./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-5.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-5.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 c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e --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 14:57:23,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:57:23,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:57:23,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:57:23,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:57:23,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:57:23,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:57:23,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:57:23,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:57:23,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:57:23,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:57:23,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:57:23,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:57:23,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:57:23,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:57:23,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:57:23,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:57:23,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:57:23,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:57:23,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:57:23,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:57:23,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:57:23,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:57:23,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:57:23,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:57:23,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:57:23,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:57:23,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:57:23,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:57:23,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:57:23,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:57:23,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:57:23,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:57:23,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:57:23,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:57:23,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:57:23,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:57:23,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:57:23,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:57:23,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:57:23,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:57:23,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:57:23,945 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:57:23,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:57:23,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:57:23,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:57:23,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:57:23,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:57:23,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:57:23,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:57:23,948 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:57:23,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:57:23,949 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:57:23,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:57:23,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:57:23,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:57:23,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:57:23,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:57:23,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:57:23,950 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:57:23,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:57:23,950 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:57:23,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:57:23,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:57:23,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:57:23,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:57:23,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:57:23,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:57:23,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:57:23,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:57:23,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:57:23,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:57:23,952 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:57:23,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:57:23,952 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:57:23,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:57:23,953 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:57:23,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:57:24,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:57:24,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:57:24,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:57:24,238 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:57:24,238 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:57:24,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-09-01 14:57:25,188 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:57:25,382 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:57:25,383 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-09-01 14:57:25,387 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb3a19790/3981162826a449c59e0d3380dc1352b5/FLAG591f43046 [2023-09-01 14:57:25,397 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb3a19790/3981162826a449c59e0d3380dc1352b5 [2023-09-01 14:57:25,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:57:25,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:57:25,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:57:25,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:57:25,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:57:25,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d511ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25, skipping insertion in model container [2023-09-01 14:57:25,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:57:25,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:57:25,591 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-5.wvr.c[2644,2657] [2023-09-01 14:57:25,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:57:25,613 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:57:25,644 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-5.wvr.c[2644,2657] [2023-09-01 14:57:25,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:57:25,667 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:57:25,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25 WrapperNode [2023-09-01 14:57:25,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:57:25,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:57:25,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:57:25,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:57:25,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,716 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 167 [2023-09-01 14:57:25,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:57:25,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:57:25,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:57:25,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:57:25,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,737 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:57:25,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:57:25,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:57:25,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:57:25,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25" (1/1) ... [2023-09-01 14:57:25,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:57:25,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:25,769 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 14:57:25,809 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 14:57:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:57:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:57:25,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:57:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:57:25,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:57:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:57:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:57:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:57:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:57:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:57:25,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:57:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:57:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:57:25,852 