./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.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 d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 02:08:35,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:08:35,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:08:35,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:08:35,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:08:35,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:08:35,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:08:35,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:08:35,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:08:35,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:08:35,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:08:35,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:08:35,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:08:35,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:08:35,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:08:35,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:08:35,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:08:35,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:08:35,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:08:35,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:08:35,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:08:35,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:08:35,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:08:35,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:08:35,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:08:35,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:08:35,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:08:35,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:08:35,659 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:08:35,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:08:35,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:08:35,661 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:08:35,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:08:35,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:08:35,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:08:35,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:08:35,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:08:35,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:08:35,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:08:35,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:08:35,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:08:35,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:08:35,707 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:08:35,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:08:35,709 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:08:35,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:08:35,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:08:35,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:08:35,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:08:35,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:08:35,711 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:08:35,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:08:35,712 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:08:35,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:08:35,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:08:35,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:08:35,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:08:35,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:08:35,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:08:35,714 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:08:35,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:08:35,714 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:08:35,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:08:35,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:08:35,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:08:35,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:08:35,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:08:35,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:08:35,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:08:35,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:08:35,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:08:35,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:08:35,716 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:08:35,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:08:35,717 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:08:35,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:08:35,717 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:08:35,717 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:08:36,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:08:36,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:08:36,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:08:36,050 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:08:36,050 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:08:36,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c [2023-08-31 02:08:37,239 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:08:37,488 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:08:37,488 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c [2023-08-31 02:08:37,494 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25d2154a8/37ee7c833c5b4d699ac23a7442b9e46c/FLAG8a5a4f9fd [2023-08-31 02:08:37,505 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25d2154a8/37ee7c833c5b4d699ac23a7442b9e46c [2023-08-31 02:08:37,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:08:37,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:08:37,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:08:37,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:08:37,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:08:37,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5df86663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37, skipping insertion in model container [2023-08-31 02:08:37,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:08:37,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:08:37,731 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/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2023-08-31 02:08:37,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:08:37,759 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:08:37,796 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/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2023-08-31 02:08:37,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:08:37,822 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:08:37,823 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:08:37,829 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:08:37,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37 WrapperNode [2023-08-31 02:08:37,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:08:37,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:08:37,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:08:37,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:08:37,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,900 INFO L138 Inliner]: procedures = 27, calls = 73, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 257 [2023-08-31 02:08:37,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:08:37,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:08:37,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:08:37,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:08:37,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,950 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:08:37,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:08:37,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:08:37,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:08:37,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37" (1/1) ... [2023-08-31 02:08:37,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:08:37,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:08:37,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 02:08:38,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 02:08:38,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:08:38,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:08:38,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:08:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:08:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:08:38,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:08:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:08:38,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:08:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 02:08:38,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 02:08:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-31 02:08:38,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-31 02:08:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:08:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:08:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:08:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 02:08:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:08:38,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:08:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:08:38,043 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 02:08:38,145 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:08:38,150 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:08:38,554 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:08:38,718 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:08:38,718 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 02:08:38,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:08:38 BoogieIcfgContainer [2023-08-31 02:08:38,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:08:38,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:08:38,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:08:38,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:08:38,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:08:37" (1/3) ... [2023-08-31 02:08:38,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298b1e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:08:38, skipping insertion in model container [2023-08-31 02:08:38,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:08:37" (2/3) ... [2023-08-31 02:08:38,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298b1e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:08:38, skipping insertion in model container [2023-08-31 02:08:38,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:08:38" (3/3) ... [2023-08-31 02:08:38,728 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2023-08-31 02:08:38,736 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:08:38,744 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:08:38,745 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:08:38,745 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:08:38,850 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-31 02:08:38,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 205 transitions, 454 flow [2023-08-31 02:08:38,991 INFO L130 PetriNetUnfolder]: 14/190 cut-off events. [2023-08-31 02:08:38,991 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:08:39,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 190 events. 14/190 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 180 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 163. Up to 3 conditions per place. [2023-08-31 02:08:39,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 205 transitions, 454 flow [2023-08-31 02:08:39,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 182 transitions, 394 flow [2023-08-31 02:08:39,014 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:08:39,025 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 182 transitions, 394 flow [2023-08-31 02:08:39,029 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 182 transitions, 394 flow [2023-08-31 02:08:39,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 182 transitions, 394 flow [2023-08-31 02:08:39,063 INFO L130 PetriNetUnfolder]: 14/182 cut-off events. [2023-08-31 02:08:39,063 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:08:39,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 182 events. 14/182 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 180 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 163. Up to 3 conditions per place. [2023-08-31 02:08:39,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 2880 [2023-08-31 02:08:45,052 INFO L134 LiptonReduction]: Checked pairs total: 7881 [2023-08-31 02:08:45,052 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-08-31 02:08:45,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:08:45,070 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;@60cf68aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:08:45,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-31 02:08:45,078 INFO L130 PetriNetUnfolder]: 6/38 cut-off events. [2023-08-31 02:08:45,079 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:08:45,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:45,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:45,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:08:45,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:45,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1095116209, now seen corresponding path program 1 times [2023-08-31 02:08:45,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:45,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030289801] [2023-08-31 02:08:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:45,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:45,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:45,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030289801] [2023-08-31 02:08:45,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030289801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:08:45,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:08:45,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:08:45,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916709818] [2023-08-31 02:08:45,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:08:45,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:08:45,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:08:45,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:08:45,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 372 [2023-08-31 02:08:45,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 108 flow. Second operand has 4 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) [2023-08-31 02:08:45,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:45,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 372 [2023-08-31 02:08:45,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:46,117 INFO L130 PetriNetUnfolder]: 1658/2379 cut-off events. [2023-08-31 02:08:46,117 INFO L131 PetriNetUnfolder]: For 374/387 co-relation queries the response was YES. [2023-08-31 02:08:46,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5103 conditions, 2379 events. 1658/2379 cut-off events. For 374/387 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9807 event pairs, 523 based on Foata normal form. 5/1793 useless extension candidates. Maximal degree in co-relation 5002. Up to 1081 conditions per place. [2023-08-31 02:08:46,154 INFO L137 encePairwiseOnDemand]: 366/372 looper letters, 67 selfloop transitions, 7 changer transitions 1/84 dead transitions. [2023-08-31 02:08:46,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 84 transitions, 396 flow [2023-08-31 02:08:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:08:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:08:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 752 transitions. [2023-08-31 02:08:46,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053763440860215 [2023-08-31 02:08:46,174 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 752 transitions. [2023-08-31 02:08:46,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 752 transitions. [2023-08-31 02:08:46,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:46,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 752 transitions. [2023-08-31 02:08:46,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:46,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:46,190 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:46,192 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 108 flow. Second operand 4 states and 752 transitions. [2023-08-31 02:08:46,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 84 transitions, 396 flow [2023-08-31 02:08:46,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 84 transitions, 344 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-31 02:08:46,201 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 133 flow [2023-08-31 02:08:46,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-08-31 02:08:46,207 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-08-31 02:08:46,207 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 133 flow [2023-08-31 02:08:46,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2023-08-31 02:08:46,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:46,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:46,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:08:46,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:08:46,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:46,209 INFO L85 PathProgramCache]: Analyzing trace with hash 489950223, now seen corresponding path program 2 times [2023-08-31 02:08:46,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:46,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157043950] [2023-08-31 02:08:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:46,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:46,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:46,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157043950] [2023-08-31 02:08:46,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157043950] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:08:46,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:08:46,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:08:46,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902632140] [2023-08-31 02:08:46,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:08:46,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:08:46,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:46,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:08:46,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:08:46,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 372 [2023-08-31 02:08:46,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 133 flow. Second operand has 4 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) [2023-08-31 02:08:46,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:46,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 372 [2023-08-31 02:08:46,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:46,909 INFO L130 PetriNetUnfolder]: 2346/3398 cut-off events. [2023-08-31 02:08:46,909 INFO L131 PetriNetUnfolder]: For 760/760 co-relation queries the response was YES. [2023-08-31 02:08:46,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8017 conditions, 3398 events. 