./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-4.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 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 15:00:55,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 15:00:55,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 15:00:56,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 15:00:56,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 15:00:56,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 15:00:56,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 15:00:56,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 15:00:56,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 15:00:56,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 15:00:56,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 15:00:56,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 15:00:56,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 15:00:56,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 15:00:56,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 15:00:56,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 15:00:56,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 15:00:56,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 15:00:56,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 15:00:56,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 15:00:56,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 15:00:56,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 15:00:56,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 15:00:56,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 15:00:56,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 15:00:56,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 15:00:56,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 15:00:56,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 15:00:56,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 15:00:56,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 15:00:56,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 15:00:56,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 15:00:56,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 15:00:56,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 15:00:56,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 15:00:56,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 15:00:56,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 15:00:56,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 15:00:56,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 15:00:56,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 15:00:56,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 15:00:56,079 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 15:00:56,103 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 15:00:56,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 15:00:56,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 15:00:56,104 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 15:00:56,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 15:00:56,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 15:00:56,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 15:00:56,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 15:00:56,105 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 15:00:56,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 15:00:56,106 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 15:00:56,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 15:00:56,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 15:00:56,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 15:00:56,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 15:00:56,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 15:00:56,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 15:00:56,107 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 15:00:56,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 15:00:56,107 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 15:00:56,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 15:00:56,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 15:00:56,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 15:00:56,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 15:00:56,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 15:00:56,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 15:00:56,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 15:00:56,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 15:00:56,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 15:00:56,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 15:00:56,109 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 15:00:56,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 15:00:56,109 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 15:00:56,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 15:00:56,109 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 15:00:56,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 15:00:56,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 15:00:56,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 15:00:56,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 15:00:56,379 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 15:00:56,379 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 15:00:56,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2023-09-01 15:00:57,365 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 15:00:57,536 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 15:00:57,536 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2023-09-01 15:00:57,541 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa23fa0f/a553904b3f524e59916cba15b9df6bc1/FLAG7c6a2e1d9 [2023-09-01 15:00:57,549 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa23fa0f/a553904b3f524e59916cba15b9df6bc1 [2023-09-01 15:00:57,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 15:00:57,551 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 15:00:57,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 15:00:57,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 15:00:57,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 15:00:57,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10cdc986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57, skipping insertion in model container [2023-09-01 15:00:57,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 15:00:57,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 15:00:57,662 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-4.wvr.c[2808,2821] [2023-09-01 15:00:57,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 15:00:57,672 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 15:00:57,692 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-4.wvr.c[2808,2821] [2023-09-01 15:00:57,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 15:00:57,702 INFO L208 MainTranslator]: Completed translation [2023-09-01 15:00:57,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57 WrapperNode [2023-09-01 15:00:57,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 15:00:57,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 15:00:57,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 15:00:57,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 15:00:57,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,733 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 186 [2023-09-01 15:00:57,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 15:00:57,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 15:00:57,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 15:00:57,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 15:00:57,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,753 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 15:00:57,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 15:00:57,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 15:00:57,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 15:00:57,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57" (1/1) ... [2023-09-01 15:00:57,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 15:00:57,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:57,779 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) [2023-09-01 15:00:57,789 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 [2023-09-01 15:00:57,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 15:00:57,804 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 15:00:57,804 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 15:00:57,804 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 15:00:57,804 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 15:00:57,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 15:00:57,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 15:00:57,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 15:00:57,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 15:00:57,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 15:00:57,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 15:00:57,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 15:00:57,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 15:00:57,807 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 15:00:57,898 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 