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 14:57:25,943 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:57:25,944 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:57:26,199 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:57:26,205 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:57:26,205 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 14:57:26,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:57:26 BoogieIcfgContainer [2023-09-01 14:57:26,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:57:26,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:57:26,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:57:26,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:57:26,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:57:25" (1/3) ... [2023-09-01 14:57:26,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de28d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:57:26, skipping insertion in model container [2023-09-01 14:57:26,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:57:25" (2/3) ... [2023-09-01 14:57:26,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de28d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:57:26, skipping insertion in model container [2023-09-01 14:57:26,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:57:26" (3/3) ... [2023-09-01 14:57:26,211 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2023-09-01 14:57:26,222 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:57:26,227 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:57:26,228 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:57:26,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:57:26,301 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:57:26,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 196 transitions, 408 flow [2023-09-01 14:57:26,385 INFO L130 PetriNetUnfolder]: 17/194 cut-off events. [2023-09-01 14:57:26,386 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:57:26,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 194 events. 17/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 165 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-09-01 14:57:26,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 196 transitions, 408 flow [2023-09-01 14:57:26,395 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 186 transitions, 384 flow [2023-09-01 14:57:26,397 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:57:26,403 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 186 transitions, 384 flow [2023-09-01 14:57:26,404 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 186 transitions, 384 flow [2023-09-01 14:57:26,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 186 transitions, 384 flow [2023-09-01 14:57:26,429 INFO L130 PetriNetUnfolder]: 17/186 cut-off events. [2023-09-01 14:57:26,430 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:57:26,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 186 events. 17/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 147 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-09-01 14:57:26,432 INFO L119 LiptonReduction]: Number of co-enabled transitions 3892 [2023-09-01 14:57:30,382 INFO L134 LiptonReduction]: Checked pairs total: 3908 [2023-09-01 14:57:30,382 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-09-01 14:57:30,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:57:30,405 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;@7b5a507c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:57:30,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:57:30,413 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-09-01 14:57:30,414 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:57:30,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:30,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:30,415 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 14:57:30,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:30,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1925462898, now seen corresponding path program 1 times [2023-09-01 14:57:30,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:30,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270542038] [2023-09-01 14:57:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:30,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:30,673 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 14:57:30,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:30,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270542038] [2023-09-01 14:57:30,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270542038] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:30,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:30,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:57:30,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773064532] [2023-09-01 14:57:30,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:30,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:57:30,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:30,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:57:30,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:57:30,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 426 [2023-09-01 14:57:30,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:30,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:30,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 426 [2023-09-01 14:57:30,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:30,769 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-09-01 14:57:30,769 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 14:57:30,769 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 186 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-09-01 14:57:30,770 INFO L137 encePairwiseOnDemand]: 423/426 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-09-01 14:57:30,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-09-01 14:57:30,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:57:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:57:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-09-01 14:57:30,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194053208137715 [2023-09-01 14:57:30,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-09-01 14:57:30,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-09-01 14:57:30,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:30,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-09-01 14:57:30,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 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 14:57:30,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 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 14:57:30,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 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 14:57:30,797 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 536 transitions. [2023-09-01 14:57:30,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-09-01 14:57:30,799 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 14:57:30,800 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-09-01 14:57:30,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, 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 14:57:30,803 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-09-01 14:57:30,803 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-09-01 14:57:30,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:30,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:30,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:30,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:57:30,804 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 14:57:30,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:30,805 INFO L85 PathProgramCache]: Analyzing trace with hash 406205141, now seen corresponding path program 1 times [2023-09-01 14:57:30,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:30,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505285045] [2023-09-01 14:57:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:30,973 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 14:57:30,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:30,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505285045] [2023-09-01 14:57:30,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505285045] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:30,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:30,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 