2346/3398 cut-off events. For 760/760 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15085 event pairs, 975 based on Foata normal form. 1/2822 useless extension candidates. Maximal degree in co-relation 3909. Up to 1875 conditions per place. [2023-08-31 02:08:46,926 INFO L137 encePairwiseOnDemand]: 366/372 looper letters, 71 selfloop transitions, 8 changer transitions 1/89 dead transitions. [2023-08-31 02:08:46,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 89 transitions, 416 flow [2023-08-31 02:08:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:08:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:08:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 751 transitions. [2023-08-31 02:08:46,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047043010752689 [2023-08-31 02:08:46,930 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 751 transitions. [2023-08-31 02:08:46,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 751 transitions. [2023-08-31 02:08:46,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:46,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 751 transitions. [2023-08-31 02:08:46,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.75) internal successors, (751), 4 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:46,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:46,936 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:46,936 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 133 flow. Second operand 4 states and 751 transitions. [2023-08-31 02:08:46,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 89 transitions, 416 flow [2023-08-31 02:08:46,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 89 transitions, 416 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 02:08:46,940 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 193 flow [2023-08-31 02:08:46,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2023-08-31 02:08:46,941 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-31 02:08:46,941 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 193 flow [2023-08-31 02:08:46,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2023-08-31 02:08:46,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:46,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:46,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 02:08:46,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:08:46,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:46,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1017003560, now seen corresponding path program 1 times [2023-08-31 02:08:46,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:46,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094243919] [2023-08-31 02:08:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:46,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:47,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:47,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094243919] [2023-08-31 02:08:47,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094243919] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:08:47,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:08:47,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:08:47,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734073218] [2023-08-31 02:08:47,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:08:47,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:08:47,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:08:47,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:08:47,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 372 [2023-08-31 02:08:47,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 169.6) internal successors, (848), 5 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:47,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:47,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 372 [2023-08-31 02:08:47,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:47,777 INFO L130 PetriNetUnfolder]: 3817/5665 cut-off events. [2023-08-31 02:08:47,777 INFO L131 PetriNetUnfolder]: For 4364/4364 co-relation queries the response was YES. [2023-08-31 02:08:47,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14384 conditions, 5665 events. 3817/5665 cut-off events. For 4364/4364 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 28776 event pairs, 2160 based on Foata normal form. 186/4864 useless extension candidates. Maximal degree in co-relation 8356. Up to 3221 conditions per place. [2023-08-31 02:08:47,811 INFO L137 encePairwiseOnDemand]: 367/372 looper letters, 90 selfloop transitions, 5 changer transitions 0/104 dead transitions. [2023-08-31 02:08:47,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 104 transitions, 574 flow [2023-08-31 02:08:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:08:47,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:08:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 903 transitions. [2023-08-31 02:08:47,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4854838709677419 [2023-08-31 02:08:47,814 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 903 transitions. [2023-08-31 02:08:47,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 903 transitions. [2023-08-31 02:08:47,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:47,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 903 transitions. [2023-08-31 02:08:47,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.6) internal successors, (903), 5 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:47,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:47,821 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:47,822 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 193 flow. Second operand 5 states and 903 transitions. [2023-08-31 02:08:47,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 104 transitions, 574 flow [2023-08-31 02:08:47,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 104 transitions, 572 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-31 02:08:47,833 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 243 flow [2023-08-31 02:08:47,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-08-31 02:08:47,834 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2023-08-31 02:08:47,834 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 243 flow [2023-08-31 02:08:47,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.6) internal successors, (848), 5 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:47,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:47,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:47,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 02:08:47,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:08:47,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:47,836 INFO L85 PathProgramCache]: Analyzing trace with hash 331371296, now seen corresponding path program 1 times [2023-08-31 02:08:47,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:47,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018142497] [2023-08-31 02:08:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:47,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:48,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:48,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018142497] [2023-08-31 02:08:48,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018142497] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:08:48,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139468499] [2023-08-31 02:08:48,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:48,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:48,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:08:48,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:08:48,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 02:08:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:48,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 02:08:48,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:08:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:48,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:08:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:48,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139468499] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:08:48,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:08:48,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-31 02:08:48,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121944938] [2023-08-31 02:08:48,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:08:48,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:08:48,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:48,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:08:48,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:08:48,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 372 [2023-08-31 02:08:48,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 165.83333333333334) internal successors, (1990), 12 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:48,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:48,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 372 [2023-08-31 02:08:48,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:49,508 INFO L130 PetriNetUnfolder]: 5288/7796 cut-off events. [2023-08-31 02:08:49,509 INFO L131 PetriNetUnfolder]: For 8771/8771 co-relation queries the response was YES. [2023-08-31 02:08:49,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20366 conditions, 7796 events. 5288/7796 cut-off events. For 8771/8771 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 42303 event pairs, 2005 based on Foata normal form. 186/6605 useless extension candidates. Maximal degree in co-relation 14672. Up to 2043 conditions per place. [2023-08-31 02:08:49,549 INFO L137 encePairwiseOnDemand]: 366/372 looper letters, 165 selfloop transitions, 10 changer transitions 0/184 dead transitions. [2023-08-31 02:08:49,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 184 transitions, 1068 flow [2023-08-31 02:08:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 02:08:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 02:08:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1611 transitions. [2023-08-31 02:08:49,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48118279569892475 [2023-08-31 02:08:49,554 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1611 transitions. [2023-08-31 02:08:49,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1611 transitions. [2023-08-31 02:08:49,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:49,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1611 transitions. [2023-08-31 02:08:49,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:49,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 372.0) internal successors, (3720), 10 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:49,564 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 372.0) internal successors, (3720), 10 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:49,565 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 243 flow. Second operand 9 states and 1611 transitions. [2023-08-31 02:08:49,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 184 transitions, 1068 flow [2023-08-31 02:08:49,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 184 transitions, 1064 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 02:08:49,577 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 316 flow [2023-08-31 02:08:49,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-31 02:08:49,578 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2023-08-31 02:08:49,578 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 316 flow [2023-08-31 02:08:49,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 165.83333333333334) internal successors, (1990), 12 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:49,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:49,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:49,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 02:08:49,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:49,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:08:49,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:49,787 INFO L85 PathProgramCache]: Analyzing trace with hash -683343843, now seen corresponding path program 1 times [2023-08-31 02:08:49,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:49,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723526034] [2023-08-31 02:08:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:49,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:50,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:50,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723526034] [2023-08-31 02:08:50,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723526034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:08:50,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:08:50,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:08:50,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587158005] [2023-08-31 02:08:50,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:08:50,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:08:50,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:50,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:08:50,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:08:50,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 372 [2023-08-31 02:08:50,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:50,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:50,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 372 [2023-08-31 02:08:50,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:51,055 INFO L130 PetriNetUnfolder]: 4174/6390 cut-off events. [2023-08-31 02:08:51,055 INFO L131 PetriNetUnfolder]: For 9862/9862 co-relation queries the response was YES. [2023-08-31 02:08:51,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17827 conditions, 6390 events. 4174/6390 cut-off events. For 9862/9862 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 34198 event pairs, 2918 based on Foata normal form. 0/5375 useless extension candidates. Maximal degree in co-relation 12574. Up to 5314 conditions per place. [2023-08-31 02:08:51,096 INFO L137 encePairwiseOnDemand]: 366/372 looper letters, 45 selfloop transitions, 2 changer transitions 28/84 dead transitions. [2023-08-31 02:08:51,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 84 transitions, 543 flow [2023-08-31 02:08:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:08:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:08:51,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 885 transitions. [2023-08-31 02:08:51,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47580645161290325 [2023-08-31 02:08:51,100 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 885 transitions. [2023-08-31 02:08:51,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 885 transitions. [2023-08-31 02:08:51,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:51,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 885 transitions. [2023-08-31 02:08:51,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:51,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:51,108 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:51,108 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 316 flow. Second operand 5 states and 885 transitions. [2023-08-31 02:08:51,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 84 transitions, 543 flow [2023-08-31 02:08:51,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 527 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-31 02:08:51,122 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 280 flow [2023-08-31 02:08:51,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2023-08-31 02:08:51,125 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2023-08-31 02:08:51,126 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 280 flow [2023-08-31 02:08:51,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:51,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:51,126 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:51,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 02:08:51,129 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:08:51,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:51,130 INFO L85 PathProgramCache]: Analyzing trace with hash -818681128, now seen corresponding path program 2 times [2023-08-31 02:08:51,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:51,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415251083] [2023-08-31 02:08:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:51,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:51,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:51,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415251083] [2023-08-31 02:08:51,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415251083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:08:51,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866587432] [2023-08-31 02:08:51,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:08:51,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:51,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:08:51,408 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:08:51,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:08:51,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:08:51,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:08:51,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 02:08:51,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:08:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:51,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:08:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:51,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866587432] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:08:51,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:08:51,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-08-31 02:08:51,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884005789] [2023-08-31 02:08:51,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:08:51,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 02:08:51,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:51,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 02:08:51,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:08:51,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 372 [2023-08-31 02:08:51,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 167.16666666666666) internal successors, (1003), 6 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:51,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:51,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 372 [2023-08-31 02:08:51,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:52,406 INFO L130 PetriNetUnfolder]: 3271/4874 cut-off events. [2023-08-31 02:08:52,406 INFO L131 PetriNetUnfolder]: For 7496/7496 co-relation queries the response was YES. [2023-08-31 02:08:52,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14504 conditions, 4874 events. 