 flow, removed 119 selfloop flow, removed 20 redundant places. [2023-08-30 21:59:21,528 INFO L231 Difference]: Finished difference. Result has 499 places, 855 transitions, 20824 flow [2023-08-30 21:59:21,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=17455, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=20824, PETRI_PLACES=499, PETRI_TRANSITIONS=855} [2023-08-30 21:59:21,529 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 478 predicate places. [2023-08-30 21:59:21,530 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 855 transitions, 20824 flow [2023-08-30 21:59:21,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 115.71428571428571) internal successors, (3240), 28 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:21,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:59:21,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:59:21,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-30 21:59:21,730 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,SelfDestructingSolverStorable36 [2023-08-30 21:59:21,731 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:59:21,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:59:21,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1193348527, now seen corresponding path program 13 times [2023-08-30 21:59:21,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:59:21,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820013917] [2023-08-30 21:59:21,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:59:21,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:59:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:59:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:59:22,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:59:22,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820013917] [2023-08-30 21:59:22,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820013917] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:59:22,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741114171] [2023-08-30 21:59:22,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:59:22,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:59:22,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:59:22,817 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) [2023-08-30 21:59:22,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 21:59:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:59:22,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 21:59:22,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:59:23,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:59:23,202 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-08-30 21:59:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:59:23,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:59:23,932 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-30 21:59:23,933 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-30 21:59:24,060 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-30 21:59:24,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-30 21:59:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:24,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741114171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:59:24,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:59:24,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-08-30 21:59:24,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763378931] [2023-08-30 21:59:24,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:59:24,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 21:59:24,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:59:24,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 21:59:24,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2023-08-30 21:59:27,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-08-30 21:59:27,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 855 transitions, 20824 flow. Second operand has 28 states, 28 states have (on average 114.71428571428571) internal successors, (3212), 28 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:27,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:59:27,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-08-30 21:59:27,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:59:30,700 INFO L130 PetriNetUnfolder]: 2638/5144 cut-off events. [2023-08-30 21:59:30,700 INFO L131 PetriNetUnfolder]: For 141988/141988 co-relation queries the response was YES. [2023-08-30 21:59:30,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49999 conditions, 5144 events. 2638/5144 cut-off events. For 141988/141988 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 38955 event pairs, 354 based on Foata normal form. 5/5148 useless extension candidates. Maximal degree in co-relation 49650. Up to 4186 conditions per place. [2023-08-30 21:59:30,776 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 831 selfloop transitions, 169 changer transitions 15/1015 dead transitions. [2023-08-30 21:59:30,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 1015 transitions, 25200 flow [2023-08-30 21:59:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 21:59:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 21:59:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3904 transitions. [2023-08-30 21:59:30,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3409309230634879 [2023-08-30 21:59:30,779 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3904 transitions. [2023-08-30 21:59:30,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3904 transitions. [2023-08-30 21:59:30,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:59:30,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3904 transitions. [2023-08-30 21:59:30,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 118.3030303030303) internal successors, (3904), 33 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:30,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:30,786 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:30,786 INFO L175 Difference]: Start difference. First operand has 499 places, 855 transitions, 20824 flow. Second operand 33 states and 3904 transitions. [2023-08-30 21:59:30,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 1015 transitions, 25200 flow [2023-08-30 21:59:32,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1015 transitions, 24661 flow, removed 221 selfloop flow, removed 14 redundant places. [2023-08-30 21:59:32,028 INFO L231 Difference]: Finished difference. Result has 525 places, 888 transitions, 21721 flow [2023-08-30 21:59:32,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=20474, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=21721, PETRI_PLACES=525, PETRI_TRANSITIONS=888} [2023-08-30 21:59:32,029 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 504 predicate places. [2023-08-30 21:59:32,030 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 888 transitions, 21721 flow [2023-08-30 21:59:32,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 114.71428571428571) internal successors, (3212), 28 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:32,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:59:32,030 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:59:32,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 21:59:32,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 21:59:32,231 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:59:32,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:59:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1218230575, now seen corresponding path program 14 times [2023-08-30 21:59:32,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:59:32,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9028941] [2023-08-30 21:59:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:59:32,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:59:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:59:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:59:33,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:59:33,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9028941] [2023-08-30 21:59:33,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9028941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:59:33,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895584691] [2023-08-30 21:59:33,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:59:33,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:59:33,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:59:33,287 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) [2023-08-30 21:59:33,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 21:59:33,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:59:33,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:59:33,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 21:59:33,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:59:33,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:59:33,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-30 21:59:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:59:33,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:59:34,335 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-30 21:59:34,336 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-30 21:59:34,469 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-30 21:59:34,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-30 21:59:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:34,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895584691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:59:34,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:59:34,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-30 21:59:34,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701380301] [2023-08-30 21:59:34,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:59:34,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 21:59:34,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:59:34,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 21:59:34,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-08-30 21:59:37,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-08-30 21:59:37,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 888 transitions, 21721 flow. Second operand has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:37,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:59:37,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-08-30 21:59:37,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:59:40,964 INFO L130 PetriNetUnfolder]: 2659/5179 cut-off events. [2023-08-30 21:59:40,964 INFO L131 PetriNetUnfolder]: For 147646/147646 co-relation queries the response was YES. [2023-08-30 21:59:41,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50772 conditions, 5179 events. 