15:00:57,921 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 15:00:58,136 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 15:00:58,143 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 15:00:58,143 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 15:00:58,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:00:58 BoogieIcfgContainer [2023-09-01 15:00:58,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 15:00:58,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 15:00:58,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 15:00:58,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 15:00:58,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:00:57" (1/3) ... [2023-09-01 15:00:58,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df3fb98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:00:58, skipping insertion in model container [2023-09-01 15:00:58,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:00:57" (2/3) ... [2023-09-01 15:00:58,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df3fb98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:00:58, skipping insertion in model container [2023-09-01 15:00:58,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:00:58" (3/3) ... [2023-09-01 15:00:58,150 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2023-09-01 15:00:58,155 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 15:00:58,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 15:00:58,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 15:00:58,161 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 15:00:58,269 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 15:00:58,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 222 transitions, 460 flow [2023-09-01 15:00:58,378 INFO L130 PetriNetUnfolder]: 21/220 cut-off events. [2023-09-01 15:00:58,378 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:00:58,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 220 events. 21/220 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 376 event pairs, 0 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2023-09-01 15:00:58,385 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 222 transitions, 460 flow [2023-09-01 15:00:58,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 212 transitions, 436 flow [2023-09-01 15:00:58,394 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 15:00:58,405 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 212 transitions, 436 flow [2023-09-01 15:00:58,406 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 212 transitions, 436 flow [2023-09-01 15:00:58,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 212 transitions, 436 flow [2023-09-01 15:00:58,455 INFO L130 PetriNetUnfolder]: 21/212 cut-off events. [2023-09-01 15:00:58,460 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:00:58,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 212 events. 21/212 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 357 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2023-09-01 15:00:58,467 INFO L119 LiptonReduction]: Number of co-enabled transitions 5492 [2023-09-01 15:01:06,520 INFO L134 LiptonReduction]: Checked pairs total: 5306 [2023-09-01 15:01:06,520 INFO L136 LiptonReduction]: Total number of compositions: 254 [2023-09-01 15:01:06,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 15:01:06,533 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;@cf8289e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 15:01:06,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 15:01:06,548 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-09-01 15:01:06,548 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:01:06,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:06,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:06,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:06,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:06,553 INFO L85 PathProgramCache]: Analyzing trace with hash 23434036, now seen corresponding path program 1 times [2023-09-01 15:01:06,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:06,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883351544] [2023-09-01 15:01:06,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:06,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:01:06,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:06,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883351544] [2023-09-01 15:01:06,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883351544] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:01:06,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:01:06,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 15:01:06,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164746749] [2023-09-01 15:01:06,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:01:06,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:01:06,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:06,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:01:06,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:01:06,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 476 [2023-09-01 15:01:06,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:06,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:06,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 476 [2023-09-01 15:01:06,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:07,036 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-09-01 15:01:07,036 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 15:01:07,036 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 201 event pairs, 19 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-09-01 15:01:07,037 INFO L137 encePairwiseOnDemand]: 473/476 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-09-01 15:01:07,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-09-01 15:01:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:01:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:01:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-09-01 15:01:07,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42787114845938373 [2023-09-01 15:01:07,060 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-09-01 15:01:07,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-09-01 15:01:07,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:07,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-09-01 15:01:07,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:07,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:07,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:07,074 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 611 transitions. [2023-09-01 15:01:07,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-09-01 15:01:07,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 15:01:07,078 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-09-01 15:01:07,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, 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} [2023-09-01 15:01:07,084 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-09-01 15:01:07,085 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-09-01 15:01:07,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:07,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:07,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:07,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 15:01:07,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:07,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:07,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1325837020, now seen corresponding path program 1 times [2023-09-01 15:01:07,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:07,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695812790] [2023-09-01 15:01:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:07,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:07,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:07,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695812790] [2023-09-01 15:01:07,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695812790] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:01:07,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:01:07,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:01:07,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110645461] [2023-09-01 15:01:07,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:01:07,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:01:07,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:07,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:01:07,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:01:07,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 476 [2023-09-01 15:01:07,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:07,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:07,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 476 [2023-09-01 15:01:07,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:07,612 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2023-09-01 15:01:07,612 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:01:07,612 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 369 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. [2023-09-01 15:01:07,613 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-09-01 15:01:07,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-09-01 15:01:07,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:01:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:01:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 980 transitions. [2023-09-01 15:01:07,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2023-09-01 15:01:07,621 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 980 transitions. [2023-09-01 15:01:07,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 980 transitions. [2023-09-01 15:01:07,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:07,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 980 transitions. [2023-09-01 15:01:07,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:07,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:07,635 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:07,635 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 980 transitions. [2023-09-01 15:01:07,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-09-01 15:01:07,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 15:01:07,637 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-09-01 15:01:07,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, 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} [2023-09-01 15:01:07,637 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-09-01 15:01:07,637 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-09-01 15:01:07,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:07,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:07,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:07,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 15:01:07,639 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:07,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:07,639 INFO L85 PathProgramCache]: Analyzing trace with hash -777538468, now seen corresponding path program 2 times [2023-09-01 15:01:07,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:07,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699402705] [2023-09-01 15:01:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:07,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:07,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:07,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699402705] [2023-09-01 15:01:07,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699402705] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:01:07,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:01:07,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:01:07,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872312693] [2023-09-01 15:01:07,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:01:07,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:01:07,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:07,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:01:07,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:01:08,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 476 [2023-09-01 15:01:08,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:08,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 476 [2023-09-01 15:01:08,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:08,145 INFO L130 PetriNetUnfolder]: 109/198 cut-off events. [2023-09-01 15:01:08,146 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-09-01 15:01:08,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 198 events. 109/198 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 591 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. [2023-09-01 15:01:08,147 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 40 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2023-09-01 15:01:08,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 292 flow [2023-09-01 15:01:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 15:01:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 15:01:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1152 transitions. [2023-09-01 15:01:08,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40336134453781514 [2023-09-01 15:01:08,150 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1152 transitions. [2023-09-01 15:01:08,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1152 transitions. [2023-09-01 15:01:08,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:08,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1152 transitions. [2023-09-01 15:01:08,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 476.0) internal successors, (3332), 7 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,164 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 476.0) internal successors, (3332), 7 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,165 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 6 states and 1152 transitions. [2023-09-01 15:01:08,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 292 flow [2023-09-01 15:01:08,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 275 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 15:01:08,168 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 163 flow [2023-09-01 15:01:08,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, 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} [2023-09-01 15:01:08,169 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-09-01 15:01:08,172 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 163 flow [2023-09-01 15:01:08,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:08,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:08,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 15:01:08,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:08,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:08,175 INFO L85 PathProgramCache]: Analyzing trace with hash 579336880, now seen corresponding path program 3 times [2023-09-01 15:01:08,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:08,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006088737] [2023-09-01 15:01:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:08,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:08,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:08,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006088737] [2023-09-01 15:01:08,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006088737] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:01:08,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:01:08,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:01:08,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134862488] [2023-09-01 15:01:08,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:01:08,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:01:08,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:01:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:01:08,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 476 [2023-09-01 15:01:08,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:08,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 476 [2023-09-01 15:01:08,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:08,611 INFO L130 PetriNetUnfolder]: 119/214 cut-off events. [2023-09-01 15:01:08,614 INFO L131 PetriNetUnfolder]: For 334/334 co-relation queries the response was YES. [2023-09-01 15:01:08,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 214 events. 119/214 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 684 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. [2023-09-01 15:01:08,615 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 40 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-09-01 15:01:08,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 376 flow [2023-09-01 15:01:08,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:01:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:01:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 966 transitions. [2023-09-01 15:01:08,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40588235294117647 [2023-09-01 15:01:08,618 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 966 transitions. [2023-09-01 15:01:08,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 966 transitions. [2023-09-01 15:01:08,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:08,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 966 transitions. [2023-09-01 15:01:08,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,627 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,627 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 163 flow. Second operand 5 states and 966 transitions. [2023-09-01 15:01:08,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 376 flow [2023-09-01 15:01:08,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 362 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-09-01 15:01:08,634 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 255 flow [2023-09-01 15:01:08,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, 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} [2023-09-01 15:01:08,636 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-09-01 15:01:08,636 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 255 flow [2023-09-01 15:01:08,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:08,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:08,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 15:01:08,637 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:08,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:08,637 INFO L85 PathProgramCache]: Analyzing trace with hash -149932496, now seen corresponding path program 4 times [2023-09-01 15:01:08,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:08,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335450844] [2023-09-01 15:01:08,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:08,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:08,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:08,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335450844] [2023-09-01 15:01:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335450844] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:01:08,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:01:08,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:01:08,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594699887] [2023-09-01 15:01:08,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:01:08,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:01:08,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:08,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:01:08,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:01:08,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 476 [2023-09-01 15:01:08,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:08,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 476 [2023-09-01 15:01:08,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:08,939 INFO L130 PetriNetUnfolder]: 115/210 cut-off events. [2023-09-01 15:01:08,939 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-09-01 15:01:08,939 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 664 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. [2023-09-01 15:01:08,940 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 33 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-09-01 15:01:08,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 430 flow [2023-09-01 15:01:08,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:01:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:01:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 960 transitions. [2023-09-01 15:01:08,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40336134453781514 [2023-09-01 15:01:08,944 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 960 transitions. [2023-09-01 15:01:08,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 960 transitions. [2023-09-01 15:01:08,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:08,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 960 transitions. [2023-09-01 15:01:08,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,949 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,949 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 255 flow. Second operand 5 states and 960 transitions. [2023-09-01 15:01:08,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 430 flow [2023-09-01 15:01:08,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 414 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 15:01:08,952 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 347 flow [2023-09-01 15:01:08,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, 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} [2023-09-01 15:01:08,954 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-09-01 15:01:08,954 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 347 flow [2023-09-01 15:01:08,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:08,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:08,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:08,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 15:01:08,955 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:08,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:08,956 INFO L85 PathProgramCache]: Analyzing trace with hash -861950526, now seen corresponding path program 5 times [2023-09-01 15:01:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:08,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660813654] [2023-09-01 15:01:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:08,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:09,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:09,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660813654] [2023-09-01 15:01:09,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660813654] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:01:09,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:01:09,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:01:09,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105951420] [2023-09-01 15:01:09,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:01:09,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:01:09,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:09,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:01:09,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:01:09,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 476 [2023-09-01 15:01:09,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:09,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 476 [2023-09-01 15:01:09,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:09,393 INFO L130 PetriNetUnfolder]: 116/213 cut-off events. [2023-09-01 15:01:09,393 INFO L131 PetriNetUnfolder]: For 616/616 co-relation queries the response was YES. [2023-09-01 15:01:09,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 213 events. 116/213 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 688 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. [2023-09-01 15:01:09,394 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 41 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2023-09-01 15:01:09,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 503 flow [2023-09-01 15:01:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:01:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:01:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 979 transitions. [2023-09-01 15:01:09,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134453781512603 [2023-09-01 15:01:09,397 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 979 transitions. [2023-09-01 15:01:09,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 979 transitions. [2023-09-01 15:01:09,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:09,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 979 transitions. [2023-09-01 15:01:09,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.8) internal successors, (979), 5 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,402 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,402 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 347 flow. Second operand 5 states and 979 transitions. [2023-09-01 15:01:09,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 503 flow [2023-09-01 15:01:09,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 460 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-09-01 15:01:09,406 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 344 flow [2023-09-01 15:01:09,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, 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} [2023-09-01 15:01:09,408 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-09-01 15:01:09,408 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 344 flow [2023-09-01 15:01:09,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:09,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:09,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 15:01:09,410 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:09,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:09,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1591219902, now seen corresponding path program 6 times [2023-09-01 15:01:09,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:09,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051877406] [2023-09-01 15:01:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:09,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:09,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:09,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051877406] [2023-09-01 15:01:09,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051877406] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:01:09,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:01:09,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:01:09,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414055656] [2023-09-01 15:01:09,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:01:09,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:01:09,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:01:09,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:01:09,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 476 [2023-09-01 15:01:09,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:09,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 476 [2023-09-01 15:01:09,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:09,762 INFO L130 PetriNetUnfolder]: 115/206 cut-off events. [2023-09-01 15:01:09,763 INFO L131 PetriNetUnfolder]: For 707/707 co-relation queries the response was YES. [2023-09-01 15:01:09,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 206 events. 115/206 cut-off events. For 707/707 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 636 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. [2023-09-01 15:01:09,764 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 34 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2023-09-01 15:01:09,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 472 flow [2023-09-01 15:01:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:01:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:01:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 975 transitions. [2023-09-01 15:01:09,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096638655462185 [2023-09-01 15:01:09,767 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 975 transitions. [2023-09-01 15:01:09,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 975 transitions. [2023-09-01 15:01:09,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:09,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 975 transitions. [2023-09-01 15:01:09,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,772 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,772 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 344 flow. Second operand 5 states and 975 transitions. [2023-09-01 15:01:09,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 472 flow [2023-09-01 15:01:09,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 438 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 15:01:09,775 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 350 flow [2023-09-01 15:01:09,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, 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} [2023-09-01 15:01:09,776 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-09-01 15:01:09,776 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 350 flow [2023-09-01 15:01:09,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:09,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:09,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 15:01:09,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:09,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:09,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1586382571, now seen corresponding path program 1 times [2023-09-01 15:01:09,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:09,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411238825] [2023-09-01 15:01:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:09,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:10,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:10,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411238825] [2023-09-01 15:01:10,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411238825] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:01:10,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890272993] [2023-09-01 15:01:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:10,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:10,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:01:10,062 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) [2023-09-01 15:01:10,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 15:01:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 15:01:10,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:01:10,280 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 [2023-09-01 15:01:10,319 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 [2023-09-01 15:01:10,351 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 [2023-09-01 15:01:11,216 INFO L321 Elim1Store]: treesize reduction 159, result has 14.1 percent of original size [2023-09-01 15:01:11,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 638 treesize of output 387 [2023-09-01 15:01:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:01:12,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:01:18,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:18,686 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 568 treesize of output 328 [2023-09-01 15:01:18,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:18,740 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 1744 treesize of output 1536 [2023-09-01 15:01:18,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:18,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 393 treesize of output 269 [2023-09-01 15:01:19,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:19,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 274 treesize of output 276 [2023-09-01 15:01:24,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:24,766 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 328 treesize of output 196 [2023-09-01 15:01:24,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:24,801 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 1090 treesize of output 982 [2023-09-01 15:01:24,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:24,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 245 treesize of output 185 [2023-09-01 15:01:25,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:25,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 178 treesize of output 190 [2023-09-01 15:01:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:01:25,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890272993] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:01:25,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:01:25,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-09-01 15:01:25,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466501065] [2023-09-01 15:01:25,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:01:25,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 15:01:25,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 15:01:25,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=237, Unknown=4, NotChecked=0, Total=306 [2023-09-01 15:01:27,740 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] [2023-09-01 15:01:30,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:32,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:35,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:37,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:40,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:43,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:43,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 476 [2023-09-01 15:01:43,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 350 flow. Second operand has 18 states, 18 states have (on average 87.66666666666667) internal successors, (1578), 18 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:43,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:43,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 476 [2023-09-01 15:01:43,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:51,609 WARN L222 SmtUtils]: Spent 8.36s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:02:00,500 WARN L222 SmtUtils]: Spent 8.42s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:02:02,676 INFO L130 PetriNetUnfolder]: 403/726 cut-off events. [2023-09-01 15:02:02,676 INFO L131 PetriNetUnfolder]: For 1970/1970 co-relation queries the response was YES. [2023-09-01 15:02:02,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2968 conditions, 726 events. 403/726 cut-off events. For 1970/1970 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3334 event pairs, 22 based on Foata normal form. 8/608 useless extension candidates. Maximal degree in co-relation 2363. Up to 221 conditions per place. [2023-09-01 15:02:02,679 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 83 selfloop transitions, 41 changer transitions 79/203 dead transitions. [2023-09-01 15:02:02,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 203 transitions, 1636 flow [2023-09-01 15:02:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 15:02:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 15:02:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2128 transitions. [2023-09-01 15:02:02,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.19437340153452684 [2023-09-01 15:02:02,686 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2128 transitions. [2023-09-01 15:02:02,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2128 transitions. [2023-09-01 15:02:02,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:02:02,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2128 transitions. [2023-09-01 15:02:02,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 92.52173913043478) internal successors, (2128), 23 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:02,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 476.0) internal successors, (11424), 24 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:02,700 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 476.0) internal successors, (11424), 24 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:02,700 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 350 flow. Second operand 23 states and 2128 transitions. [2023-09-01 15:02:02,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 203 transitions, 1636 flow [2023-09-01 15:02:02,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 203 transitions, 1558 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 15:02:02,707 INFO L231 Difference]: Finished difference. Result has 85 places, 66 transitions, 640 flow [2023-09-01 