3271/4874 cut-off events. For 7496/7496 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 24028 event pairs, 1845 based on Foata normal form. 96/4792 useless extension candidates. Maximal degree in co-relation 14477. Up to 2273 conditions per place. [2023-08-31 02:08:52,440 INFO L137 encePairwiseOnDemand]: 365/372 looper letters, 84 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2023-08-31 02:08:52,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 660 flow [2023-08-31 02:08:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:08:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:08:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1050 transitions. [2023-08-31 02:08:52,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47043010752688175 [2023-08-31 02:08:52,444 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1050 transitions. [2023-08-31 02:08:52,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1050 transitions. [2023-08-31 02:08:52,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:52,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1050 transitions. [2023-08-31 02:08:52,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:52,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 372.0) internal successors, (2604), 7 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:52,451 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 372.0) internal successors, (2604), 7 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:52,451 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 280 flow. Second operand 6 states and 1050 transitions. [2023-08-31 02:08:52,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 660 flow [2023-08-31 02:08:52,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 632 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-31 02:08:52,463 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 321 flow [2023-08-31 02:08:52,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-08-31 02:08:52,465 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 21 predicate places. [2023-08-31 02:08:52,466 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 321 flow [2023-08-31 02:08:52,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 167.16666666666666) internal successors, (1003), 6 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:52,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:52,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:52,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 02:08:52,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-31 02:08:52,676 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:08:52,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:52,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1536916939, now seen corresponding path program 1 times [2023-08-31 02:08:52,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:52,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811580274] [2023-08-31 02:08:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:52,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:52,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:52,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811580274] [2023-08-31 02:08:52,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811580274] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:08:52,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941118376] [2023-08-31 02:08:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:52,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:52,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:08:52,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:08:52,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:08:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:53,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 02:08:53,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:08:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:53,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:08:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:53,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941118376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:08:53,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:08:53,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 02:08:53,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583943790] [2023-08-31 02:08:53,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:08:53,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:08:53,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:53,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:08:53,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-31 02:08:53,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 372 [2023-08-31 02:08:53,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 321 flow. Second operand has 11 states, 11 states have (on average 166.36363636363637) internal successors, (1830), 11 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:53,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:53,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 372 [2023-08-31 02:08:53,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:53,756 INFO L130 PetriNetUnfolder]: 2097/3250 cut-off events. [2023-08-31 02:08:53,757 INFO L131 PetriNetUnfolder]: For 5670/5670 co-relation queries the response was YES. [2023-08-31 02:08:53,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10260 conditions, 3250 events. 2097/3250 cut-off events. For 5670/5670 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15542 event pairs, 845 based on Foata normal form. 192/3311 useless extension candidates. Maximal degree in co-relation 8477. Up to 1337 conditions per place. [2023-08-31 02:08:53,776 INFO L137 encePairwiseOnDemand]: 364/372 looper letters, 63 selfloop transitions, 5 changer transitions 28/105 dead transitions. [2023-08-31 02:08:53,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 704 flow [2023-08-31 02:08:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:08:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:08:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1217 transitions. [2023-08-31 02:08:53,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467357910906298 [2023-08-31 02:08:53,779 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1217 transitions. [2023-08-31 02:08:53,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1217 transitions. [2023-08-31 02:08:53,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:53,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1217 transitions. [2023-08-31 02:08:53,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.85714285714286) internal successors, (1217), 7 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:53,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 372.0) internal successors, (2976), 8 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:53,786 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 372.0) internal successors, (2976), 8 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:53,786 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 321 flow. Second operand 7 states and 1217 transitions. [2023-08-31 02:08:53,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 704 flow [2023-08-31 02:08:53,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 105 transitions, 691 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-31 02:08:53,799 INFO L231 Difference]: Finished difference. Result has 72 places, 56 transitions, 290 flow [2023-08-31 02:08:53,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=290, PETRI_PLACES=72, PETRI_TRANSITIONS=56} [2023-08-31 02:08:53,799 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 26 predicate places. [2023-08-31 02:08:53,799 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 56 transitions, 290 flow [2023-08-31 02:08:53,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 166.36363636363637) internal successors, (1830), 11 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:53,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:53,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:53,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 02:08:54,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:54,007 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:08:54,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash -946785205, now seen corresponding path program 2 times [2023-08-31 02:08:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:54,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163586033] [2023-08-31 02:08:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:54,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:54,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:54,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163586033] [2023-08-31 02:08:54,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163586033] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:08:54,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977744373] [2023-08-31 02:08:54,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:08:54,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:54,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:08:54,190 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:08:54,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:08:54,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:08:54,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:08:54,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 02:08:54,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:08:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:54,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:08:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:54,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977744373] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:08:54,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:08:54,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2023-08-31 02:08:54,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748982900] [2023-08-31 02:08:54,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:08:54,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 02:08:54,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:54,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 02:08:54,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:08:54,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 372 [2023-08-31 02:08:54,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 56 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 167.33333333333334) internal successors, (1004), 6 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:54,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:54,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 372 [2023-08-31 02:08:54,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:54,746 INFO L130 PetriNetUnfolder]: 1374/2010 cut-off events. [2023-08-31 02:08:54,747 INFO L131 PetriNetUnfolder]: For 4003/4003 co-relation queries the response was YES. [2023-08-31 02:08:54,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7184 conditions, 2010 events. 1374/2010 cut-off events. For 4003/4003 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8101 event pairs, 639 based on Foata normal form. 134/2068 useless extension candidates. Maximal degree in co-relation 7143. Up to 1438 conditions per place. [2023-08-31 02:08:54,760 INFO L137 encePairwiseOnDemand]: 367/372 looper letters, 61 selfloop transitions, 8 changer transitions 0/78 dead transitions. [2023-08-31 02:08:54,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 78 transitions, 523 flow [2023-08-31 02:08:54,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:08:54,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:08:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1031 transitions. [2023-08-31 02:08:54,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46191756272401435 [2023-08-31 02:08:54,763 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1031 transitions. [2023-08-31 02:08:54,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1031 transitions. [2023-08-31 02:08:54,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:54,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1031 transitions. [2023-08-31 02:08:54,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.83333333333334) internal successors, (1031), 6 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:54,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 372.0) internal successors, (2604), 7 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:54,769 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 372.0) internal successors, (2604), 7 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:54,769 INFO L175 Difference]: Start difference. First operand has 72 places, 56 transitions, 290 flow. Second operand 6 states and 1031 transitions. [2023-08-31 02:08:54,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 78 transitions, 523 flow [2023-08-31 02:08:54,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 463 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-08-31 02:08:54,782 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 265 flow [2023-08-31 02:08:54,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-08-31 02:08:54,783 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 19 predicate places. [2023-08-31 02:08:54,783 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 265 flow [2023-08-31 02:08:54,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 167.33333333333334) internal successors, (1004), 6 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:54,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:54,784 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:54,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 02:08:54,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:54,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:08:54,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:54,996 INFO L85 PathProgramCache]: Analyzing trace with hash -247168574, now seen corresponding path program 1 times [2023-08-31 02:08:54,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:54,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390593904] [2023-08-31 02:08:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:54,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:08:55,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:55,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390593904] [2023-08-31 02:08:55,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390593904] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:08:55,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385884491] [2023-08-31 02:08:55,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:55,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:55,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:08:55,545 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:08:55,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 02:08:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:55,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 02:08:55,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:08:55,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-31 02:08:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:08:55,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:08:55,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:08:55,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2023-08-31 02:08:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:08:55,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385884491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:08:55,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:08:55,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-08-31 02:08:55,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741137897] [2023-08-31 02:08:55,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:08:55,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:08:55,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:55,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:08:55,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:08:56,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-08-31 02:08:56,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 265 flow. Second operand has 15 states, 15 states have (on average 157.53333333333333) internal successors, (2363), 15 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:56,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:56,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-08-31 02:08:56,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:57,457 INFO L130 PetriNetUnfolder]: 3727/5415 cut-off events. [2023-08-31 02:08:57,457 INFO L131 PetriNetUnfolder]: For 8668/8672 co-relation queries the response was YES. [2023-08-31 02:08:57,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18174 conditions, 5415 events. 