2659/5179 cut-off events. For 147646/147646 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39206 event pairs, 295 based on Foata normal form. 5/5183 useless extension candidates. Maximal degree in co-relation 50407. Up to 4624 conditions per place. [2023-08-30 21:59:41,043 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 828 selfloop transitions, 145 changer transitions 14/987 dead transitions. [2023-08-30 21:59:41,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 987 transitions, 24501 flow [2023-08-30 21:59:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 21:59:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 21:59:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3912 transitions. [2023-08-30 21:59:41,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34162955200419176 [2023-08-30 21:59:41,046 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3912 transitions. [2023-08-30 21:59:41,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3912 transitions. [2023-08-30 21:59:41,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:59:41,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3912 transitions. [2023-08-30 21:59:41,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 118.54545454545455) internal successors, (3912), 33 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:41,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:41,053 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:41,053 INFO L175 Difference]: Start difference. First operand has 525 places, 888 transitions, 21721 flow. Second operand 33 states and 3912 transitions. [2023-08-30 21:59:41,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 987 transitions, 24501 flow [2023-08-30 21:59:42,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 987 transitions, 24181 flow, removed 72 selfloop flow, removed 19 redundant places. [2023-08-30 21:59:42,643 INFO L231 Difference]: Finished difference. Result has 543 places, 899 transitions, 22097 flow [2023-08-30 21:59:42,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=21401, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=22097, PETRI_PLACES=543, PETRI_TRANSITIONS=899} [2023-08-30 21:59:42,644 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 522 predicate places. [2023-08-30 21:59:42,645 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 899 transitions, 22097 flow [2023-08-30 21:59:42,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:42,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:59:42,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:59:42,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 21:59:42,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 21:59:42,846 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:59:42,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:59:42,846 INFO L85 PathProgramCache]: Analyzing trace with hash -259290172, now seen corresponding path program 15 times [2023-08-30 21:59:42,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:59:42,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658158164] [2023-08-30 21:59:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:59:42,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:59:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:59:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:43,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:59:43,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658158164] [2023-08-30 21:59:43,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658158164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:59:43,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064081801] [2023-08-30 21:59:43,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:59:43,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:59:43,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:59:43,019 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) [2023-08-30 21:59:43,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 21:59:43,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:59:43,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:59:43,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:59:43,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:59:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:43,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:00:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 22:00:49,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064081801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:00:49,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:00:49,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-30 22:00:49,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688317970] [2023-08-30 22:00:49,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:00:49,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 22:00:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:00:49,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 22:00:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-30 22:00:49,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-30 22:00:49,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 899 transitions, 22097 flow. Second operand has 18 states, 18 states have (on average 137.66666666666666) internal successors, (2478), 18 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:00:49,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:00:49,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-30 22:00:49,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:00:55,016 INFO L130 PetriNetUnfolder]: 2661/5065 cut-off events. [2023-08-30 22:00:55,016 INFO L131 PetriNetUnfolder]: For 156822/156822 co-relation queries the response was YES. [2023-08-30 22:00:55,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51104 conditions, 5065 events. 2661/5065 cut-off events. For 156822/156822 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 37317 event pairs, 367 based on Foata normal form. 114/5178 useless extension candidates. Maximal degree in co-relation 50856. Up to 2022 conditions per place. [2023-08-30 22:00:55,237 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 500 selfloop transitions, 536 changer transitions 0/1036 dead transitions. [2023-08-30 22:00:55,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1036 transitions, 25911 flow [2023-08-30 22:00:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 22:00:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 22:00:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5242 transitions. [2023-08-30 22:00:55,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082872497858089 [2023-08-30 22:00:55,240 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5242 transitions. [2023-08-30 22:00:55,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5242 transitions. [2023-08-30 22:00:55,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:00:55,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5242 transitions. [2023-08-30 22:00:55,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 141.67567567567568) internal successors, (5242), 37 states have internal predecessors, (5242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:00:55,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:00:55,254 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:00:55,254 INFO L175 Difference]: Start difference. First operand has 543 places, 899 transitions, 22097 flow. Second operand 37 states and 5242 transitions. [2023-08-30 22:00:55,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1036 transitions, 25911 flow [2023-08-30 22:00:56,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1036 transitions, 25455 flow, removed 118 selfloop flow, removed 28 redundant places. [2023-08-30 22:00:56,620 INFO L231 Difference]: Finished difference. Result has 556 places, 942 transitions, 24248 flow [2023-08-30 22:00:56,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=21276, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=24248, PETRI_PLACES=556, PETRI_TRANSITIONS=942} [2023-08-30 22:00:56,621 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 535 predicate places. [2023-08-30 22:00:56,621 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 942 transitions, 24248 flow [2023-08-30 22:00:56,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.66666666666666) internal successors, (2478), 18 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:00:56,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:00:56,622 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:00:56,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 22:00:56,822 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,SelfDestructingSolverStorable39 [2023-08-30 22:00:56,822 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:00:56,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:00:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1493905089, now seen corresponding path program 12 times [2023-08-30 22:00:56,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:00:56,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949643597] [2023-08-30 22:00:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:00:56,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:00:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:00:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 22:00:57,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:00:57,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949643597] [2023-08-30 22:00:57,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949643597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:00:57,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621386885] [2023-08-30 22:00:57,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 22:00:57,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:00:57,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:00:57,054 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) [2023-08-30 22:00:57,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 22:00:57,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 22:00:57,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:00:57,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 22:00:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:00:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 22:00:57,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:04:43,377 WARN L222 SmtUtils]: Spent 3.75m on a formula simplification. DAG size of input: 4544 DAG size of output: 4318 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15