15:02:02,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=640, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2023-09-01 15:02:02,707 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 64 predicate places. [2023-09-01 15:02:02,708 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 640 flow [2023-09-01 15:02:02,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 87.66666666666667) internal successors, (1578), 18 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:02,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:02:02,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:02:02,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 15:02:02,913 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 [2023-09-01 15:02:02,914 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:02:02,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:02:02,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1428326089, now seen corresponding path program 1 times [2023-09-01 15:02:02,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:02:02,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677592280] [2023-09-01 15:02:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:02:02,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:02:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:02:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:02:03,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:02:03,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677592280] [2023-09-01 15:02:03,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677592280] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:02:03,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520337310] [2023-09-01 15:02:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:02:03,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:02:03,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:02:03,091 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) [2023-09-01 15:02:03,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 15:02:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:02:03,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 15:02:03,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:02:03,723 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-09-01 15:02:03,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 327 treesize of output 306 [2023-09-01 15:02:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:02:03,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:02:08,499 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-09-01 15:02:08,500 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 96 treesize of output 91 [2023-09-01 15:02:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:02:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520337310] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:02:09,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:02:09,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-09-01 15:02:09,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338839296] [2023-09-01 15:02:09,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:02:09,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 15:02:09,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:02:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 15:02:09,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-09-01 15:02:22,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 476 [2023-09-01 15:02:22,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 640 flow. Second operand has 20 states, 20 states have (on average 158.4) internal successors, (3168), 20 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:22,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:02:22,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 476 [2023-09-01 15:02:22,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:02:37,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 15:02:43,045 INFO L130 PetriNetUnfolder]: 673/1231 cut-off events. [2023-09-01 15:02:43,046 INFO L131 PetriNetUnfolder]: For 5640/5640 co-relation queries the response was YES. [2023-09-01 15:02:43,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5806 conditions, 1231 events. 673/1231 cut-off events. For 5640/5640 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6466 event pairs, 41 based on Foata normal form. 19/1247 useless extension candidates. Maximal degree in co-relation 5669. Up to 337 conditions per place. [2023-09-01 15:02:43,052 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 140 selfloop transitions, 105 changer transitions 78/323 dead transitions. [2023-09-01 15:02:43,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 323 transitions, 3008 flow [2023-09-01 15:02:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 15:02:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 15:02:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6498 transitions. [2023-09-01 15:02:43,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.341281512605042 [2023-09-01 15:02:43,073 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6498 transitions. [2023-09-01 15:02:43,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6498 transitions. [2023-09-01 15:02:43,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:02:43,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6498 transitions. [2023-09-01 15:02:43,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 162.45) internal successors, (6498), 40 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:43,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 476.0) internal successors, (19516), 41 states have internal predecessors, (19516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:43,108 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 476.0) internal successors, (19516), 41 states have internal predecessors, (19516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:43,108 INFO L175 Difference]: Start difference. First operand has 85 places, 66 transitions, 640 flow. Second operand 40 states and 6498 transitions. [2023-09-01 15:02:43,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 323 transitions, 3008 flow [2023-09-01 15:02:43,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 323 transitions, 2748 flow, removed 86 selfloop flow, removed 10 redundant places. [2023-09-01 15:02:43,129 INFO L231 Difference]: Finished difference. Result has 127 places, 138 transitions, 1689 flow [2023-09-01 15:02:43,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1689, PETRI_PLACES=127, PETRI_TRANSITIONS=138} [2023-09-01 15:02:43,130 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 106 predicate places. [2023-09-01 15:02:43,131 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 138 transitions, 1689 flow [2023-09-01 15:02:43,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 158.4) internal successors, (3168), 20 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:43,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:02:43,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:02:43,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 15:02:43,334 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 [2023-09-01 15:02:43,335 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:02:43,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:02:43,335 INFO L85 PathProgramCache]: Analyzing trace with hash 662480889, now seen corresponding path program 2 times [2023-09-01 15:02:43,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:02:43,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783027017] [2023-09-01 15:02:43,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:02:43,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:02:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:02:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:02:43,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:02:43,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783027017] [2023-09-01 15:02:43,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783027017] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:02:43,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877324624] [2023-09-01 15:02:43,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:02:43,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:02:43,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:02:43,520 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) [2023-09-01 15:02:43,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 15:02:43,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:02:43,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:02:43,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 15:02:43,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:02:44,076 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-09-01 15:02:44,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 327 treesize of output 306 [2023-09-01 15:02:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:02:44,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:02:51,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:02:51,903 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 460 treesize of output 341 [2023-09-01 15:09:08,780 WARN L222 SmtUtils]: Spent 6.16m on a formula simplification. DAG size of input: 5060 DAG size of output: 4351 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15