3727/5415 cut-off events. For 8668/8672 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25649 event pairs, 661 based on Foata normal form. 2/5272 useless extension candidates. Maximal degree in co-relation 18138. Up to 2530 conditions per place. [2023-08-31 02:08:57,494 INFO L137 encePairwiseOnDemand]: 361/372 looper letters, 193 selfloop transitions, 60 changer transitions 2/261 dead transitions. [2023-08-31 02:08:57,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 261 transitions, 1648 flow [2023-08-31 02:08:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 02:08:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 02:08:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2687 transitions. [2023-08-31 02:08:57,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45144489247311825 [2023-08-31 02:08:57,501 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2687 transitions. [2023-08-31 02:08:57,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2687 transitions. [2023-08-31 02:08:57,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:57,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2687 transitions. [2023-08-31 02:08:57,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 167.9375) internal successors, (2687), 16 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:57,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 372.0) internal successors, (6324), 17 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:57,516 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 372.0) internal successors, (6324), 17 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:57,516 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 265 flow. Second operand 16 states and 2687 transitions. [2023-08-31 02:08:57,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 261 transitions, 1648 flow [2023-08-31 02:08:57,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 261 transitions, 1582 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-31 02:08:57,531 INFO L231 Difference]: Finished difference. Result has 84 places, 114 transitions, 787 flow [2023-08-31 02:08:57,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=787, PETRI_PLACES=84, PETRI_TRANSITIONS=114} [2023-08-31 02:08:57,532 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 38 predicate places. [2023-08-31 02:08:57,532 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 114 transitions, 787 flow [2023-08-31 02:08:57,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.53333333333333) internal successors, (2363), 15 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:57,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:57,533 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:57,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 02:08:57,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:57,740 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:08:57,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1968162608, now seen corresponding path program 2 times [2023-08-31 02:08:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:57,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546541932] [2023-08-31 02:08:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:57,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:08:58,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:58,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546541932] [2023-08-31 02:08:58,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546541932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:08:58,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587100833] [2023-08-31 02:08:58,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:08:58,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:58,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:08:58,382 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:08:58,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 02:08:58,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:08:58,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:08:58,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-31 02:08:58,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:08:58,564 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-31 02:08:58,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-31 02:08:58,693 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 02:08:58,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-31 02:08:58,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:08:59,062 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 02:08:59,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:08:59,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-31 02:08:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:59,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:08:59,241 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~X_0~0.offset 4))) (and (forall ((v_ArrVal_430 (Array Int Int))) (<= c_~s_2~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_430) c_~X_0~0.base) .cse0))) (forall ((v_ArrVal_430 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_430) c_~X_0~0.base) .cse0) (+ 1 c_~s_2~0))))) is different from false [2023-08-31 02:08:59,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:08:59,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 60 [2023-08-31 02:08:59,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-31 02:08:59,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-08-31 02:08:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:59,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587100833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:08:59,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:08:59,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2023-08-31 02:08:59,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143828056] [2023-08-31 02:08:59,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:08:59,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 02:08:59,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 02:08:59,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=720, Unknown=2, NotChecked=54, Total=870 [2023-08-31 02:09:00,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 372 [2023-08-31 02:09:00,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 114 transitions, 787 flow. Second operand has 30 states, 30 states have (on average 119.26666666666667) internal successors, (3578), 30 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:00,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:09:00,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 372 [2023-08-31 02:09:00,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:09:01,652 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~X_0~0.offset 4))) (let ((.cse0 (forall ((v_ArrVal_430 (Array Int Int))) (<= c_~s_2~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_430) c_~X_0~0.base) .cse2)))) (.cse1 (forall ((v_ArrVal_430 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_430) c_~X_0~0.base) .cse2) (+ 1 c_~s_2~0))))) (and (<= 1 c_~n_1~0) (<= (+ c_~X_0~0.base 1) |c_#StackHeapBarrier|) (or (< c_~i_3~0 c_~n_1~0) (and .cse0 .cse1)) (= (select |c_#valid| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) 1) (<= (+ |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_#valid| c_~X_0~0.base) 1) .cse0 (= 0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) .cse1 (= c_~X_0~0.offset 0)))) is different from false [2023-08-31 02:09:03,542 INFO L130 PetriNetUnfolder]: 6738/9682 cut-off events. [2023-08-31 02:09:03,542 INFO L131 PetriNetUnfolder]: For 29241/29273 co-relation queries the response was YES. [2023-08-31 02:09:03,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38207 conditions, 9682 events. 6738/9682 cut-off events. For 29241/29273 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 49620 event pairs, 897 based on Foata normal form. 33/9362 useless extension candidates. Maximal degree in co-relation 38164. Up to 3033 conditions per place. [2023-08-31 02:09:03,601 INFO L137 encePairwiseOnDemand]: 351/372 looper letters, 288 selfloop transitions, 141 changer transitions 2/436 dead transitions. [2023-08-31 02:09:03,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 436 transitions, 3453 flow [2023-08-31 02:09:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 02:09:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 02:09:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3467 transitions. [2023-08-31 02:09:03,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34518120270808444 [2023-08-31 02:09:03,614 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3467 transitions. [2023-08-31 02:09:03,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3467 transitions. [2023-08-31 02:09:03,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:09:03,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3467 transitions. [2023-08-31 02:09:03,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 128.40740740740742) internal successors, (3467), 27 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:03,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 372.0) internal successors, (10416), 28 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:03,647 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 372.0) internal successors, (10416), 28 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:03,647 INFO L175 Difference]: Start difference. First operand has 84 places, 114 transitions, 787 flow. Second operand 27 states and 3467 transitions. [2023-08-31 02:09:03,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 436 transitions, 3453 flow [2023-08-31 02:09:03,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 436 transitions, 3360 flow, removed 43 selfloop flow, removed 2 redundant places. [2023-08-31 02:09:03,774 INFO L231 Difference]: Finished difference. Result has 123 places, 223 transitions, 2166 flow [2023-08-31 02:09:03,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2166, PETRI_PLACES=123, PETRI_TRANSITIONS=223} [2023-08-31 02:09:03,776 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 77 predicate places. [2023-08-31 02:09:03,776 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 223 transitions, 2166 flow [2023-08-31 02:09:03,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 119.26666666666667) internal successors, (3578), 30 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:03,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:09:03,778 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:09:03,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 02:09:03,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:09:03,984 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:09:03,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:09:03,985 INFO L85 PathProgramCache]: Analyzing trace with hash -128424216, now seen corresponding path program 3 times [2023-08-31 02:09:03,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:09:03,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380384336] [2023-08-31 02:09:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:09:03,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:09:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:09:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:09:04,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:09:04,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380384336] [2023-08-31 02:09:04,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380384336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:09:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466609894] [2023-08-31 02:09:04,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:09:04,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:09:04,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:09:04,973 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:09:04,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 02:09:05,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:09:05,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:09:05,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-31 02:09:05,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:09:05,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:09:05,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:09:05,155 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 02:09:05,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-31 02:09:05,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 02:09:05,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:09:05,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:09:05,492 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-31 02:09:05,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-31 02:09:05,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:09:05,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:09:05,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:09:05,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-08-31 02:09:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:09:05,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:09:06,178 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~i_3~0 1))) (and (forall ((v_~i_3~0_145 Int) (v_ArrVal_497 (Array Int Int))) (or (< .cse0 v_~i_3~0_145) (< (+ (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_497) c_~X_0~0.base) (+ (* v_~i_3~0_145 4) c_~X_0~0.offset)) c_~s_2~0) (+ c_~s_6~0 1)) (< v_~i_3~0_145 c_~n_1~0))) (forall ((v_~i_3~0_145 Int) (v_ArrVal_497 (Array Int Int))) (or (< .cse0 v_~i_3~0_145) (< v_~i_3~0_145 c_~n_1~0) (<= c_~s_6~0 (+ (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_497) c_~X_0~0.base) (+ (* v_~i_3~0_145 4) c_~X_0~0.offset)) c_~s_2~0)))))) is different from false [2023-08-31 02:09:06,279 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~i_3~0 1))) (and (forall ((v_ArrVal_496 (Array Int Int)) (v_~i_3~0_145 Int) (v_ArrVal_497 (Array Int Int))) (or (< .cse0 v_~i_3~0_145) (< v_~i_3~0_145 c_~n_1~0) (<= c_~s_6~0 (+ (select (select (store (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t2~0.base| v_ArrVal_496) |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_497) c_~X_0~0.base) (+ (* v_~i_3~0_145 4) c_~X_0~0.offset)) c_~s_2~0)))) (forall ((v_ArrVal_496 (Array Int Int)) (v_~i_3~0_145 Int) (v_ArrVal_497 (Array Int Int))) (or (< .cse0 v_~i_3~0_145) (< (+ (select (select (store (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t2~0.base| v_ArrVal_496) |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_497) c_~X_0~0.base) (+ (* v_~i_3~0_145 4) c_~X_0~0.offset)) c_~s_2~0) (+ c_~s_6~0 1)) (< v_~i_3~0_145 c_~n_1~0))))) is different from false [2023-08-31 02:09:08,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:09:08,332 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 61 treesize of output 50 [2023-08-31 02:09:08,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:09:08,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52470 treesize of output 47358 [2023-08-31 02:09:08,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:09:08,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 144 [2023-08-31 02:09:08,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 282 [2023-08-31 02:09:08,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 258 [2023-08-31 02:09:08,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:09:08,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 107 [2023-08-31 02:09:09,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:09:09,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 52 [2023-08-31 02:09:09,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:09:09,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3526 treesize of output 3214 [2023-08-31 02:09:09,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 392 treesize of output 368 [2023-08-31 02:09:09,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 368 treesize of output 320 [2023-08-31 02:09:09,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:09:09,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 320 treesize of output 268 [2023-08-31 02:09:09,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:09:09,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 123 [2023-08-31 02:09:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:09:09,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466609894] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:09:09,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:09:09,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 35 [2023-08-31 02:09:09,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226018647] [2023-08-31 02:09:09,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:09:09,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-31 02:09:09,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:09:09,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-31 02:09:09,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1046, Unknown=19, NotChecked=134, Total=1332 [2023-08-31 02:09:09,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 372 [2023-08-31 02:09:09,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 223 transitions, 2166 flow. Second operand has 37 states, 37 states have (on average 116.0) internal successors, (4292), 37 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:09,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:09:09,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 372 [2023-08-31 02:09:09,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:09:30,789 WARN L222 SmtUtils]: Spent 9.17s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:09:36,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:09:43,085 INFO L130 PetriNetUnfolder]: 14797/20944 cut-off events. [2023-08-31 02:09:43,085 INFO L131 PetriNetUnfolder]: For 126113/126131 co-relation queries the response was YES. [2023-08-31 02:09:43,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110409 conditions, 20944 events. 