14:57:30,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733447353] [2023-09-01 14:57:30,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:30,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:57:30,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:57:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:57:30,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 426 [2023-09-01 14:57:30,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 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 14:57:30,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:30,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 426 [2023-09-01 14:57:30,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:31,045 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-09-01 14:57:31,045 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:57:31,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 310 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-09-01 14:57:31,046 INFO L137 encePairwiseOnDemand]: 422/426 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-09-01 14:57:31,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-09-01 14:57:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:57:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:57:31,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-09-01 14:57:31,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41705790297339596 [2023-09-01 14:57:31,048 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-09-01 14:57:31,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-09-01 14:57:31,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:31,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-09-01 14:57:31,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 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 14:57:31,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 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 14:57:31,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 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 14:57:31,053 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 533 transitions. [2023-09-01 14:57:31,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-09-01 14:57:31,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 14:57:31,054 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-09-01 14:57:31,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, 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=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-09-01 14:57:31,055 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-09-01 14:57:31,055 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-09-01 14:57:31,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 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 14:57:31,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:31,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:31,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:57:31,056 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 14:57:31,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:31,057 INFO L85 PathProgramCache]: Analyzing trace with hash -91515540, now seen corresponding path program 1 times [2023-09-01 14:57:31,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:31,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763196795] [2023-09-01 14:57:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:31,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:31,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:31,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763196795] [2023-09-01 14:57:31,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763196795] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:31,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:31,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:57:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694063006] [2023-09-01 14:57:31,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:31,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:57:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:31,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:57:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:57:31,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 426 [2023-09-01 14:57:31,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 14:57:31,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:31,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 426 [2023-09-01 14:57:31,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:31,301 INFO L130 PetriNetUnfolder]: 85/170 cut-off events. [2023-09-01 14:57:31,301 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-09-01 14:57:31,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 170 events. 85/170 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 576 event pairs, 26 based on Foata normal form. 12/181 useless extension candidates. Maximal degree in co-relation 386. Up to 87 conditions per place. [2023-09-01 14:57:31,303 INFO L137 encePairwiseOnDemand]: 421/426 looper letters, 31 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2023-09-01 14:57:31,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 212 flow [2023-09-01 14:57:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:57:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:57:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 861 transitions. [2023-09-01 14:57:31,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042253521126761 [2023-09-01 14:57:31,305 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 861 transitions. [2023-09-01 14:57:31,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 861 transitions. [2023-09-01 14:57:31,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:31,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 861 transitions. [2023-09-01 14:57:31,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.2) internal successors, (861), 5 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 14:57:31,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 0 states have call successors, (0), 0 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 14:57:31,311 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 0 states have call successors, (0), 0 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 14:57:31,311 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 861 transitions. [2023-09-01 14:57:31,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 212 flow [2023-09-01 14:57:31,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:57:31,312 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2023-09-01 14:57:31,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-09-01 14:57:31,313 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-09-01 14:57:31,313 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2023-09-01 14:57:31,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 14:57:31,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:31,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:31,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:57:31,314 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 14:57:31,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:31,315 INFO L85 PathProgramCache]: Analyzing trace with hash 531655878, now seen corresponding path program 2 times [2023-09-01 14:57:31,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:31,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883023653] [2023-09-01 14:57:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:31,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:31,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:31,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883023653] [2023-09-01 14:57:31,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883023653] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:31,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:31,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:57:31,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706753289] [2023-09-01 14:57:31,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:31,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:57:31,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:31,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:57:31,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:57:31,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 426 [2023-09-01 14:57:31,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:31,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:31,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 426 [2023-09-01 14:57:31,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:31,484 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2023-09-01 14:57:31,485 INFO L131 PetriNetUnfolder]: For 123/135 co-relation queries the response was YES. [2023-09-01 14:57:31,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 163 events. 85/163 cut-off events. For 123/135 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 524 event pairs, 24 based on Foata normal form. 7/164 useless extension candidates. Maximal degree in co-relation 474. Up to 104 conditions per place. [2023-09-01 14:57:31,486 INFO L137 encePairwiseOnDemand]: 422/426 looper letters, 26 selfloop transitions, 4 changer transitions 4/35 dead transitions. [2023-09-01 14:57:31,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 206 flow [2023-09-01 14:57:31,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:57:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:57:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 712 transitions. [2023-09-01 14:57:31,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41784037558685444 [2023-09-01 14:57:31,488 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 712 transitions. [2023-09-01 14:57:31,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 712 transitions. [2023-09-01 14:57:31,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:31,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 712 transitions. [2023-09-01 14:57:31,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 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 14:57:31,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 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 14:57:31,493 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 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 14:57:31,493 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 712 transitions. [2023-09-01 14:57:31,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 206 flow [2023-09-01 14:57:31,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 193 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 14:57:31,494 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 112 flow [2023-09-01 14:57:31,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-09-01 14:57:31,495 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-09-01 14:57:31,495 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 112 flow [2023-09-01 14:57:31,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:31,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:31,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:31,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 14:57:31,496 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 14:57:31,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:31,496 INFO L85 PathProgramCache]: Analyzing trace with hash 51165837, now seen corresponding path program 1 times [2023-09-01 14:57:31,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:31,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250939485] [2023-09-01 14:57:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:31,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:31,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:31,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250939485] [2023-09-01 14:57:31,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250939485] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:31,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:31,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:57:31,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717387985] [2023-09-01 14:57:31,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:31,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:57:31,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:31,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:57:31,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:57:31,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 426 [2023-09-01 14:57:31,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 14:57:31,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:31,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 426 [2023-09-01 14:57:31,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:31,662 INFO L130 PetriNetUnfolder]: 82/167 cut-off events. [2023-09-01 14:57:31,662 INFO L131 PetriNetUnfolder]: For 226/246 co-relation queries the response was YES. [2023-09-01 14:57:31,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 167 events. 82/167 cut-off events. For 226/246 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 565 event pairs, 31 based on Foata normal form. 18/180 useless extension candidates. Maximal degree in co-relation 491. Up to 114 conditions per place. [2023-09-01 14:57:31,664 INFO L137 encePairwiseOnDemand]: 422/426 looper letters, 32 selfloop transitions, 4 changer transitions 2/40 dead transitions. [2023-09-01 14:57:31,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 254 flow [2023-09-01 14:57:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:57:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:57:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 694 transitions. [2023-09-01 14:57:31,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072769953051643 [2023-09-01 14:57:31,666 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 694 transitions. [2023-09-01 14:57:31,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 694 transitions. [2023-09-01 14:57:31,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:31,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 694 transitions. [2023-09-01 14:57:31,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.5) internal successors, (694), 4 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:31,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 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 14:57:31,671 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 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 14:57:31,671 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 112 flow. Second operand 4 states and 694 transitions. [2023-09-01 14:57:31,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 254 flow [2023-09-01 14:57:31,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:57:31,672 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 139 flow [2023-09-01 14:57:31,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-09-01 14:57:31,673 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-09-01 14:57:31,673 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 139 flow [2023-09-01 14:57:31,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 14:57:31,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:31,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:31,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 14:57:31,674 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 14:57:31,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:31,674 INFO L85 PathProgramCache]: Analyzing trace with hash 151453329, now seen corresponding path program 2 times [2023-09-01 14:57:31,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:31,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383095134] [2023-09-01 14:57:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:31,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:31,744 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 14:57:31,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:31,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383095134] [2023-09-01 14:57:31,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383095134] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:31,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727059652] [2023-09-01 14:57:31,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:57:31,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:31,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:31,747 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 14:57:31,748 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 14:57:31,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:57:31,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:57:31,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 14:57:31,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:31,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 14:57:31,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727059652] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:31,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 14:57:31,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-09-01 14:57:31,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133168629] [2023-09-01 14:57:31,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:31,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:57:31,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:31,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:57:31,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:57:32,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 426 [2023-09-01 14:57:32,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 14:57:32,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:32,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 426 [2023-09-01 14:57:32,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:32,057 INFO L130 PetriNetUnfolder]: 90/181 cut-off events. [2023-09-01 14:57:32,057 INFO L131 PetriNetUnfolder]: For 303/321 co-relation queries the response was YES. [2023-09-01 14:57:32,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 181 events. 90/181 cut-off events. For 303/321 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 602 event pairs, 27 based on Foata normal form. 20/196 useless extension candidates. Maximal degree in co-relation 643. Up to 126 conditions per place. [2023-09-01 14:57:32,058 INFO L137 encePairwiseOnDemand]: 422/426 looper letters, 30 selfloop transitions, 4 changer transitions 5/41 dead transitions. [2023-09-01 14:57:32,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 281 flow [2023-09-01 14:57:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:57:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:57:32,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 698 transitions. [2023-09-01 14:57:32,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096244131455399 [2023-09-01 14:57:32,060 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 698 transitions. [2023-09-01 14:57:32,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 698 transitions. [2023-09-01 14:57:32,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:32,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 698 transitions. [2023-09-01 14:57:32,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:32,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 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 14:57:32,064 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 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 14:57:32,064 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 139 flow. Second operand 4 states and 698 transitions. [2023-09-01 14:57:32,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 281 flow [2023-09-01 14:57:32,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 270 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 14:57:32,066 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 164 flow [2023-09-01 14:57:32,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-09-01 14:57:32,067 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-09-01 14:57:32,067 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 164 flow [2023-09-01 14:57:32,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 14:57:32,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:32,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:32,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:57:32,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-09-01 14:57:32,273 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 14:57:32,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:32,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1653193011, now seen corresponding path program 3 times [2023-09-01 14:57:32,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:32,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384141199] [2023-09-01 14:57:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:32,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:32,349 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 14:57:32,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384141199] [2023-09-01 14:57:32,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384141199] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416880128] [2023-09-01 14:57:32,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:57:32,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:32,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:32,351 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 14:57:32,368 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 14:57:32,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:57:32,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:57:32,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 14:57:32,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:32,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 14:57:32,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416880128] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:32,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 14:57:32,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-09-01 14:57:32,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832500935] [2023-09-01 14:57:32,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:32,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:57:32,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:57:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 14:57:32,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 426 [2023-09-01 14:57:32,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 14:57:32,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:32,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 426 [2023-09-01 14:57:32,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:32,646 INFO L130 PetriNetUnfolder]: 92/180 cut-off events. [2023-09-01 14:57:32,646 INFO L131 PetriNetUnfolder]: For 506/524 co-relation queries the response was YES. [2023-09-01 14:57:32,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 180 events. 92/180 cut-off events. For 506/524 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 604 event pairs, 35 based on Foata normal form. 20/194 useless extension candidates. Maximal degree in co-relation 672. Up to 126 conditions per place. [2023-09-01 14:57:32,647 INFO L137 encePairwiseOnDemand]: 422/426 looper letters, 29 selfloop transitions, 8 changer transitions 3/42 dead transitions. [2023-09-01 14:57:32,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 42 transitions, 314 flow [2023-09-01 14:57:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:57:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:57:32,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 695 transitions. [2023-09-01 14:57:32,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4078638497652582 [2023-09-01 14:57:32,650 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 695 transitions. [2023-09-01 14:57:32,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 695 transitions. [2023-09-01 14:57:32,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:32,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 695 transitions. [2023-09-01 14:57:32,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:32,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 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 14:57:32,654 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 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 14:57:32,654 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 164 flow. Second operand 4 states and 695 transitions. [2023-09-01 14:57:32,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 42 transitions, 314 flow [2023-09-01 14:57:32,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 301 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 14:57:32,656 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 200 flow [2023-09-01 14:57:32,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-09-01 14:57:32,657 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-09-01 14:57:32,657 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 200 flow [2023-09-01 14:57:32,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 14:57:32,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:32,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:32,671 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 14:57:32,862 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,SelfDestructingSolverStorable6 [2023-09-01 14:57:32,862 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 14:57:32,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:32,863 INFO L85 PathProgramCache]: Analyzing trace with hash 414711862, now seen corresponding path program 3 times [2023-09-01 14:57:32,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:32,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509275134] [2023-09-01 14:57:32,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:32,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:32,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:32,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509275134] [2023-09-01 14:57:32,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509275134] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:32,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:32,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:57:32,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186364060] [2023-09-01 14:57:32,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:32,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:57:32,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:32,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:57:32,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:57:32,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 426 [2023-09-01 14:57:32,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 14:57:32,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:32,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 426 [2023-09-01 14:57:32,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:33,073 INFO L130 PetriNetUnfolder]: 108/207 cut-off events. [2023-09-01 14:57:33,073 INFO L131 PetriNetUnfolder]: For 562/562 co-relation queries the response was YES. [2023-09-01 14:57:33,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 207 events. 108/207 cut-off events. For 562/562 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 670 event pairs, 38 based on Foata normal form. 4/210 useless extension candidates. Maximal degree in co-relation 824. Up to 147 conditions per place. [2023-09-01 14:57:33,075 INFO L137 encePairwiseOnDemand]: 421/426 looper letters, 33 selfloop transitions, 10 changer transitions 4/47 dead transitions. [2023-09-01 14:57:33,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 47 transitions, 388 flow [2023-09-01 14:57:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:57:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:57:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 855 transitions. [2023-09-01 14:57:33,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014084507042254 [2023-09-01 14:57:33,078 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 855 transitions. [2023-09-01 14:57:33,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 855 transitions. [2023-09-01 14:57:33,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:33,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 855 transitions. [2023-09-01 14:57:33,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 14:57:33,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 0 states have call successors, (0), 0 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 14:57:33,083 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 0 states have call successors, (0), 0 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 14:57:33,083 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 200 flow. Second operand 5 states and 855 transitions. [2023-09-01 14:57:33,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 47 transitions, 388 flow [2023-09-01 14:57:33,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 364 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 14:57:33,085 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 255 flow [2023-09-01 14:57:33,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-09-01 14:57:33,086 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-09-01 14:57:33,086 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 255 flow [2023-09-01 14:57:33,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 14:57:33,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:33,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:33,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 14:57:33,087 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 14:57:33,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:33,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1611530206, now seen corresponding path program 4 times [2023-09-01 14:57:33,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:33,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692082684] [2023-09-01 14:57:33,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:33,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:33,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:33,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692082684] [2023-09-01 14:57:33,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692082684] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:57:33,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:57:33,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:57:33,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186355964] [2023-09-01 14:57:33,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:57:33,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:57:33,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:33,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:57:33,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:57:33,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 426 [2023-09-01 14:57:33,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 14:57:33,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:33,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 426 [2023-09-01 14:57:33,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:33,277 INFO L130 PetriNetUnfolder]: 108/201 cut-off events. [2023-09-01 14:57:33,277 INFO L131 PetriNetUnfolder]: For 630/630 co-relation queries the response was YES. [2023-09-01 14:57:33,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 201 events. 108/201 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 643 event pairs, 31 based on Foata normal form. 4/204 useless extension candidates. Maximal degree in co-relation 858. Up to 138 conditions per place. [2023-09-01 14:57:33,278 INFO L137 encePairwiseOnDemand]: 421/426 looper letters, 31 selfloop transitions, 14 changer transitions 6/51 dead transitions. [2023-09-01 14:57:33,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 446 flow [2023-09-01 14:57:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:57:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:57:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 858 transitions. [2023-09-01 14:57:33,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028169014084507 [2023-09-01 14:57:33,281 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 858 transitions. [2023-09-01 14:57:33,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 858 transitions. [2023-09-01 14:57:33,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:33,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 858 transitions. [2023-09-01 14:57:33,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.6) internal successors, (858), 5 states have internal predecessors, (858), 0 states have call successors, (0), 0 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 14:57:33,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 0 states have call successors, (0), 0 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 14:57:33,285 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 0 states have call successors, (0), 0 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 14:57:33,285 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 255 flow. Second operand 5 states and 858 transitions. [2023-09-01 14:57:33,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 446 flow [2023-09-01 14:57:33,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 435 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 14:57:33,288 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 322 flow [2023-09-01 14:57:33,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-09-01 14:57:33,288 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-09-01 14:57:33,288 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 322 flow [2023-09-01 14:57:33,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 14:57:33,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:33,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:33,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 14:57:33,289 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 14:57:33,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:33,290 INFO L85 PathProgramCache]: Analyzing trace with hash -541961488, now seen corresponding path program 1 times [2023-09-01 14:57:33,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:33,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511625516] [2023-09-01 14:57:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:33,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:57:33,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:33,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511625516] [2023-09-01 14:57:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511625516] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:33,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030494182] [2023-09-01 14:57:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:33,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:33,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:33,569 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 14:57:33,571 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 14:57:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 14:57:33,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:33,699 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 14:57:33,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:57:33,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:57:33,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 14:57:33,945 INFO L321 Elim1Store]: treesize reduction 29, result has 64.2 percent of original size [2023-09-01 14:57:33,945 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 89 treesize of output 84 [2023-09-01 14:57:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:34,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:34,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:34,231 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 371 treesize of output 215 [2023-09-01 14:57:34,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:34,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 700 treesize of output 708 [2023-09-01 14:57:34,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:34,399 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 370 treesize of output 342 [2023-09-01 14:57:34,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:34,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 151 treesize of output 245 [2023-09-01 14:57:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:41,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030494182] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:41,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:41,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-09-01 14:57:41,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338995436] [2023-09-01 14:57:41,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:41,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 14:57:41,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:41,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 14:57:41,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=192, Unknown=4, NotChecked=0, Total=240 [2023-09-01 14:57:44,535 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 14:57:44,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 426 [2023-09-01 14:57:44,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 322 flow. Second operand has 16 states, 16 states have (on average 116.6875) internal successors, (1867), 16 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:44,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:44,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 426 [2023-09-01 14:57:44,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:46,319 INFO L130 PetriNetUnfolder]: 243/430 cut-off events. [2023-09-01 14:57:46,319 INFO L131 PetriNetUnfolder]: For 1418/1444 co-relation queries the response was YES. [2023-09-01 14:57:46,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 430 events. 243/430 cut-off events. For 1418/1444 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1657 event pairs, 16 based on Foata normal form. 36/460 useless extension candidates. Maximal degree in co-relation 1656. Up to 209 conditions per place. [2023-09-01 14:57:46,322 INFO L137 encePairwiseOnDemand]: 418/426 looper letters, 35 selfloop transitions, 20 changer transitions 64/122 dead transitions. [2023-09-01 14:57:46,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 122 transitions, 1087 flow [2023-09-01 14:57:46,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 14:57:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 14:57:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2380 transitions. [2023-09-01 14:57:46,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2793427230046948 [2023-09-01 14:57:46,327 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2380 transitions. [2023-09-01 14:57:46,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2380 transitions. [2023-09-01 14:57:46,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:46,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2380 transitions. [2023-09-01 14:57:46,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 119.0) internal successors, (2380), 20 states have internal predecessors, (2380), 0 states have call successors, (0), 0 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 14:57:46,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 426.0) internal successors, (8946), 21 states have internal predecessors, (8946), 0 states have call successors, (0), 0 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 14:57:46,340 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 426.0) internal successors, (8946), 21 states have internal predecessors, (8946), 0 states have call successors, (0), 0 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 14:57:46,340 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 322 flow. Second operand 20 states and 2380 transitions. [2023-09-01 14:57:46,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 122 transitions, 1087 flow [2023-09-01 14:57:46,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 122 transitions, 999 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-09-01 14:57:46,344 INFO L231 Difference]: Finished difference. Result has 70 places, 40 transitions, 383 flow [2023-09-01 14:57:46,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=383, PETRI_PLACES=70, PETRI_TRANSITIONS=40} [2023-09-01 14:57:46,345 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2023-09-01 14:57:46,345 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 40 transitions, 383 flow [2023-09-01 14:57:46,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 116.6875) internal successors, (1867), 16 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:46,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:46,346 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:46,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:57:46,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:46,551 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:46,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1708393027, now seen corresponding path program 2 times [2023-09-01 14:57:46,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:46,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232532530] [2023-09-01 14:57:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:46,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:57:47,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:47,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232532530] [2023-09-01 14:57:47,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232532530] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:47,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700832201] [2023-09-01 14:57:47,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:57:47,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:47,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:47,583 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:57:47,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:57:48,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:57:48,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:57:48,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 14:57:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:57:48,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:57:49,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700832201] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:49,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:49,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 15 [2023-09-01 14:57:49,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092635294] [2023-09-01 14:57:49,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:49,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 14:57:49,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:49,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 14:57:49,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-09-01 14:57:50,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 426 [2023-09-01 14:57:50,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 40 transitions, 383 flow. Second operand has 15 states, 15 states have (on average 165.33333333333334) internal successors, (2480), 15 states have internal predecessors, (2480), 0 states have call successors, (0), 0 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 14:57:50,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:50,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 426 [2023-09-01 14:57:50,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:56,613 INFO L130 PetriNetUnfolder]: 230/398 cut-off events. [2023-09-01 14:57:56,613 INFO L131 PetriNetUnfolder]: For 2010/2010 co-relation queries the response was YES. [2023-09-01 14:57:56,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2209 conditions, 398 events. 230/398 cut-off events. For 2010/2010 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1390 event pairs, 11 based on Foata normal form. 62/460 useless extension candidates. Maximal degree in co-relation 2182. Up to 213 conditions per place. [2023-09-01 14:57:56,616 INFO L137 encePairwiseOnDemand]: 420/426 looper letters, 89 selfloop transitions, 52 changer transitions 0/141 dead transitions. [2023-09-01 14:57:56,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 141 transitions, 1397 flow [2023-09-01 14:57:56,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 14:57:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 14:57:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4037 transitions. [2023-09-01 14:57:56,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39485524256651017 [2023-09-01 14:57:56,623 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4037 transitions. [2023-09-01 14:57:56,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4037 transitions. [2023-09-01 14:57:56,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:56,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4037 transitions. [2023-09-01 14:57:56,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 168.20833333333334) internal successors, (4037), 24 states have internal predecessors, (4037), 0 states have call successors, (0), 0 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 14:57:56,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 426.0) internal successors, (10650), 25 states have internal predecessors, (10650), 0 states have call successors, (0), 0 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 14:57:56,641 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 426.0) internal successors, (10650), 25 states have internal predecessors, (10650), 0 states have call successors, (0), 0 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 14:57:56,641 INFO L175 Difference]: Start difference. First operand has 70 places, 40 transitions, 383 flow. Second operand 24 states and 4037 transitions. [2023-09-01 14:57:56,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 141 transitions, 1397 flow [2023-09-01 14:57:56,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 141 transitions, 1266 flow, removed 47 selfloop flow, removed 11 redundant places. [2023-09-01 14:57:56,647 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 889 flow [2023-09-01 14:57:56,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=889, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2023-09-01 14:57:56,647 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2023-09-01 14:57:56,647 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 889 flow [2023-09-01 14:57:56,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 165.33333333333334) internal successors, (2480), 15 states have internal predecessors, (2480), 0 states have call successors, (0), 0 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 14:57:56,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:56,649 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:56,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:57:56,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:56,854 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:56,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1666646071, now seen corresponding path program 3 times [2023-09-01 14:57:56,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:56,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649691514] [2023-09-01 14:57:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:56,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:59,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649691514] [2023-09-01 14:57:59,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649691514] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494836243] [2023-09-01 14:57:59,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:57:59,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:59,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:59,523 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:57:59,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:58:00,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 14:58:00,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:58:00,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 66 conjunts are in the unsatisfiable core [2023-09-01 14:58:00,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:58:00,071 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 14:58:00,116 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 14:58:00,156 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 14:58:00,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:58:00,505 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2023-09-01 14:58:00,505 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 153 treesize of output 62 [2023-09-01 14:58:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:58:00,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:58:03,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:03,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 1536 treesize of output 681 [2023-09-01 14:58:04,764 INFO L321 Elim1Store]: treesize reduction 5, result has 98.8 percent of original size [2023-09-01 14:58:04,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 1678 treesize of output 1809 [2023-09-01 14:58:06,217 INFO L321 Elim1Store]: treesize reduction 8, result has 98.1 percent of original size [2023-09-01 14:58:06,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 1326 treesize of output 1278 [2023-09-01 14:58:08,099 INFO L321 Elim1Store]: treesize reduction 8, result has 98.1 percent of original size [2023-09-01 14:58:08,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 525 treesize of output 741 [2023-09-01 14:58:30,139 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 14:58:31,045 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-09-01 14:58:49,093 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-09-01 14:59:01,130 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2023-09-01 14:59:06,857 WARN L222 SmtUtils]: Spent 5.64s on a formula simplification that was a NOOP. DAG size: 625 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 14:59:35,523 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-09-01 14:59:39,986 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-09-01 14:59:51,720 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-09-01 15:00:03,800 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-09-01 15:00:08,723 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 15:00:10,827 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 15:00:16,205 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-09-01 15:01:09,908 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 15:01:11,578 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 15:01:13,443 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-09-01 15:01:30,963 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 15:01:38,997 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 15:01:40,637 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 15:01:54,877 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 15:02:10,065 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 15:02:50,417 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-09-01 15:03:02,878 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-09-01 15:03:07,949 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-09-01 15:03:20,487 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-09-01 15:03:32,855 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-09-01 15:03:37,609 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 15:03:39,641 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-09-01 15:04:08,435 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 15:04:10,635 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. Killed by 15