14797/20944 cut-off events. For 126113/126131 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 120513 event pairs, 1495 based on Foata normal form. 22/20240 useless extension candidates. Maximal degree in co-relation 110347. Up to 10348 conditions per place. [2023-08-31 02:09:43,478 INFO L137 encePairwiseOnDemand]: 354/372 looper letters, 720 selfloop transitions, 274 changer transitions 26/1025 dead transitions. [2023-08-31 02:09:43,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 1025 transitions, 10636 flow [2023-08-31 02:09:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-31 02:09:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-31 02:09:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5492 transitions. [2023-08-31 02:09:43,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3355327468230694 [2023-08-31 02:09:43,493 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5492 transitions. [2023-08-31 02:09:43,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5492 transitions. [2023-08-31 02:09:43,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:09:43,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5492 transitions. [2023-08-31 02:09:43,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 124.81818181818181) internal successors, (5492), 44 states have internal predecessors, (5492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:43,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 372.0) internal successors, (16740), 45 states have internal predecessors, (16740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:43,533 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 372.0) internal successors, (16740), 45 states have internal predecessors, (16740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:43,533 INFO L175 Difference]: Start difference. First operand has 123 places, 223 transitions, 2166 flow. Second operand 44 states and 5492 transitions. [2023-08-31 02:09:43,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 1025 transitions, 10636 flow [2023-08-31 02:09:44,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 1025 transitions, 10048 flow, removed 272 selfloop flow, removed 4 redundant places. [2023-08-31 02:09:44,399 INFO L231 Difference]: Finished difference. Result has 187 places, 465 transitions, 5104 flow [2023-08-31 02:09:44,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5104, PETRI_PLACES=187, PETRI_TRANSITIONS=465} [2023-08-31 02:09:44,400 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 141 predicate places. [2023-08-31 02:09:44,400 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 465 transitions, 5104 flow [2023-08-31 02:09:44,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 116.0) internal successors, (4292), 37 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:44,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:09:44,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:09:44,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 02:09:44,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:09:44,607 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:09:44,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:09:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1765278764, now seen corresponding path program 4 times [2023-08-31 02:09:44,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:09:44,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731656150] [2023-08-31 02:09:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:09:44,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:09:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:09:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:09:45,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:09:45,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731656150] [2023-08-31 02:09:45,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731656150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:09:45,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647876449] [2023-08-31 02:09:45,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:09:45,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:09:45,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:09:45,339 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:09:45,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 02:09:45,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:09:45,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:09:45,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 02:09:45,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:09:45,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-31 02:09:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:09:45,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:09:45,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:09:45,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-08-31 02:09:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:09:45,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647876449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:09:45,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:09:45,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 16 [2023-08-31 02:09:45,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279068047] [2023-08-31 02:09:45,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:09:45,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 02:09:45,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:09:45,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 02:09:45,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-31 02:09:46,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-08-31 02:09:46,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 465 transitions, 5104 flow. Second operand has 17 states, 17 states have (on average 157.7058823529412) internal successors, (2681), 17 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:46,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:09:46,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-08-31 02:09:46,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:09:50,222 INFO L130 PetriNetUnfolder]: 14725/21526 cut-off events. [2023-08-31 02:09:50,222 INFO L131 PetriNetUnfolder]: For 264590/264678 co-relation queries the response was YES. [2023-08-31 02:09:50,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143621 conditions, 21526 events. 14725/21526 cut-off events. For 264590/264678 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 130313 event pairs, 4973 based on Foata normal form. 36/20783 useless extension candidates. Maximal degree in co-relation 143531. Up to 17542 conditions per place. [2023-08-31 02:09:50,455 INFO L137 encePairwiseOnDemand]: 361/372 looper letters, 495 selfloop transitions, 126 changer transitions 2/629 dead transitions. [2023-08-31 02:09:50,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 629 transitions, 8046 flow [2023-08-31 02:09:50,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 02:09:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 02:09:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2317 transitions. [2023-08-31 02:09:50,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44489247311827956 [2023-08-31 02:09:50,459 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2317 transitions. [2023-08-31 02:09:50,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2317 transitions. [2023-08-31 02:09:50,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:09:50,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2317 transitions. [2023-08-31 02:09:50,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 165.5) internal successors, (2317), 14 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:50,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 372.0) internal successors, (5580), 15 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:50,469 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 372.0) internal successors, (5580), 15 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:50,469 INFO L175 Difference]: Start difference. First operand has 187 places, 465 transitions, 5104 flow. Second operand 14 states and 2317 transitions. [2023-08-31 02:09:50,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 629 transitions, 8046 flow [2023-08-31 02:09:52,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 629 transitions, 7311 flow, removed 358 selfloop flow, removed 5 redundant places. [2023-08-31 02:09:52,082 INFO L231 Difference]: Finished difference. Result has 197 places, 498 transitions, 5336 flow [2023-08-31 02:09:52,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=4563, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5336, PETRI_PLACES=197, PETRI_TRANSITIONS=498} [2023-08-31 02:09:52,083 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 151 predicate places. [2023-08-31 02:09:52,083 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 498 transitions, 5336 flow [2023-08-31 02:09:52,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 157.7058823529412) internal successors, (2681), 17 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:52,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:09:52,084 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:09:52,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-31 02:09:52,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-31 02:09:52,290 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:09:52,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:09:52,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1951812150, now seen corresponding path program 1 times [2023-08-31 02:09:52,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:09:52,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808222587] [2023-08-31 02:09:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:09:52,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:09:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:09:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:09:52,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:09:52,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808222587] [2023-08-31 02:09:52,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808222587] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:09:52,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475577782] [2023-08-31 02:09:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:09:52,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:09:52,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:09:52,764 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:09:52,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 02:09:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:09:52,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 02:09:52,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:09:53,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-31 02:09:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:09:53,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:09:53,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:09:53,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2023-08-31 02:09:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:09:53,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475577782] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:09:53,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:09:53,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-08-31 02:09:53,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212089261] [2023-08-31 02:09:53,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:09:53,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:09:53,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:09:53,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:09:53,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:09:53,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-08-31 02:09:53,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 498 transitions, 5336 flow. Second operand has 15 states, 15 states have (on average 157.8) internal successors, (2367), 15 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:53,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:09:53,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-08-31 02:09:53,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:09:58,429 INFO L130 PetriNetUnfolder]: 17032/24797 cut-off events. [2023-08-31 02:09:58,430 INFO L131 PetriNetUnfolder]: For 265093/265171 co-relation queries the response was YES. [2023-08-31 02:09:58,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157896 conditions, 24797 events. 17032/24797 cut-off events. For 265093/265171 co-relation queries the response was YES. Maximal size of possible extension queue 1056. Compared 152477 event pairs, 5295 based on Foata normal form. 50/23931 useless extension candidates. Maximal degree in co-relation 157805. Up to 19853 conditions per place. [2023-08-31 02:09:58,904 INFO L137 encePairwiseOnDemand]: 362/372 looper letters, 596 selfloop transitions, 96 changer transitions 3/701 dead transitions. [2023-08-31 02:09:58,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 701 transitions, 8780 flow [2023-08-31 02:09:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 02:09:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 02:09:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2657 transitions. [2023-08-31 02:09:58,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4464045698924731 [2023-08-31 02:09:58,916 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2657 transitions. [2023-08-31 02:09:58,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2657 transitions. [2023-08-31 02:09:58,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:09:58,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2657 transitions. [2023-08-31 02:09:58,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 166.0625) internal successors, (2657), 16 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:58,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 372.0) internal successors, (6324), 17 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:58,941 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 372.0) internal successors, (6324), 17 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:58,942 INFO L175 Difference]: Start difference. First operand has 197 places, 498 transitions, 5336 flow. Second operand 16 states and 2657 transitions. [2023-08-31 02:09:58,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 701 transitions, 8780 flow [2023-08-31 02:10:00,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 701 transitions, 8543 flow, removed 41 selfloop flow, removed 7 redundant places. [2023-08-31 02:10:00,449 INFO L231 Difference]: Finished difference. Result has 213 places, 548 transitions, 6171 flow [2023-08-31 02:10:00,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=5117, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6171, PETRI_PLACES=213, PETRI_TRANSITIONS=548} [2023-08-31 02:10:00,450 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 167 predicate places. [2023-08-31 02:10:00,450 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 548 transitions, 6171 flow [2023-08-31 02:10:00,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.8) internal successors, (2367), 15 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:00,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:10:00,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:10:00,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 02:10:00,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 02:10:00,652 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:10:00,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:10:00,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1143179140, now seen corresponding path program 5 times [2023-08-31 02:10:00,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:10:00,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842638496] [2023-08-31 02:10:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:10:00,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:10:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:10:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:10:01,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:10:01,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842638496] [2023-08-31 02:10:01,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842638496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:10:01,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975538671] [2023-08-31 02:10:01,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:10:01,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:10:01,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:10:01,688 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:10:01,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 02:10:01,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:10:01,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:10:01,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-31 02:10:01,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:10:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:10:02,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 02:10:02,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:10:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:10:02,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:10:02,309 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~X_0~0.offset 4))) (and (forall ((v_ArrVal_666 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_666) c_~X_0~0.base) .cse0) (+ c_~t_4~0 1 c_~s_2~0))) (forall ((v_ArrVal_666 (Array Int Int))) (<= (+ c_~t_4~0 c_~s_2~0) (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_666) c_~X_0~0.base) .cse0))))) is different from false [2023-08-31 02:10:02,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:10:02,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 34 [2023-08-31 02:10:02,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-08-31 02:10:02,348 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 02:10:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:10:02,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975538671] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:10:02,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:10:02,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 25 [2023-08-31 02:10:02,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582846035] [2023-08-31 02:10:02,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:10:02,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 02:10:02,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:10:02,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 02:10:02,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=564, Unknown=1, NotChecked=48, Total=702 [2023-08-31 02:10:02,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 372 [2023-08-31 02:10:02,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 548 transitions, 6171 flow. Second operand has 27 states, 27 states have (on average 127.55555555555556) internal successors, (3444), 27 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:02,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:10:02,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 372 [2023-08-31 02:10:02,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:10:08,751 INFO L130 PetriNetUnfolder]: 20041/28549 cut-off events. [2023-08-31 02:10:08,751 INFO L131 PetriNetUnfolder]: For 338189/338215 co-relation queries the response was YES. [2023-08-31 02:10:08,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187704 conditions, 28549 events. 20041/28549 cut-off events. For 338189/338215 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 171798 event pairs, 6110 based on Foata normal form. 25/27576 useless extension candidates. Maximal degree in co-relation 187605. Up to 22082 conditions per place. [2023-08-31 02:10:09,069 INFO L137 encePairwiseOnDemand]: 361/372 looper letters, 545 selfloop transitions, 185 changer transitions 3/738 dead transitions. [2023-08-31 02:10:09,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 738 transitions, 9486 flow [2023-08-31 02:10:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 02:10:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 02:10:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2167 transitions. [2023-08-31 02:10:09,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640793010752688 [2023-08-31 02:10:09,075 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2167 transitions. [2023-08-31 02:10:09,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2167 transitions. [2023-08-31 02:10:09,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:10:09,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2167 transitions. [2023-08-31 02:10:09,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 135.4375) internal successors, (2167), 16 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:09,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 372.0) internal successors, (6324), 17 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:09,083 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 372.0) internal successors, (6324), 17 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:09,083 INFO L175 Difference]: Start difference. First operand has 213 places, 548 transitions, 6171 flow. Second operand 16 states and 2167 transitions. [2023-08-31 02:10:09,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 738 transitions, 9486 flow [2023-08-31 02:10:11,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 738 transitions, 9159 flow, removed 143 selfloop flow, removed 3 redundant places. [2023-08-31 02:10:11,651 INFO L231 Difference]: Finished difference. Result has 232 places, 589 transitions, 7083 flow [2023-08-31 02:10:11,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7083, PETRI_PLACES=232, PETRI_TRANSITIONS=589} [2023-08-31 02:10:11,652 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 186 predicate places. [2023-08-31 02:10:11,652 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 589 transitions, 7083 flow [2023-08-31 02:10:11,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 127.55555555555556) internal successors, (3444), 27 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:11,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:10:11,653 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:10:11,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-31 02:10:11,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 02:10:11,859 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:10:11,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:10:11,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1120686454, now seen corresponding path program 2 times [2023-08-31 02:10:11,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:10:11,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289514630] [2023-08-31 02:10:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:10:11,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:10:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:10:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:10:12,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:10:12,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289514630] [2023-08-31 02:10:12,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289514630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:10:12,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689538273] [2023-08-31 02:10:12,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:10:12,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:10:12,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:10:12,369 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:10:12,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 02:10:12,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:10:12,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:10:12,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 02:10:12,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:10:12,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:10:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:10:12,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:10:12,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:10:12,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2023-08-31 02:10:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:10:12,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689538273] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:10:12,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:10:12,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 16 [2023-08-31 02:10:12,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921134296] [2023-08-31 02:10:12,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:10:12,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 02:10:12,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:10:12,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 02:10:12,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-31 02:10:13,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 372 [2023-08-31 02:10:13,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 589 transitions, 7083 flow. Second operand has 17 states, 17 states have (on average 155.52941176470588) internal successors, (2644), 17 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:13,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:10:13,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 372 [2023-08-31 02:10:13,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:10:18,492 INFO L130 PetriNetUnfolder]: 18906/27495 cut-off events. [2023-08-31 02:10:18,492 INFO L131 PetriNetUnfolder]: For 350272/350307 co-relation queries the response was YES. [2023-08-31 02:10:18,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185001 conditions, 27495 events. 18906/27495 cut-off events. For 350272/350307 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 171811 event pairs, 6619 based on Foata normal form. 23/26499 useless extension candidates. Maximal degree in co-relation 184892. Up to 24279 conditions per place. [2023-08-31 02:10:19,103 INFO L137 encePairwiseOnDemand]: 361/372 looper letters, 611 selfloop transitions, 84 changer transitions 3/704 dead transitions. [2023-08-31 02:10:19,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 704 transitions, 9573 flow [2023-08-31 02:10:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 02:10:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 02:10:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2433 transitions. [2023-08-31 02:10:19,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4360215053763441 [2023-08-31 02:10:19,106 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2433 transitions. [2023-08-31 02:10:19,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2433 transitions. [2023-08-31 02:10:19,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:10:19,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2433 transitions. [2023-08-31 02:10:19,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 162.2) internal successors, (2433), 15 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:19,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 372.0) internal successors, (5952), 16 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:19,114 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 372.0) internal successors, (5952), 16 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:19,114 INFO L175 Difference]: Start difference. First operand has 232 places, 589 transitions, 7083 flow. Second operand 15 states and 2433 transitions. [2023-08-31 02:10:19,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 704 transitions, 9573 flow [2023-08-31 02:10:21,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 704 transitions, 9306 flow, removed 100 selfloop flow, removed 7 redundant places. [2023-08-31 02:10:21,503 INFO L231 Difference]: Finished difference. Result has 241 places, 601 transitions, 7205 flow [2023-08-31 02:10:21,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=6816, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7205, PETRI_PLACES=241, PETRI_TRANSITIONS=601} [2023-08-31 02:10:21,504 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 195 predicate places. [2023-08-31 02:10:21,505 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 601 transitions, 7205 flow [2023-08-31 02:10:21,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 155.52941176470588) internal successors, (2644), 17 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:21,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:10:21,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:10:21,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-31 02:10:21,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 02:10:21,706 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:10:21,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:10:21,707 INFO L85 PathProgramCache]: Analyzing trace with hash 595761762, now seen corresponding path program 6 times [2023-08-31 02:10:21,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:10:21,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256445721] [2023-08-31 02:10:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:10:21,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:10:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:10:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:10:22,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:10:22,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256445721] [2023-08-31 02:10:22,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256445721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:10:22,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977130007] [2023-08-31 02:10:22,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:10:22,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:10:22,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:10:22,340 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:10:22,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 02:10:22,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 02:10:22,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:10:22,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-31 02:10:22,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:10:22,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:10:22,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:10:22,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-31 02:10:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:10:22,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:10:22,987 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~X_0~0.offset 4 (* 4 c_~i_7~0)))) (and (forall ((v_ArrVal_779 (Array Int Int))) (< (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_779) c_~X_0~0.base) .cse0)) (+ 1 c_~s_2~0))) (forall ((v_ArrVal_779 (Array Int Int))) (<= c_~s_2~0 (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_779) c_~X_0~0.base) .cse0)))))) is different from false [2023-08-31 02:10:23,014 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~X_0~0.offset 4 (* 4 c_~i_7~0)))) (and (forall ((v_ArrVal_779 (Array Int Int))) (<= (+ c_~t_4~0 c_~s_2~0) (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_779) c_~X_0~0.base) .cse0)))) (forall ((v_ArrVal_779 (Array Int Int))) (< (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_779) c_~X_0~0.base) .cse0)) (+ c_~t_4~0 1 c_~s_2~0))))) is different from false [2023-08-31 02:10:23,025 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~X_0~0.offset 4))) (and (forall ((v_ArrVal_779 (Array Int Int))) (<= (+ c_~t_4~0 c_~s_2~0) (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_779) c_~X_0~0.base) .cse0))) (forall ((v_ArrVal_779 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_779) c_~X_0~0.base) .cse0) (+ c_~t_4~0 1 c_~s_2~0))))) is different from false [2023-08-31 02:10:23,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:10:23,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 34 [2023-08-31 02:10:23,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-08-31 02:10:23,066 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 02:10:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-31 02:10:23,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977130007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:10:23,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:10:23,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 25 [2023-08-31 02:10:23,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083118180] [2023-08-31 02:10:23,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:10:23,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 02:10:23,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:10:23,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 02:10:23,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=484, Unknown=3, NotChecked=138, Total=702 [2023-08-31 02:10:23,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 372 [2023-08-31 02:10:23,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 601 transitions, 7205 flow. Second operand has 27 states, 27 states have (on average 131.5185185185185) internal successors, (3551), 27 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:23,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:10:23,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 372 [2023-08-31 02:10:23,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:10:36,685 INFO L130 PetriNetUnfolder]: 41947/59791 cut-off events. [2023-08-31 02:10:36,685 INFO L131 PetriNetUnfolder]: For 770728/770772 co-relation queries the response was YES. [2023-08-31 02:10:37,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404218 conditions, 59791 events. 41947/59791 cut-off events. For 770728/770772 co-relation queries the response was YES. Maximal size of possible extension queue 2448. Compared 397239 event pairs, 13118 based on Foata normal form. 43/57752 useless extension candidates. Maximal degree in co-relation 403479. Up to 29815 conditions per place. [2023-08-31 02:10:37,741 INFO L137 encePairwiseOnDemand]: 360/372 looper letters, 1131 selfloop transitions, 366 changer transitions 4/1506 dead transitions. [2023-08-31 02:10:37,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 1506 transitions, 20415 flow [2023-08-31 02:10:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 02:10:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 02:10:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4205 transitions. [2023-08-31 02:10:37,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767921146953405 [2023-08-31 02:10:37,746 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4205 transitions. [2023-08-31 02:10:37,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4205 transitions. [2023-08-31 02:10:37,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:10:37,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4205 transitions. [2023-08-31 02:10:37,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 140.16666666666666) internal successors, (4205), 30 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:37,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 372.0) internal successors, (11532), 31 states have internal predecessors, (11532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:37,760 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 372.0) internal successors, (11532), 31 states have internal predecessors, (11532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:37,760 INFO L175 Difference]: Start difference. First operand has 241 places, 601 transitions, 7205 flow. Second operand 30 states and 4205 transitions. [2023-08-31 02:10:37,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 1506 transitions, 20415 flow [2023-08-31 02:10:46,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1506 transitions, 20068 flow, removed 80 selfloop flow, removed 9 redundant places. [2023-08-31 02:10:46,595 INFO L231 Difference]: Finished difference. Result has 274 places, 809 transitions, 11769 flow [2023-08-31 02:10:46,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=7030, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=11769, PETRI_PLACES=274, PETRI_TRANSITIONS=809} [2023-08-31 02:10:46,595 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 228 predicate places. [2023-08-31 02:10:46,596 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 809 transitions, 11769 flow [2023-08-31 02:10:46,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 131.5185185185185) internal successors, (3551), 27 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:46,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:10:46,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:10:46,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-31 02:10:46,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 02:10:46,797 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:10:46,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:10:46,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1352243446, now seen corresponding path program 3 times [2023-08-31 02:10:46,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:10:46,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798241002] [2023-08-31 02:10:46,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:10:46,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:10:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:10:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:10:47,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:10:47,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798241002] [2023-08-31 02:10:47,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798241002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:10:47,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744141124] [2023-08-31 02:10:47,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:10:47,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:10:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:10:47,237 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:10:47,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 02:10:47,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 02:10:47,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:10:47,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 02:10:47,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:10:47,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:10:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:10:47,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:10:47,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:10:47,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2023-08-31 02:10:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:10:47,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744141124] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:10:47,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:10:47,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2023-08-31 02:10:47,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376481136] [2023-08-31 02:10:47,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:10:47,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 02:10:47,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:10:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 02:10:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-31 02:10:48,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 372 [2023-08-31 02:10:48,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 809 transitions, 11769 flow. Second operand has 16 states, 16 states have (on average 155.75) internal successors, (2492), 16 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:10:48,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:10:48,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 372 [2023-08-31 02:10:48,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:11:01,266 INFO L130 PetriNetUnfolder]: 39435/57199 cut-off events. [2023-08-31 02:11:01,266 INFO L131 PetriNetUnfolder]: For 800449/800548 co-relation queries the response was YES. [2023-08-31 02:11:02,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396541 conditions, 57199 events. 39435/57199 cut-off events. For 800449/800548 co-relation queries the response was YES. Maximal size of possible extension queue 2489. Compared 393696 event pairs, 13804 based on Foata normal form. 44/55093 useless extension candidates. Maximal degree in co-relation 395765. Up to 50898 conditions per place. [2023-08-31 02:11:02,423 INFO L137 encePairwiseOnDemand]: 361/372 looper letters, 765 selfloop transitions, 136 changer transitions 3/910 dead transitions. [2023-08-31 02:11:02,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 910 transitions, 14576 flow [2023-08-31 02:11:02,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 02:11:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 02:11:02,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2423 transitions. [2023-08-31 02:11:02,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342293906810036 [2023-08-31 02:11:02,427 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2423 transitions. [2023-08-31 02:11:02,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2423 transitions. [2023-08-31 02:11:02,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:11:02,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2423 transitions. [2023-08-31 02:11:02,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 161.53333333333333) internal successors, (2423), 15 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:02,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 372.0) internal successors, (5952), 16 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:02,437 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 372.0) internal successors, (5952), 16 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:02,437 INFO L175 Difference]: Start difference. First operand has 274 places, 809 transitions, 11769 flow. Second operand 15 states and 2423 transitions. [2023-08-31 02:11:02,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 910 transitions, 14576 flow [2023-08-31 02:11:12,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 910 transitions, 14253 flow, removed 86 selfloop flow, removed 7 redundant places. [2023-08-31 02:11:12,020 INFO L231 Difference]: Finished difference. Result has 284 places, 819 transitions, 11940 flow [2023-08-31 02:11:12,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=11446, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11940, PETRI_PLACES=284, PETRI_TRANSITIONS=819} [2023-08-31 02:11:12,021 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 238 predicate places. [2023-08-31 02:11:12,021 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 819 transitions, 11940 flow [2023-08-31 02:11:12,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 155.75) internal successors, (2492), 16 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:12,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:11:12,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:11:12,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-31 02:11:12,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 02:11:12,228 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:11:12,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:11:12,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1712354002, now seen corresponding path program 7 times [2023-08-31 02:11:12,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:11:12,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727319368] [2023-08-31 02:11:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:11:12,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:11:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:11:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:11:12,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:11:12,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727319368] [2023-08-31 02:11:12,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727319368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:11:12,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81680713] [2023-08-31 02:11:12,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:11:12,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:11:12,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:11:12,681 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:11:12,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 02:11:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:11:12,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 02:11:12,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:11:12,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-31 02:11:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:11:13,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:11:13,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:11:13,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2023-08-31 02:11:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:11:13,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81680713] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:11:13,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:11:13,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-08-31 02:11:13,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553165297] [2023-08-31 02:11:13,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:11:13,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:11:13,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:11:13,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:11:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:11:13,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-08-31 02:11:13,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 819 transitions, 11940 flow. Second operand has 15 states, 15 states have (on average 157.6) internal successors, (2364), 15 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:13,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:11:13,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-08-31 02:11:13,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:11:27,327 INFO L130 PetriNetUnfolder]: 41499/60019 cut-off events. [2023-08-31 02:11:27,327 INFO L131 PetriNetUnfolder]: For 870387/870525 co-relation queries the response was YES. [2023-08-31 02:11:28,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422790 conditions, 60019 events. 41499/60019 cut-off events. For 870387/870525 co-relation queries the response was YES. Maximal size of possible extension queue 2641. Compared 413905 event pairs, 13608 based on Foata normal form. 63/57828 useless extension candidates. Maximal degree in co-relation 421999. Up to 51443 conditions per place. [2023-08-31 02:11:28,472 INFO L137 encePairwiseOnDemand]: 361/372 looper letters, 729 selfloop transitions, 239 changer transitions 2/976 dead transitions. [2023-08-31 02:11:28,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 976 transitions, 15808 flow [2023-08-31 02:11:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 02:11:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 02:11:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2465 transitions. [2023-08-31 02:11:28,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44175627240143367 [2023-08-31 02:11:28,475 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2465 transitions. [2023-08-31 02:11:28,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2465 transitions. [2023-08-31 02:11:28,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:11:28,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2465 transitions. [2023-08-31 02:11:28,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 164.33333333333334) internal successors, (2465), 15 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:28,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 372.0) internal successors, (5952), 16 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:28,483 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 372.0) internal successors, (5952), 16 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:28,483 INFO L175 Difference]: Start difference. First operand has 284 places, 819 transitions, 11940 flow. Second operand 15 states and 2465 transitions. [2023-08-31 02:11:28,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 976 transitions, 15808 flow [2023-08-31 02:11:40,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 976 transitions, 15494 flow, removed 37 selfloop flow, removed 11 redundant places. [2023-08-31 02:11:40,061 INFO L231 Difference]: Finished difference. Result has 291 places, 858 transitions, 13052 flow [2023-08-31 02:11:40,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=11626, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13052, PETRI_PLACES=291, PETRI_TRANSITIONS=858} [2023-08-31 02:11:40,062 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 245 predicate places. [2023-08-31 02:11:40,062 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 858 transitions, 13052 flow [2023-08-31 02:11:40,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.6) internal successors, (2364), 15 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:40,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:11:40,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:11:40,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 02:11:40,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:11:40,264 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:11:40,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:11:40,264 INFO L85 PathProgramCache]: Analyzing trace with hash 664998138, now seen corresponding path program 8 times [2023-08-31 02:11:40,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:11:40,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909818510] [2023-08-31 02:11:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:11:40,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:11:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:11:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:11:41,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:11:41,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909818510] [2023-08-31 02:11:41,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909818510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:11:41,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536072130] [2023-08-31 02:11:41,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:11:41,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:11:41,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:11:41,029 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:11:41,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 02:11:41,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:11:41,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:11:41,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-31 02:11:41,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:11:41,239 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-31 02:11:41,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-31 02:11:41,290 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 02:11:41,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-31 02:11:41,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 02:11:41,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:11:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:11:41,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:11:41,655 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~t_4~0 c_~s_2~0)) (.cse0 (+ c_~X_0~0.offset 4))) (and (forall ((v_ArrVal_953 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_953) c_~X_0~0.base) .cse0) .cse1)) (forall ((v_ArrVal_953 (Array Int Int))) (< .cse1 (+ (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_953) c_~X_0~0.base) .cse0) 1))))) is different from false [2023-08-31 02:11:41,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:11:41,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2023-08-31 02:11:41,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 02:11:41,687 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 02:11:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:11:41,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536072130] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:11:41,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:11:41,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 18 [2023-08-31 02:11:41,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617673739] [2023-08-31 02:11:41,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:11:41,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 02:11:41,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:11:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 02:11:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=285, Unknown=1, NotChecked=34, Total=380 [2023-08-31 02:11:41,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 372 [2023-08-31 02:11:41,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 858 transitions, 13052 flow. Second operand has 20 states, 20 states have (on average 128.0) internal successors, (2560), 20 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:11:41,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:11:41,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 372 [2023-08-31 02:11:41,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:12:01,913 INFO L130 PetriNetUnfolder]: 45939/65363 cut-off events. [2023-08-31 02:12:01,913 INFO L131 PetriNetUnfolder]: For 1067334/1067380 co-relation queries the response was YES. [2023-08-31 02:12:03,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472167 conditions, 65363 events. 45939/65363 cut-off events. For 1067334/1067380 co-relation queries the response was YES. Maximal size of possible extension queue 2752. Compared 439098 event pairs, 14780 based on Foata normal form. 43/63126 useless extension candidates. Maximal degree in co-relation 471360. Up to 53886 conditions per place. [2023-08-31 02:12:03,298 INFO L137 encePairwiseOnDemand]: 359/372 looper letters, 647 selfloop transitions, 345 changer transitions 3/1000 dead transitions. [2023-08-31 02:12:03,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1000 transitions, 16735 flow [2023-08-31 02:12:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 02:12:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 02:12:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2284 transitions. [2023-08-31 02:12:03,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611638203668564 [2023-08-31 02:12:03,301 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2284 transitions. [2023-08-31 02:12:03,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2284 transitions. [2023-08-31 02:12:03,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:12:03,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2284 transitions. [2023-08-31 02:12:03,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 134.35294117647058) internal successors, (2284), 17 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:03,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 372.0) internal successors, (6696), 18 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:03,309 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 372.0) internal successors, (6696), 18 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:03,310 INFO L175 Difference]: Start difference. First operand has 291 places, 858 transitions, 13052 flow. Second operand 17 states and 2284 transitions. [2023-08-31 02:12:03,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1000 transitions, 16735 flow [2023-08-31 02:12:18,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1000 transitions, 16001 flow, removed 132 selfloop flow, removed 10 redundant places. [2023-08-31 02:12:18,862 INFO L231 Difference]: Finished difference. Result has 301 places, 883 transitions, 13697 flow [2023-08-31 02:12:18,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=12331, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13697, PETRI_PLACES=301, PETRI_TRANSITIONS=883} [2023-08-31 02:12:18,863 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 255 predicate places. [2023-08-31 02:12:18,863 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 883 transitions, 13697 flow [2023-08-31 02:12:18,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 128.0) internal successors, (2560), 20 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:18,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:12:18,864 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:12:18,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 02:12:19,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:12:19,071 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:12:19,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:12:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1863509276, now seen corresponding path program 9 times [2023-08-31 02:12:19,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:12:19,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099897140] [2023-08-31 02:12:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:12:19,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:12:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:12:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:12:19,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:12:19,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099897140] [2023-08-31 02:12:19,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099897140] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:12:19,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735040015] [2023-08-31 02:12:19,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:12:19,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:12:19,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:12:19,561 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:12:19,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 02:12:19,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 02:12:19,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:12:19,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 02:12:19,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:12:19,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:12:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:12:19,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:12:20,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:12:20,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 17 [2023-08-31 02:12:20,055 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 02:12:20,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-08-31 02:12:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:12:20,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735040015] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:12:20,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:12:20,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2023-08-31 02:12:20,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433103012] [2023-08-31 02:12:20,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:12:20,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 02:12:20,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:12:20,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 02:12:20,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-31 02:12:20,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 372 [2023-08-31 02:12:20,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 883 transitions, 13697 flow. Second operand has 16 states, 16 states have (on average 155.375) internal successors, (2486), 16 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:20,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:12:20,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 372 [2023-08-31 02:12:20,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:12:38,656 INFO L130 PetriNetUnfolder]: 47275/68391 cut-off events. [2023-08-31 02:12:38,657 INFO L131 PetriNetUnfolder]: For 1241138/1241345 co-relation queries the response was YES. [2023-08-31 02:12:39,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504852 conditions, 68391 events. 47275/68391 cut-off events. For 1241138/1241345 co-relation queries the response was YES. Maximal size of possible extension queue 3007. Compared 478425 event pairs, 16458 based on Foata normal form. 58/65923 useless extension candidates. Maximal degree in co-relation 503971. Up to 58374 conditions per place. [2023-08-31 02:12:40,082 INFO L137 encePairwiseOnDemand]: 361/372 looper letters, 904 selfloop transitions, 168 changer transitions 3/1081 dead transitions. [2023-08-31 02:12:40,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1081 transitions, 18249 flow [2023-08-31 02:12:40,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 02:12:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 02:12:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2305 transitions. [2023-08-31 02:12:40,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425883256528418 [2023-08-31 02:12:40,085 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2305 transitions. [2023-08-31 02:12:40,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2305 transitions. [2023-08-31 02:12:40,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:12:40,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2305 transitions. [2023-08-31 02:12:40,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.64285714285714) internal successors, (2305), 14 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:40,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 372.0) internal successors, (5580), 15 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:40,093 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 372.0) internal successors, (5580), 15 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:40,093 INFO L175 Difference]: Start difference. First operand has 301 places, 883 transitions, 13697 flow. Second operand 14 states and 2305 transitions. [2023-08-31 02:12:40,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1081 transitions, 18249 flow [2023-08-31 02:12:58,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1081 transitions, 17803 flow, removed 113 selfloop flow, removed 9 redundant places. [2023-08-31 02:12:58,692 INFO L231 Difference]: Finished difference. Result has 311 places, 942 transitions, 15056 flow [2023-08-31 02:12:58,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=13260, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15056, PETRI_PLACES=311, PETRI_TRANSITIONS=942} [2023-08-31 02:12:58,693 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 265 predicate places. [2023-08-31 02:12:58,693 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 942 transitions, 15056 flow [2023-08-31 02:12:58,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 155.375) internal successors, (2486), 16 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:12:58,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:12:58,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:12:58,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 02:12:58,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:12:58,899 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:12:58,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:12:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2009226902, now seen corresponding path program 4 times [2023-08-31 02:12:58,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:12:58,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263621387] [2023-08-31 02:12:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:12:58,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:12:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:12:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:12:59,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:12:59,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263621387] [2023-08-31 02:12:59,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263621387] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:12:59,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528928039] [2023-08-31 02:12:59,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:12:59,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:12:59,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:12:59,357 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:12:59,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 02:12:59,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:12:59,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:12:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 02:12:59,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:12:59,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-31 02:12:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:12:59,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:12:59,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:12:59,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2023-08-31 02:12:59,855 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 02:12:59,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 13 [2023-08-31 02:12:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:12:59,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528928039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:12:59,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:12:59,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2023-08-31 02:12:59,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536566025] [2023-08-31 02:12:59,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:12:59,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 02:12:59,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:12:59,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 02:12:59,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-08-31 02:13:00,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-08-31 02:13:00,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 942 transitions, 15056 flow. Second operand has 16 states, 16 states have (on average 157.375) internal successors, (2518), 16 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:00,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:13:00,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-08-31 02:13:00,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:13:18,340 INFO L130 PetriNetUnfolder]: 49253/71169 cut-off events. [2023-08-31 02:13:18,340 INFO L131 PetriNetUnfolder]: For 1384908/1385119 co-relation queries the response was YES. [2023-08-31 02:13:19,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536806 conditions, 71169 events. 49253/71169 cut-off events. For 1384908/1385119 co-relation queries the response was YES. Maximal size of possible extension queue 3105. Compared 499084 event pairs, 18022 based on Foata normal form. 56/68571 useless extension candidates. Maximal degree in co-relation 535885. Up to 64045 conditions per place. [2023-08-31 02:13:20,276 INFO L137 encePairwiseOnDemand]: 363/372 looper letters, 933 selfloop transitions, 135 changer transitions 4/1078 dead transitions. [2023-08-31 02:13:20,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 1078 transitions, 18807 flow [2023-08-31 02:13:20,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 02:13:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 02:13:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2164 transitions. [2023-08-31 02:13:20,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44747725392886684 [2023-08-31 02:13:20,278 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2164 transitions. [2023-08-31 02:13:20,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2164 transitions. [2023-08-31 02:13:20,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:13:20,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2164 transitions. [2023-08-31 02:13:20,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 166.46153846153845) internal successors, (2164), 13 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:20,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 372.0) internal successors, (5208), 14 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:20,284 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 372.0) internal successors, (5208), 14 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:20,284 INFO L175 Difference]: Start difference. First operand has 311 places, 942 transitions, 15056 flow. Second operand 13 states and 2164 transitions. [2023-08-31 02:13:20,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 1078 transitions, 18807 flow [2023-08-31 02:13:41,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1078 transitions, 18215 flow, removed 282 selfloop flow, removed 5 redundant places. [2023-08-31 02:13:41,576 INFO L231 Difference]: Finished difference. Result has 321 places, 969 transitions, 15491 flow [2023-08-31 02:13:41,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=14480, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=942, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=822, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15491, PETRI_PLACES=321, PETRI_TRANSITIONS=969} [2023-08-31 02:13:41,577 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 275 predicate places. [2023-08-31 02:13:41,577 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 969 transitions, 15491 flow [2023-08-31 02:13:41,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 157.375) internal successors, (2518), 16 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:41,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:13:41,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:13:41,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 02:13:41,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:13:41,784 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 02:13:41,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:13:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash -469902256, now seen corresponding path program 10 times [2023-08-31 02:13:41,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:13:41,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571910341] [2023-08-31 02:13:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:13:41,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:13:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:13:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:13:42,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:13:42,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571910341] [2023-08-31 02:13:42,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571910341] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:13:42,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674191104] [2023-08-31 02:13:42,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:13:42,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:13:42,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:13:42,304 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:13:42,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 02:13:42,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:13:42,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:13:42,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 02:13:42,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:13:42,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:13:42,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:13:42,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-31 02:13:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:13:42,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:13:42,790 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~X_0~0.offset 4 (* 4 c_~i_7~0)))) (and (forall ((v_ArrVal_1122 (Array Int Int))) (< (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_1122) c_~X_0~0.base) .cse0)) (+ 1 c_~s_2~0))) (forall ((v_ArrVal_1122 (Array Int Int))) (<= c_~s_2~0 (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_1122) c_~X_0~0.base) .cse0)))))) is different from false [2023-08-31 02:13:42,813 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~X_0~0.offset 4 (* 4 c_~i_7~0)))) (and (forall ((v_ArrVal_1122 (Array Int Int))) (< (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_1122) c_~X_0~0.base) .cse0)) (+ c_~t_4~0 1 c_~s_2~0))) (forall ((v_ArrVal_1122 (Array Int Int))) (<= (+ c_~t_4~0 c_~s_2~0) (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_1122) c_~X_0~0.base) .cse0)))))) is different from false [2023-08-31 02:13:42,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:13:42,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 41 [2023-08-31 02:13:42,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2023-08-31 02:13:42,840 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 02:13:42,845 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 02:13:42,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-08-31 02:13:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-31 02:13:42,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674191104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:13:42,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:13:42,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-31 02:13:42,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262174364] [2023-08-31 02:13:42,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:13:42,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 02:13:42,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:13:42,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 02:13:42,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=358, Unknown=2, NotChecked=78, Total=506 [2023-08-31 02:13:42,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 372 [2023-08-31 02:13:42,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 969 transitions, 15491 flow. Second operand has 23 states, 23 states have (on average 139.7826086956522) internal successors, (3215), 23 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:42,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:13:42,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 372 [2023-08-31 02:13:42,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand