./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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-misc-5.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a --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 [2023-08-30 15:08:53,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:08:53,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:08:53,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:08:53,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:08:53,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:08:53,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:08:53,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:08:53,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:08:53,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:08:53,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:08:53,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:08:53,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:08:53,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:08:53,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:08:53,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:08:53,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:08:53,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:08:53,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:08:53,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:08:53,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:08:53,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:08:53,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:08:53,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:08:53,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:08:53,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:08:53,850 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:08:53,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:08:53,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:08:53,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:08:53,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:08:53,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:08:53,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:08:53,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:08:53,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:08:53,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:08:53,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:08:53,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:08:53,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:08:53,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:08:53,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:08:53,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:08:53,907 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:08:53,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:08:53,909 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:08:53,909 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:08:53,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:08:53,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:08:53,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:08:53,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:08:53,911 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:08:53,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:08:53,912 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:08:53,912 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:08:53,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:08:53,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:08:53,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:08:53,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:08:53,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:08:53,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:08:53,913 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:08:53,913 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:08:53,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:08:53,914 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:08:53,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:08:53,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:08:53,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:08:53,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:08:53,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:08:53,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:08:53,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:08:53,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:08:53,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:08:53,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:08:53,916 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:08:53,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:08:53,917 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:08:53,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:08:53,917 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:08:53,917 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:08:54,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:08:54,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:08:54,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:08:54,234 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:08:54,235 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:08:54,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-30 15:08:55,332 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:08:55,546 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:08:55,547 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-30 15:08:55,555 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78be62d08/a865c18087f441978dee07840eddda3b/FLAG998c28bfa [2023-08-30 15:08:55,566 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78be62d08/a865c18087f441978dee07840eddda3b [2023-08-30 15:08:55,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:08:55,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:08:55,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:08:55,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:08:55,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:08:55,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4c155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55, skipping insertion in model container [2023-08-30 15:08:55,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:08:55,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:08:55,736 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-misc-5.wvr.c[3027,3040] [2023-08-30 15:08:55,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:08:55,747 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:08:55,767 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-misc-5.wvr.c[3027,3040] [2023-08-30 15:08:55,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:08:55,775 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:08:55,775 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:08:55,781 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:08:55,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55 WrapperNode [2023-08-30 15:08:55,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:08:55,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:08:55,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:08:55,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:08:55,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,818 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 165 [2023-08-30 15:08:55,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:08:55,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:08:55,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:08:55,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:08:55,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,860 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:08:55,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:08:55,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:08:55,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:08:55,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55" (1/1) ... [2023-08-30 15:08:55,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:08:55,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:08:55,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 15:08:55,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 15:08:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:08:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:08:55,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:08:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:08:55,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:08:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 15:08:55,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 15:08:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:08:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:08:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:08:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:08:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:08:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:08:55,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:08:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:08:55,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:08:55,966 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 15:08:56,084 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:08:56,086 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:08:56,428 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:08:56,555 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:08:56,555 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 15:08:56,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:08:56 BoogieIcfgContainer [2023-08-30 15:08:56,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:08:56,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:08:56,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:08:56,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:08:56,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:08:55" (1/3) ... [2023-08-30 15:08:56,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696e2342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:08:56, skipping insertion in model container [2023-08-30 15:08:56,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:08:55" (2/3) ... [2023-08-30 15:08:56,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696e2342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:08:56, skipping insertion in model container [2023-08-30 15:08:56,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:08:56" (3/3) ... [2023-08-30 15:08:56,569 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-08-30 15:08:56,576 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:08:56,584 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:08:56,585 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 15:08:56,585 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:08:56,661 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 15:08:56,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 124 transitions, 272 flow [2023-08-30 15:08:56,746 INFO L130 PetriNetUnfolder]: 7/121 cut-off events. [2023-08-30 15:08:56,747 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 15:08:56,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 121 events. 7/121 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 173 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-30 15:08:56,753 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 124 transitions, 272 flow [2023-08-30 15:08:56,758 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 106 transitions, 224 flow [2023-08-30 15:08:56,761 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:08:56,769 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 106 transitions, 224 flow [2023-08-30 15:08:56,772 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 106 transitions, 224 flow [2023-08-30 15:08:56,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 106 transitions, 224 flow [2023-08-30 15:08:56,816 INFO L130 PetriNetUnfolder]: 7/106 cut-off events. [2023-08-30 15:08:56,817 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 15:08:56,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 106 events. 7/106 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 173 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-30 15:08:56,819 INFO L119 LiptonReduction]: Number of co-enabled transitions 2456 [2023-08-30 15:09:01,736 INFO L134 LiptonReduction]: Checked pairs total: 4008 [2023-08-30 15:09:01,736 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-30 15:09:01,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:09:01,757 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;@294c350d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:09:01,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2023-08-30 15:09:01,761 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 15:09:01,762 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:09:01,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:01,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 15:09:01,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:01,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:01,768 INFO L85 PathProgramCache]: Analyzing trace with hash 18741990, now seen corresponding path program 1 times [2023-08-30 15:09:01,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:01,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001749302] [2023-08-30 15:09:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:01,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:02,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:02,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001749302] [2023-08-30 15:09:02,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001749302] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:09:02,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:09:02,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:09:02,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431382826] [2023-08-30 15:09:02,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:09:02,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:09:02,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:02,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:09:02,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:09:02,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 15:09:02,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:02,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:02,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 15:09:02,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:02,580 INFO L130 PetriNetUnfolder]: 1625/2579 cut-off events. [2023-08-30 15:09:02,581 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2023-08-30 15:09:02,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5420 conditions, 2579 events. 1625/2579 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 17812 event pairs, 459 based on Foata normal form. 0/1205 useless extension candidates. Maximal degree in co-relation 4985. Up to 1761 conditions per place. [2023-08-30 15:09:02,600 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 47 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-30 15:09:02,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 225 flow [2023-08-30 15:09:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:09:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:09:02,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-30 15:09:02,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44712182061579653 [2023-08-30 15:09:02,613 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-30 15:09:02,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-30 15:09:02,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:02,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-30 15:09:02,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:02,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:02,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:02,626 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 80 flow. Second operand 3 states and 334 transitions. [2023-08-30 15:09:02,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 225 flow [2023-08-30 15:09:02,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 53 transitions, 215 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 15:09:02,636 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 90 flow [2023-08-30 15:09:02,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-30 15:09:02,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-30 15:09:02,645 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 90 flow [2023-08-30 15:09:02,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:02,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:02,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 15:09:02,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:09:02,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:02,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:02,651 INFO L85 PathProgramCache]: Analyzing trace with hash 18741992, now seen corresponding path program 1 times [2023-08-30 15:09:02,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:02,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699065473] [2023-08-30 15:09:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:02,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:02,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:02,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699065473] [2023-08-30 15:09:02,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699065473] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:09:02,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:09:02,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:09:02,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940083965] [2023-08-30 15:09:02,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:09:02,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:09:02,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:02,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:09:02,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:09:02,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 15:09:02,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:02,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:02,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 15:09:02,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:03,191 INFO L130 PetriNetUnfolder]: 2221/3195 cut-off events. [2023-08-30 15:09:03,192 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-08-30 15:09:03,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7099 conditions, 3195 events. 2221/3195 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 16601 event pairs, 511 based on Foata normal form. 0/1435 useless extension candidates. Maximal degree in co-relation 6384. Up to 3037 conditions per place. [2023-08-30 15:09:03,212 INFO L137 encePairwiseOnDemand]: 237/249 looper letters, 38 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2023-08-30 15:09:03,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 216 flow [2023-08-30 15:09:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:09:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:09:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2023-08-30 15:09:03,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4350736278447122 [2023-08-30 15:09:03,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2023-08-30 15:09:03,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2023-08-30 15:09:03,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:03,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2023-08-30 15:09:03,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,220 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,220 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 90 flow. Second operand 3 states and 325 transitions. [2023-08-30 15:09:03,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 216 flow [2023-08-30 15:09:03,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 48 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:09:03,222 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 140 flow [2023-08-30 15:09:03,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-30 15:09:03,223 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-30 15:09:03,223 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 140 flow [2023-08-30 15:09:03,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:03,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:09:03,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 15:09:03,224 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:03,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:03,225 INFO L85 PathProgramCache]: Analyzing trace with hash 831194038, now seen corresponding path program 1 times [2023-08-30 15:09:03,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:03,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197777798] [2023-08-30 15:09:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:03,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:03,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:03,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197777798] [2023-08-30 15:09:03,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197777798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:09:03,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:09:03,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:09:03,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922890353] [2023-08-30 15:09:03,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:09:03,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:09:03,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:03,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:09:03,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:09:03,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 15:09:03,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:03,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 15:09:03,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:03,539 INFO L130 PetriNetUnfolder]: 1435/2194 cut-off events. [2023-08-30 15:09:03,539 INFO L131 PetriNetUnfolder]: For 410/410 co-relation queries the response was YES. [2023-08-30 15:09:03,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5924 conditions, 2194 events. 1435/2194 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 13757 event pairs, 1211 based on Foata normal form. 0/1311 useless extension candidates. Maximal degree in co-relation 3665. Up to 2172 conditions per place. [2023-08-30 15:09:03,552 INFO L137 encePairwiseOnDemand]: 246/249 looper letters, 31 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-30 15:09:03,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 196 flow [2023-08-30 15:09:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:09:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:09:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-30 15:09:03,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069611780455154 [2023-08-30 15:09:03,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-30 15:09:03,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-30 15:09:03,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:03,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-30 15:09:03,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,560 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 140 flow. Second operand 3 states and 304 transitions. [2023-08-30 15:09:03,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 196 flow [2023-08-30 15:09:03,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:09:03,562 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 128 flow [2023-08-30 15:09:03,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-30 15:09:03,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-08-30 15:09:03,566 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 128 flow [2023-08-30 15:09:03,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:03,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:09:03,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 15:09:03,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:03,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:03,568 INFO L85 PathProgramCache]: Analyzing trace with hash 831194033, now seen corresponding path program 1 times [2023-08-30 15:09:03,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:03,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354124296] [2023-08-30 15:09:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:03,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:03,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:03,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354124296] [2023-08-30 15:09:03,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354124296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:09:03,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:09:03,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:09:03,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161947265] [2023-08-30 15:09:03,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:09:03,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:09:03,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:09:03,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:09:03,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 15:09:03,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:03,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 15:09:03,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:03,851 INFO L130 PetriNetUnfolder]: 1330/2032 cut-off events. [2023-08-30 15:09:03,851 INFO L131 PetriNetUnfolder]: For 404/404 co-relation queries the response was YES. [2023-08-30 15:09:03,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 2032 events. 1330/2032 cut-off events. For 404/404 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 12427 event pairs, 1107 based on Foata normal form. 0/1243 useless extension candidates. Maximal degree in co-relation 5397. Up to 2012 conditions per place. [2023-08-30 15:09:03,863 INFO L137 encePairwiseOnDemand]: 247/249 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-30 15:09:03,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 186 flow [2023-08-30 15:09:03,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:09:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:09:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-30 15:09:03,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042838018741633 [2023-08-30 15:09:03,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-30 15:09:03,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-30 15:09:03,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:03,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-30 15:09:03,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,869 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 128 flow. Second operand 3 states and 302 transitions. [2023-08-30 15:09:03,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 186 flow [2023-08-30 15:09:03,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:09:03,871 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 125 flow [2023-08-30 15:09:03,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-30 15:09:03,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-08-30 15:09:03,872 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 125 flow [2023-08-30 15:09:03,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:03,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:03,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:09:03,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 15:09:03,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:03,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:03,873 INFO L85 PathProgramCache]: Analyzing trace with hash 831194036, now seen corresponding path program 1 times [2023-08-30 15:09:03,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:03,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549929217] [2023-08-30 15:09:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:03,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:03,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549929217] [2023-08-30 15:09:03,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549929217] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:09:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455134405] [2023-08-30 15:09:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:03,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:03,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:09:04,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:09:04,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 15:09:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:04,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:09:04,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:09:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:04,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:09:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:04,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455134405] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:09:04,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:09:04,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 15:09:04,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352956786] [2023-08-30 15:09:04,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:09:04,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 15:09:04,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:04,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 15:09:04,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:09:04,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 15:09:04,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 125 flow. Second operand has 8 states, 8 states have (on average 91.5) internal successors, (732), 8 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:04,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:04,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 15:09:04,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:05,548 INFO L130 PetriNetUnfolder]: 4261/6319 cut-off events. [2023-08-30 15:09:05,549 INFO L131 PetriNetUnfolder]: For 900/900 co-relation queries the response was YES. [2023-08-30 15:09:05,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16535 conditions, 6319 events. 4261/6319 cut-off events. For 900/900 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 36225 event pairs, 145 based on Foata normal form. 20/3851 useless extension candidates. Maximal degree in co-relation 16524. Up to 2787 conditions per place. [2023-08-30 15:09:05,588 INFO L137 encePairwiseOnDemand]: 235/249 looper letters, 101 selfloop transitions, 54 changer transitions 0/159 dead transitions. [2023-08-30 15:09:05,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 159 transitions, 836 flow [2023-08-30 15:09:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 15:09:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 15:09:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 978 transitions. [2023-08-30 15:09:05,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364123159303882 [2023-08-30 15:09:05,592 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 978 transitions. [2023-08-30 15:09:05,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 978 transitions. [2023-08-30 15:09:05,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:05,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 978 transitions. [2023-08-30 15:09:05,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 108.66666666666667) internal successors, (978), 9 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:05,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 249.0) internal successors, (2490), 10 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:05,599 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 249.0) internal successors, (2490), 10 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:05,600 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 125 flow. Second operand 9 states and 978 transitions. [2023-08-30 15:09:05,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 159 transitions, 836 flow [2023-08-30 15:09:05,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 159 transitions, 835 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:09:05,603 INFO L231 Difference]: Finished difference. Result has 53 places, 86 transitions, 590 flow [2023-08-30 15:09:05,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=590, PETRI_PLACES=53, PETRI_TRANSITIONS=86} [2023-08-30 15:09:05,604 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2023-08-30 15:09:05,605 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 86 transitions, 590 flow [2023-08-30 15:09:05,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 91.5) internal successors, (732), 8 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:05,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:05,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:09:05,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 15:09:05,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:05,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:05,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash 836238345, now seen corresponding path program 1 times [2023-08-30 15:09:05,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:05,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318111755] [2023-08-30 15:09:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:05,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:05,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:05,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318111755] [2023-08-30 15:09:05,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318111755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:09:05,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:09:05,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:09:05,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851418441] [2023-08-30 15:09:05,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:09:05,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:09:05,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:05,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:09:05,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:09:05,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 15:09:05,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 86 transitions, 590 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:05,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:05,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 15:09:05,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:06,550 INFO L130 PetriNetUnfolder]: 3631/5301 cut-off events. [2023-08-30 15:09:06,551 INFO L131 PetriNetUnfolder]: For 11594/11594 co-relation queries the response was YES. [2023-08-30 15:09:06,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19500 conditions, 5301 events. 3631/5301 cut-off events. For 11594/11594 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 29190 event pairs, 673 based on Foata normal form. 84/4477 useless extension candidates. Maximal degree in co-relation 19482. Up to 4283 conditions per place. [2023-08-30 15:09:06,587 INFO L137 encePairwiseOnDemand]: 243/249 looper letters, 99 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2023-08-30 15:09:06,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 109 transitions, 931 flow [2023-08-30 15:09:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:09:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:09:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2023-08-30 15:09:06,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42168674698795183 [2023-08-30 15:09:06,590 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2023-08-30 15:09:06,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2023-08-30 15:09:06,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:06,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2023-08-30 15:09:06,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:06,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:06,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:06,595 INFO L175 Difference]: Start difference. First operand has 53 places, 86 transitions, 590 flow. Second operand 3 states and 315 transitions. [2023-08-30 15:09:06,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 109 transitions, 931 flow [2023-08-30 15:09:06,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 109 transitions, 886 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-08-30 15:09:06,630 INFO L231 Difference]: Finished difference. Result has 55 places, 83 transitions, 574 flow [2023-08-30 15:09:06,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=574, PETRI_PLACES=55, PETRI_TRANSITIONS=83} [2023-08-30 15:09:06,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-08-30 15:09:06,633 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 83 transitions, 574 flow [2023-08-30 15:09:06,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:06,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:06,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:09:06,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 15:09:06,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:06,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:06,634 INFO L85 PathProgramCache]: Analyzing trace with hash 466034312, now seen corresponding path program 1 times [2023-08-30 15:09:06,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:06,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353260998] [2023-08-30 15:09:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:06,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:06,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:06,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353260998] [2023-08-30 15:09:06,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353260998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:09:06,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:09:06,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:09:06,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56303997] [2023-08-30 15:09:06,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:09:06,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:09:06,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:09:06,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:09:06,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 249 [2023-08-30 15:09:06,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 83 transitions, 574 flow. Second operand has 5 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:06,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:06,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 249 [2023-08-30 15:09:06,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:07,513 INFO L130 PetriNetUnfolder]: 3233/4769 cut-off events. [2023-08-30 15:09:07,513 INFO L131 PetriNetUnfolder]: For 11642/11642 co-relation queries the response was YES. [2023-08-30 15:09:07,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17688 conditions, 4769 events. 3233/4769 cut-off events. For 11642/11642 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 26080 event pairs, 323 based on Foata normal form. 90/4315 useless extension candidates. Maximal degree in co-relation 17668. Up to 3726 conditions per place. [2023-08-30 15:09:07,557 INFO L137 encePairwiseOnDemand]: 245/249 looper letters, 97 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2023-08-30 15:09:07,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 108 transitions, 880 flow [2023-08-30 15:09:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:09:07,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:09:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 486 transitions. [2023-08-30 15:09:07,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39036144578313253 [2023-08-30 15:09:07,560 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 486 transitions. [2023-08-30 15:09:07,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 486 transitions. [2023-08-30 15:09:07,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:07,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 486 transitions. [2023-08-30 15:09:07,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.2) internal successors, (486), 5 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:07,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:07,564 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:07,564 INFO L175 Difference]: Start difference. First operand has 55 places, 83 transitions, 574 flow. Second operand 5 states and 486 transitions. [2023-08-30 15:09:07,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 108 transitions, 880 flow [2023-08-30 15:09:07,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 108 transitions, 862 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 15:09:07,589 INFO L231 Difference]: Finished difference. Result has 54 places, 74 transitions, 505 flow [2023-08-30 15:09:07,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=505, PETRI_PLACES=54, PETRI_TRANSITIONS=74} [2023-08-30 15:09:07,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-08-30 15:09:07,590 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 74 transitions, 505 flow [2023-08-30 15:09:07,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:07,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:07,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:09:07,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 15:09:07,591 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:07,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:07,592 INFO L85 PathProgramCache]: Analyzing trace with hash 465530248, now seen corresponding path program 1 times [2023-08-30 15:09:07,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:07,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832953790] [2023-08-30 15:09:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:07,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:07,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:07,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832953790] [2023-08-30 15:09:07,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832953790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:09:07,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:09:07,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:09:07,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683058375] [2023-08-30 15:09:07,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:09:07,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:09:07,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:07,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:09:07,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:09:07,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 15:09:07,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 74 transitions, 505 flow. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:07,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:07,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 15:09:07,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:08,240 INFO L130 PetriNetUnfolder]: 3309/5170 cut-off events. [2023-08-30 15:09:08,240 INFO L131 PetriNetUnfolder]: For 13142/13142 co-relation queries the response was YES. [2023-08-30 15:09:08,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18358 conditions, 5170 events. 3309/5170 cut-off events. For 13142/13142 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 32722 event pairs, 859 based on Foata normal form. 149/4786 useless extension candidates. Maximal degree in co-relation 18339. Up to 3449 conditions per place. [2023-08-30 15:09:08,271 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 105 selfloop transitions, 8 changer transitions 0/117 dead transitions. [2023-08-30 15:09:08,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 117 transitions, 1012 flow [2023-08-30 15:09:08,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:09:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:09:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-30 15:09:08,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428380187416332 [2023-08-30 15:09:08,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-30 15:09:08,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-30 15:09:08,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:08,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-30 15:09:08,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:08,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:08,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:08,275 INFO L175 Difference]: Start difference. First operand has 54 places, 74 transitions, 505 flow. Second operand 3 states and 320 transitions. [2023-08-30 15:09:08,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 117 transitions, 1012 flow [2023-08-30 15:09:08,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 117 transitions, 1002 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:09:08,288 INFO L231 Difference]: Finished difference. Result has 54 places, 77 transitions, 574 flow [2023-08-30 15:09:08,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=574, PETRI_PLACES=54, PETRI_TRANSITIONS=77} [2023-08-30 15:09:08,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-08-30 15:09:08,291 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 77 transitions, 574 flow [2023-08-30 15:09:08,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:08,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:08,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:09:08,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 15:09:08,292 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:08,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash -75606043, now seen corresponding path program 1 times [2023-08-30 15:09:08,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:08,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304625314] [2023-08-30 15:09:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:08,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:08,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:08,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304625314] [2023-08-30 15:09:08,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304625314] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:09:08,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:09:08,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:09:08,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828207493] [2023-08-30 15:09:08,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:09:08,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:09:08,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:08,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:09:08,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:09:08,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 15:09:08,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 77 transitions, 574 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:08,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:08,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 15:09:08,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:08,992 INFO L130 PetriNetUnfolder]: 3303/5301 cut-off events. [2023-08-30 15:09:08,992 INFO L131 PetriNetUnfolder]: For 13260/13260 co-relation queries the response was YES. [2023-08-30 15:09:09,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19395 conditions, 5301 events. 3303/5301 cut-off events. For 13260/13260 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 34035 event pairs, 169 based on Foata normal form. 130/5067 useless extension candidates. Maximal degree in co-relation 19376. Up to 3433 conditions per place. [2023-08-30 15:09:09,035 INFO L137 encePairwiseOnDemand]: 236/249 looper letters, 77 selfloop transitions, 41 changer transitions 0/122 dead transitions. [2023-08-30 15:09:09,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 122 transitions, 1082 flow [2023-08-30 15:09:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:09:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:09:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 426 transitions. [2023-08-30 15:09:09,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42771084337349397 [2023-08-30 15:09:09,037 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 426 transitions. [2023-08-30 15:09:09,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 426 transitions. [2023-08-30 15:09:09,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:09,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 426 transitions. [2023-08-30 15:09:09,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:09,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:09,041 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:09,041 INFO L175 Difference]: Start difference. First operand has 54 places, 77 transitions, 574 flow. Second operand 4 states and 426 transitions. [2023-08-30 15:09:09,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 122 transitions, 1082 flow [2023-08-30 15:09:09,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 122 transitions, 1072 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:09:09,058 INFO L231 Difference]: Finished difference. Result has 58 places, 102 transitions, 1015 flow [2023-08-30 15:09:09,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1015, PETRI_PLACES=58, PETRI_TRANSITIONS=102} [2023-08-30 15:09:09,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2023-08-30 15:09:09,059 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 102 transitions, 1015 flow [2023-08-30 15:09:09,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:09,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:09,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-30 15:09:09,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 15:09:09,060 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:09,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash -86438593, now seen corresponding path program 1 times [2023-08-30 15:09:09,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:09,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605635136] [2023-08-30 15:09:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:09:09,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:09,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605635136] [2023-08-30 15:09:09,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605635136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:09:09,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:09:09,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:09:09,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669976639] [2023-08-30 15:09:09,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:09:09,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:09:09,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:09,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:09:09,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:09:09,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 15:09:09,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 102 transitions, 1015 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:09,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:09,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 15:09:09,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:09,532 INFO L130 PetriNetUnfolder]: 2333/3634 cut-off events. [2023-08-30 15:09:09,533 INFO L131 PetriNetUnfolder]: For 22369/22369 co-relation queries the response was YES. [2023-08-30 15:09:09,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14741 conditions, 3634 events. 2333/3634 cut-off events. For 22369/22369 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 22278 event pairs, 1459 based on Foata normal form. 391/3608 useless extension candidates. Maximal degree in co-relation 14719. Up to 3510 conditions per place. [2023-08-30 15:09:09,561 INFO L137 encePairwiseOnDemand]: 246/249 looper letters, 73 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-08-30 15:09:09,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 853 flow [2023-08-30 15:09:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:09:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:09:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-30 15:09:09,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40160642570281124 [2023-08-30 15:09:09,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-30 15:09:09,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-30 15:09:09,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:09,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-30 15:09:09,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:09,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:09,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:09,567 INFO L175 Difference]: Start difference. First operand has 58 places, 102 transitions, 1015 flow. Second operand 3 states and 300 transitions. [2023-08-30 15:09:09,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 853 flow [2023-08-30 15:09:09,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 78 transitions, 835 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 15:09:09,583 INFO L231 Difference]: Finished difference. Result has 55 places, 78 transitions, 689 flow [2023-08-30 15:09:09,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=689, PETRI_PLACES=55, PETRI_TRANSITIONS=78} [2023-08-30 15:09:09,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-08-30 15:09:09,584 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 78 transitions, 689 flow [2023-08-30 15:09:09,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:09,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:09,585 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-30 15:09:09,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 15:09:09,585 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:09,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:09,586 INFO L85 PathProgramCache]: Analyzing trace with hash -86438590, now seen corresponding path program 1 times [2023-08-30 15:09:09,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:09,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485830952] [2023-08-30 15:09:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:09,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:09,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:09,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485830952] [2023-08-30 15:09:09,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485830952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:09:09,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602610872] [2023-08-30 15:09:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:09,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:09,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:09:09,719 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:09:09,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 15:09:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 15:09:09,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:09:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:09,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:09:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:10,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602610872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:09:10,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:09:10,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-08-30 15:09:10,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122316857] [2023-08-30 15:09:10,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:09:10,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 15:09:10,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 15:09:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-08-30 15:09:10,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 15:09:10,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 78 transitions, 689 flow. Second operand has 10 states, 10 states have (on average 91.4) internal successors, (914), 10 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:10,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:10,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 15:09:10,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:11,499 INFO L130 PetriNetUnfolder]: 3489/5589 cut-off events. [2023-08-30 15:09:11,499 INFO L131 PetriNetUnfolder]: For 21818/21818 co-relation queries the response was YES. [2023-08-30 15:09:11,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21660 conditions, 5589 events. 3489/5589 cut-off events. For 21818/21818 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34201 event pairs, 57 based on Foata normal form. 450/5483 useless extension candidates. Maximal degree in co-relation 21638. Up to 2025 conditions per place. [2023-08-30 15:09:11,546 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 124 selfloop transitions, 98 changer transitions 0/226 dead transitions. [2023-08-30 15:09:11,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 226 transitions, 2018 flow [2023-08-30 15:09:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 15:09:11,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 15:09:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1157 transitions. [2023-08-30 15:09:11,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224169404892296 [2023-08-30 15:09:11,550 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1157 transitions. [2023-08-30 15:09:11,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1157 transitions. [2023-08-30 15:09:11,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:11,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1157 transitions. [2023-08-30 15:09:11,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 105.18181818181819) internal successors, (1157), 11 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:11,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:11,558 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:11,558 INFO L175 Difference]: Start difference. First operand has 55 places, 78 transitions, 689 flow. Second operand 11 states and 1157 transitions. [2023-08-30 15:09:11,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 226 transitions, 2018 flow [2023-08-30 15:09:11,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 226 transitions, 2017 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:09:11,580 INFO L231 Difference]: Finished difference. Result has 68 places, 139 transitions, 1657 flow [2023-08-30 15:09:11,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1657, PETRI_PLACES=68, PETRI_TRANSITIONS=139} [2023-08-30 15:09:11,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2023-08-30 15:09:11,581 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 139 transitions, 1657 flow [2023-08-30 15:09:11,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 91.4) internal successors, (914), 10 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:11,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:11,581 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-30 15:09:11,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 15:09:11,786 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,SelfDestructingSolverStorable10 [2023-08-30 15:09:11,786 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:11,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:11,787 INFO L85 PathProgramCache]: Analyzing trace with hash -86438592, now seen corresponding path program 1 times [2023-08-30 15:09:11,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:11,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903669799] [2023-08-30 15:09:11,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:11,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:11,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:11,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903669799] [2023-08-30 15:09:11,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903669799] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:09:11,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112339004] [2023-08-30 15:09:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:11,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:11,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:09:11,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:09:11,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 15:09:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:11,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 15:09:11,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:09:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:12,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:09:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:12,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112339004] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:09:12,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:09:12,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-08-30 15:09:12,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450489549] [2023-08-30 15:09:12,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:09:12,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 15:09:12,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:12,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 15:09:12,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-08-30 15:09:12,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 15:09:12,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 139 transitions, 1657 flow. Second operand has 11 states, 11 states have (on average 91.36363636363636) internal successors, (1005), 11 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:12,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:12,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 15:09:12,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:14,218 INFO L130 PetriNetUnfolder]: 6123/9849 cut-off events. [2023-08-30 15:09:14,219 INFO L131 PetriNetUnfolder]: For 60610/60610 co-relation queries the response was YES. [2023-08-30 15:09:14,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45669 conditions, 9849 events. 6123/9849 cut-off events. For 60610/60610 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 66990 event pairs, 193 based on Foata normal form. 106/9427 useless extension candidates. Maximal degree in co-relation 45642. Up to 3347 conditions per place. [2023-08-30 15:09:14,313 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 296 selfloop transitions, 148 changer transitions 0/448 dead transitions. [2023-08-30 15:09:14,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 448 transitions, 5266 flow [2023-08-30 15:09:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:09:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:09:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1680 transitions. [2023-08-30 15:09:14,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42168674698795183 [2023-08-30 15:09:14,318 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1680 transitions. [2023-08-30 15:09:14,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1680 transitions. [2023-08-30 15:09:14,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:14,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1680 transitions. [2023-08-30 15:09:14,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 105.0) internal successors, (1680), 16 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:14,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:14,329 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:14,330 INFO L175 Difference]: Start difference. First operand has 68 places, 139 transitions, 1657 flow. Second operand 16 states and 1680 transitions. [2023-08-30 15:09:14,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 448 transitions, 5266 flow [2023-08-30 15:09:14,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 448 transitions, 4619 flow, removed 242 selfloop flow, removed 4 redundant places. [2023-08-30 15:09:14,463 INFO L231 Difference]: Finished difference. Result has 90 places, 248 transitions, 3271 flow [2023-08-30 15:09:14,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3271, PETRI_PLACES=90, PETRI_TRANSITIONS=248} [2023-08-30 15:09:14,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2023-08-30 15:09:14,464 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 248 transitions, 3271 flow [2023-08-30 15:09:14,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 91.36363636363636) internal successors, (1005), 11 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:14,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:14,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:09:14,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 15:09:14,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:14,671 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:14,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:14,672 INFO L85 PathProgramCache]: Analyzing trace with hash -178247048, now seen corresponding path program 1 times [2023-08-30 15:09:14,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:14,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780044527] [2023-08-30 15:09:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:14,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:14,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:14,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780044527] [2023-08-30 15:09:14,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780044527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:09:14,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5918820] [2023-08-30 15:09:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:14,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:14,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:09:14,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:09:14,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 15:09:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:14,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 15:09:14,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:09:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:09:15,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:09:15,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5918820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:09:15,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:09:15,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-30 15:09:15,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174805876] [2023-08-30 15:09:15,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:09:15,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:09:15,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:15,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:09:15,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:09:15,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 15:09:15,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 248 transitions, 3271 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:15,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:15,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 15:09:15,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:16,212 INFO L130 PetriNetUnfolder]: 5341/8748 cut-off events. [2023-08-30 15:09:16,212 INFO L131 PetriNetUnfolder]: For 84324/84324 co-relation queries the response was YES. [2023-08-30 15:09:16,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41629 conditions, 8748 events. 5341/8748 cut-off events. For 84324/84324 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 62753 event pairs, 3525 based on Foata normal form. 658/8859 useless extension candidates. Maximal degree in co-relation 41591. Up to 8244 conditions per place. [2023-08-30 15:09:16,304 INFO L137 encePairwiseOnDemand]: 247/249 looper letters, 194 selfloop transitions, 1 changer transitions 0/199 dead transitions. [2023-08-30 15:09:16,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 199 transitions, 3011 flow [2023-08-30 15:09:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:09:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:09:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-08-30 15:09:16,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3989290495314592 [2023-08-30 15:09:16,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-08-30 15:09:16,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-08-30 15:09:16,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:16,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-08-30 15:09:16,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:16,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:16,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:16,310 INFO L175 Difference]: Start difference. First operand has 90 places, 248 transitions, 3271 flow. Second operand 3 states and 298 transitions. [2023-08-30 15:09:16,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 199 transitions, 3011 flow [2023-08-30 15:09:16,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 199 transitions, 2825 flow, removed 86 selfloop flow, removed 4 redundant places. [2023-08-30 15:09:16,658 INFO L231 Difference]: Finished difference. Result has 86 places, 199 transitions, 2437 flow [2023-08-30 15:09:16,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2437, PETRI_PLACES=86, PETRI_TRANSITIONS=199} [2023-08-30 15:09:16,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2023-08-30 15:09:16,659 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 199 transitions, 2437 flow [2023-08-30 15:09:16,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:16,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:16,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:09:16,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 15:09:16,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:16,860 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:16,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:16,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1511696266, now seen corresponding path program 1 times [2023-08-30 15:09:16,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:16,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890767469] [2023-08-30 15:09:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:16,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:17,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:17,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890767469] [2023-08-30 15:09:17,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890767469] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:09:17,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717164700] [2023-08-30 15:09:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:17,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:17,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:09:17,003 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:09:17,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 15:09:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:17,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 15:09:17,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:09:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:17,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:09:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:17,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717164700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:09:17,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:09:17,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2023-08-30 15:09:17,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76801223] [2023-08-30 15:09:17,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:09:17,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 15:09:17,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:17,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 15:09:17,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:09:17,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 15:09:17,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 199 transitions, 2437 flow. Second operand has 8 states, 8 states have (on average 90.375) internal successors, (723), 8 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:17,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:17,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 15:09:17,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:19,481 INFO L130 PetriNetUnfolder]: 9911/16699 cut-off events. [2023-08-30 15:09:19,481 INFO L131 PetriNetUnfolder]: For 133792/133792 co-relation queries the response was YES. [2023-08-30 15:09:19,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76418 conditions, 16699 events. 9911/16699 cut-off events. For 133792/133792 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 131126 event pairs, 791 based on Foata normal form. 236/16679 useless extension candidates. Maximal degree in co-relation 76380. Up to 4133 conditions per place. [2023-08-30 15:09:19,607 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 446 selfloop transitions, 100 changer transitions 0/550 dead transitions. [2023-08-30 15:09:19,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 550 transitions, 7735 flow [2023-08-30 15:09:19,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 15:09:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 15:09:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 813 transitions. [2023-08-30 15:09:19,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40813253012048195 [2023-08-30 15:09:19,610 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 813 transitions. [2023-08-30 15:09:19,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 813 transitions. [2023-08-30 15:09:19,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:19,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 813 transitions. [2023-08-30 15:09:19,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 101.625) internal successors, (813), 8 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:19,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:19,616 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:19,616 INFO L175 Difference]: Start difference. First operand has 86 places, 199 transitions, 2437 flow. Second operand 8 states and 813 transitions. [2023-08-30 15:09:19,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 550 transitions, 7735 flow [2023-08-30 15:09:20,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 550 transitions, 7734 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:09:20,191 INFO L231 Difference]: Finished difference. Result has 95 places, 246 transitions, 3536 flow [2023-08-30 15:09:20,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3536, PETRI_PLACES=95, PETRI_TRANSITIONS=246} [2023-08-30 15:09:20,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2023-08-30 15:09:20,192 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 246 transitions, 3536 flow [2023-08-30 15:09:20,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 90.375) internal successors, (723), 8 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:20,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:20,193 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:09:20,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 15:09:20,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 15:09:20,399 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:20,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:20,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2048919237, now seen corresponding path program 1 times [2023-08-30 15:09:20,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:20,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108596205] [2023-08-30 15:09:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:20,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:20,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:20,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108596205] [2023-08-30 15:09:20,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108596205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:09:20,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793425403] [2023-08-30 15:09:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:20,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:20,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:09:20,608 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:09:20,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 15:09:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:20,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:09:20,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:09:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:20,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:09:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:21,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793425403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:09:21,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:09:21,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 15:09:21,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165600742] [2023-08-30 15:09:21,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:09:21,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 15:09:21,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:21,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 15:09:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:09:21,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 15:09:21,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 246 transitions, 3536 flow. Second operand has 14 states, 14 states have (on average 89.71428571428571) internal successors, (1256), 14 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:21,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:21,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 15:09:21,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:26,271 INFO L130 PetriNetUnfolder]: 18105/29459 cut-off events. [2023-08-30 15:09:26,271 INFO L131 PetriNetUnfolder]: For 378216/378216 co-relation queries the response was YES. [2023-08-30 15:09:26,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152546 conditions, 29459 events. 18105/29459 cut-off events. For 378216/378216 co-relation queries the response was YES. Maximal size of possible extension queue 1744. Compared 238805 event pairs, 409 based on Foata normal form. 1388/30789 useless extension candidates. Maximal degree in co-relation 152504. Up to 7793 conditions per place. [2023-08-30 15:09:26,516 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 276 selfloop transitions, 422 changer transitions 0/702 dead transitions. [2023-08-30 15:09:26,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 702 transitions, 10474 flow [2023-08-30 15:09:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 15:09:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 15:09:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1932 transitions. [2023-08-30 15:09:26,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083703233988586 [2023-08-30 15:09:26,524 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1932 transitions. [2023-08-30 15:09:26,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1932 transitions. [2023-08-30 15:09:26,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:26,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1932 transitions. [2023-08-30 15:09:26,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 101.6842105263158) internal successors, (1932), 19 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:26,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 249.0) internal successors, (4980), 20 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:26,538 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 249.0) internal successors, (4980), 20 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:26,538 INFO L175 Difference]: Start difference. First operand has 95 places, 246 transitions, 3536 flow. Second operand 19 states and 1932 transitions. [2023-08-30 15:09:26,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 702 transitions, 10474 flow [2023-08-30 15:09:28,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 702 transitions, 10380 flow, removed 39 selfloop flow, removed 2 redundant places. [2023-08-30 15:09:28,074 INFO L231 Difference]: Finished difference. Result has 124 places, 549 transitions, 10282 flow [2023-08-30 15:09:28,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10282, PETRI_PLACES=124, PETRI_TRANSITIONS=549} [2023-08-30 15:09:28,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2023-08-30 15:09:28,075 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 549 transitions, 10282 flow [2023-08-30 15:09:28,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 89.71428571428571) internal successors, (1256), 14 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:28,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:28,075 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:09:28,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 15:09:28,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 15:09:28,276 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:28,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:28,277 INFO L85 PathProgramCache]: Analyzing trace with hash 745819166, now seen corresponding path program 1 times [2023-08-30 15:09:28,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:28,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793394533] [2023-08-30 15:09:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:28,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:28,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:28,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793394533] [2023-08-30 15:09:28,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793394533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:09:28,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364016476] [2023-08-30 15:09:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:28,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:28,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:09:28,501 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:09:28,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 15:09:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:28,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 15:09:28,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:09:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:09:28,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:09:28,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364016476] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:09:28,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:09:28,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-08-30 15:09:28,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95596813] [2023-08-30 15:09:28,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:09:28,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:09:28,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:28,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:09:28,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:09:28,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-08-30 15:09:28,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 549 transitions, 10282 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:28,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:28,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-08-30 15:09:28,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:33,527 INFO L130 PetriNetUnfolder]: 15757/25922 cut-off events. [2023-08-30 15:09:33,528 INFO L131 PetriNetUnfolder]: For 538690/538690 co-relation queries the response was YES. [2023-08-30 15:09:33,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151052 conditions, 25922 events. 15757/25922 cut-off events. For 538690/538690 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 217034 event pairs, 10381 based on Foata normal form. 1592/27315 useless extension candidates. Maximal degree in co-relation 150997. Up to 24142 conditions per place. [2023-08-30 15:09:33,826 INFO L137 encePairwiseOnDemand]: 247/249 looper letters, 438 selfloop transitions, 1 changer transitions 0/443 dead transitions. [2023-08-30 15:09:33,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 443 transitions, 9156 flow [2023-08-30 15:09:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:09:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:09:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-08-30 15:09:33,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39759036144578314 [2023-08-30 15:09:33,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-08-30 15:09:33,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-08-30 15:09:33,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:33,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-08-30 15:09:33,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:33,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:33,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:33,830 INFO L175 Difference]: Start difference. First operand has 124 places, 549 transitions, 10282 flow. Second operand 3 states and 297 transitions. [2023-08-30 15:09:33,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 443 transitions, 9156 flow [2023-08-30 15:09:37,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 443 transitions, 7977 flow, removed 537 selfloop flow, removed 2 redundant places. [2023-08-30 15:09:37,986 INFO L231 Difference]: Finished difference. Result has 121 places, 443 transitions, 7101 flow [2023-08-30 15:09:37,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7099, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7101, PETRI_PLACES=121, PETRI_TRANSITIONS=443} [2023-08-30 15:09:37,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2023-08-30 15:09:37,986 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 443 transitions, 7101 flow [2023-08-30 15:09:37,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:37,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:37,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:09:37,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 15:09:38,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:38,198 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:38,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2048284621, now seen corresponding path program 1 times [2023-08-30 15:09:38,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:38,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358026129] [2023-08-30 15:09:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:38,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:38,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:38,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358026129] [2023-08-30 15:09:38,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358026129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:09:38,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718642683] [2023-08-30 15:09:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:38,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:38,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:09:38,373 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:09:38,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 15:09:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:38,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 15:09:38,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:09:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:38,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:09:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:39,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718642683] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:09:39,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:09:39,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 15:09:39,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174163895] [2023-08-30 15:09:39,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:09:39,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 15:09:39,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:39,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 15:09:39,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2023-08-30 15:09:39,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 249 [2023-08-30 15:09:39,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 443 transitions, 7101 flow. Second operand has 13 states, 13 states have (on average 86.76923076923077) internal successors, (1128), 13 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:39,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:39,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 249 [2023-08-30 15:09:39,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:45,424 INFO L130 PetriNetUnfolder]: 17833/29679 cut-off events. [2023-08-30 15:09:45,424 INFO L131 PetriNetUnfolder]: For 468780/468780 co-relation queries the response was YES. [2023-08-30 15:09:45,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158697 conditions, 29679 events. 17833/29679 cut-off events. For 468780/468780 co-relation queries the response was YES. Maximal size of possible extension queue 1871. Compared 248962 event pairs, 511 based on Foata normal form. 886/30561 useless extension candidates. Maximal degree in co-relation 158642. Up to 12071 conditions per place. [2023-08-30 15:09:45,760 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 332 selfloop transitions, 363 changer transitions 0/699 dead transitions. [2023-08-30 15:09:45,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 699 transitions, 11278 flow [2023-08-30 15:09:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 15:09:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 15:09:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1657 transitions. [2023-08-30 15:09:45,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39144814552326956 [2023-08-30 15:09:45,765 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1657 transitions. [2023-08-30 15:09:45,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1657 transitions. [2023-08-30 15:09:45,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:45,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1657 transitions. [2023-08-30 15:09:45,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 97.47058823529412) internal successors, (1657), 17 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:45,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 249.0) internal successors, (4482), 18 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:45,776 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 249.0) internal successors, (4482), 18 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:45,777 INFO L175 Difference]: Start difference. First operand has 121 places, 443 transitions, 7101 flow. Second operand 17 states and 1657 transitions. [2023-08-30 15:09:45,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 699 transitions, 11278 flow [2023-08-30 15:09:49,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 699 transitions, 11277 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:09:49,142 INFO L231 Difference]: Finished difference. Result has 143 places, 569 transitions, 10874 flow [2023-08-30 15:09:49,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=6870, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10874, PETRI_PLACES=143, PETRI_TRANSITIONS=569} [2023-08-30 15:09:49,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2023-08-30 15:09:49,143 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 569 transitions, 10874 flow [2023-08-30 15:09:49,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 86.76923076923077) internal successors, (1128), 13 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:49,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:09:49,144 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1] [2023-08-30 15:09:49,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 15:09:49,349 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,SelfDestructingSolverStorable16 [2023-08-30 15:09:49,350 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:09:49,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:09:49,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1582341477, now seen corresponding path program 2 times [2023-08-30 15:09:49,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:09:49,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245258626] [2023-08-30 15:09:49,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:09:49,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:09:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:09:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:49,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:09:49,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245258626] [2023-08-30 15:09:49,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245258626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:09:49,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748402887] [2023-08-30 15:09:49,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:09:49,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:09:49,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:09:49,707 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:09:49,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 15:09:49,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:09:49,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:09:49,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 15:09:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:09:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:50,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:09:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:09:51,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748402887] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:09:51,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:09:51,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 15:09:51,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768874669] [2023-08-30 15:09:51,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:09:51,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 15:09:51,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:09:51,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 15:09:51,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2023-08-30 15:09:51,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 15:09:51,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 569 transitions, 10874 flow. Second operand has 16 states, 16 states have (on average 91.1875) internal successors, (1459), 16 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:51,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:09:51,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 15:09:51,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:09:58,736 INFO L130 PetriNetUnfolder]: 20451/33925 cut-off events. [2023-08-30 15:09:58,736 INFO L131 PetriNetUnfolder]: For 712542/712542 co-relation queries the response was YES. [2023-08-30 15:09:58,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199623 conditions, 33925 events. 20451/33925 cut-off events. For 712542/712542 co-relation queries the response was YES. Maximal size of possible extension queue 2048. Compared 285785 event pairs, 1229 based on Foata normal form. 802/34723 useless extension candidates. Maximal degree in co-relation 199560. Up to 16843 conditions per place. [2023-08-30 15:09:59,132 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 539 selfloop transitions, 412 changer transitions 0/955 dead transitions. [2023-08-30 15:09:59,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 955 transitions, 16973 flow [2023-08-30 15:09:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 15:09:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 15:09:59,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2747 transitions. [2023-08-30 15:09:59,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40859735237245276 [2023-08-30 15:09:59,138 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2747 transitions. [2023-08-30 15:09:59,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2747 transitions. [2023-08-30 15:09:59,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:09:59,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2747 transitions. [2023-08-30 15:09:59,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 101.74074074074075) internal successors, (2747), 27 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:59,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 249.0) internal successors, (6972), 28 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:59,153 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 249.0) internal successors, (6972), 28 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:09:59,153 INFO L175 Difference]: Start difference. First operand has 143 places, 569 transitions, 10874 flow. Second operand 27 states and 2747 transitions. [2023-08-30 15:09:59,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 955 transitions, 16973 flow [2023-08-30 15:10:06,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 955 transitions, 15736 flow, removed 551 selfloop flow, removed 6 redundant places. [2023-08-30 15:10:06,330 INFO L231 Difference]: Finished difference. Result has 176 places, 747 transitions, 14869 flow [2023-08-30 15:10:06,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=9567, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14869, PETRI_PLACES=176, PETRI_TRANSITIONS=747} [2023-08-30 15:10:06,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2023-08-30 15:10:06,331 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 747 transitions, 14869 flow [2023-08-30 15:10:06,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.1875) internal successors, (1459), 16 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:10:06,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:10:06,332 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:10:06,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 15:10:06,538 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,SelfDestructingSolverStorable17 [2023-08-30 15:10:06,538 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:10:06,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:10:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1375895626, now seen corresponding path program 2 times [2023-08-30 15:10:06,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:10:06,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297052757] [2023-08-30 15:10:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:10:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:10:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:10:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:10:06,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:10:06,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297052757] [2023-08-30 15:10:06,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297052757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:10:06,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204714308] [2023-08-30 15:10:06,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:10:06,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:10:06,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:10:06,857 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:10:06,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 15:10:06,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:10:06,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:10:06,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:10:06,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:10:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:10:07,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:10:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:10:07,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204714308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:10:07,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:10:07,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-30 15:10:07,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950326853] [2023-08-30 15:10:07,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:10:07,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 15:10:07,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:10:07,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 15:10:07,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-30 15:10:07,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-08-30 15:10:07,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 747 transitions, 14869 flow. Second operand has 15 states, 15 states have (on average 91.8) internal successors, (1377), 15 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:10:07,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:10:07,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-08-30 15:10:07,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:10:18,082 INFO L130 PetriNetUnfolder]: 24901/41205 cut-off events. [2023-08-30 15:10:18,082 INFO L131 PetriNetUnfolder]: For 1026238/1026238 co-relation queries the response was YES. [2023-08-30 15:10:18,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248652 conditions, 41205 events. 24901/41205 cut-off events. For 1026238/1026238 co-relation queries the response was YES. Maximal size of possible extension queue 2556. Compared 354685 event pairs, 1201 based on Foata normal form. 1174/42375 useless extension candidates. Maximal degree in co-relation 248576. Up to 16759 conditions per place. [2023-08-30 15:10:18,673 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 647 selfloop transitions, 683 changer transitions 0/1334 dead transitions. [2023-08-30 15:10:18,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1334 transitions, 25953 flow [2023-08-30 15:10:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 15:10:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 15:10:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3379 transitions. [2023-08-30 15:10:18,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112206401363028 [2023-08-30 15:10:18,679 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3379 transitions. [2023-08-30 15:10:18,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3379 transitions. [2023-08-30 15:10:18,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:10:18,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3379 transitions. [2023-08-30 15:10:18,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 102.39393939393939) internal successors, (3379), 33 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:10:18,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 249.0) internal successors, (8466), 34 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:10:18,693 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 249.0) internal successors, (8466), 34 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:10:18,693 INFO L175 Difference]: Start difference. First operand has 176 places, 747 transitions, 14869 flow. Second operand 33 states and 3379 transitions. [2023-08-30 15:10:18,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1334 transitions, 25953 flow [2023-08-30 15:10:29,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 1334 transitions, 24205 flow, removed 866 selfloop flow, removed 4 redundant places. [2023-08-30 15:10:29,824 INFO L231 Difference]: Finished difference. Result has 221 places, 1060 transitions, 22782 flow [2023-08-30 15:10:29,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=13368, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=22782, PETRI_PLACES=221, PETRI_TRANSITIONS=1060} [2023-08-30 15:10:29,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2023-08-30 15:10:29,825 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 1060 transitions, 22782 flow [2023-08-30 15:10:29,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 91.8) internal successors, (1377), 15 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:10:29,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:10:29,826 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:10:29,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 15:10:30,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:10:30,027 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:10:30,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:10:30,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1477056893, now seen corresponding path program 1 times [2023-08-30 15:10:30,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:10:30,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416470583] [2023-08-30 15:10:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:10:30,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:10:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:10:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:10:30,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:10:30,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416470583] [2023-08-30 15:10:30,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416470583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:10:30,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634749308] [2023-08-30 15:10:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:10:30,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:10:30,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:10:30,403 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:10:30,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 15:10:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:10:30,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 15:10:30,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:10:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:10:30,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:10:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:10:33,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634749308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:10:33,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:10:33,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-30 15:10:33,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412935327] [2023-08-30 15:10:33,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:10:33,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 15:10:33,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:10:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 15:10:33,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2023-08-30 15:10:33,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 249 [2023-08-30 15:10:33,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 1060 transitions, 22782 flow. Second operand has 19 states, 19 states have (on average 86.52631578947368) internal successors, (1644), 19 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:10:33,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:10:33,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 249 [2023-08-30 15:10:33,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:10:49,951 INFO L130 PetriNetUnfolder]: 31263/51525 cut-off events. [2023-08-30 15:10:49,951 INFO L131 PetriNetUnfolder]: For 1650934/1650934 co-relation queries the response was YES. [2023-08-30 15:10:50,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339006 conditions, 51525 events. 31263/51525 cut-off events. For 1650934/1650934 co-relation queries the response was YES. Maximal size of possible extension queue 3119. Compared 451564 event pairs, 317 based on Foata normal form. 2072/53581 useless extension candidates. Maximal degree in co-relation 338914. Up to 13147 conditions per place. [2023-08-30 15:10:51,002 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 545 selfloop transitions, 991 changer transitions 0/1540 dead transitions. [2023-08-30 15:10:51,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1540 transitions, 33801 flow [2023-08-30 15:10:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 15:10:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 15:10:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2557 transitions. [2023-08-30 15:10:51,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39496447327772627 [2023-08-30 15:10:51,006 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2557 transitions. [2023-08-30 15:10:51,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2557 transitions. [2023-08-30 15:10:51,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:10:51,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2557 transitions. [2023-08-30 15:10:51,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 98.34615384615384) internal successors, (2557), 26 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:10:51,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:10:51,016 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:10:51,017 INFO L175 Difference]: Start difference. First operand has 221 places, 1060 transitions, 22782 flow. Second operand 26 states and 2557 transitions. [2023-08-30 15:10:51,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1540 transitions, 33801 flow [2023-08-30 15:11:14,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 1540 transitions, 30447 flow, removed 1666 selfloop flow, removed 4 redundant places. [2023-08-30 15:11:14,318 INFO L231 Difference]: Finished difference. Result has 250 places, 1324 transitions, 30042 flow [2023-08-30 15:11:14,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=18720, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=968, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=30042, PETRI_PLACES=250, PETRI_TRANSITIONS=1324} [2023-08-30 15:11:14,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2023-08-30 15:11:14,319 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 1324 transitions, 30042 flow [2023-08-30 15:11:14,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.52631578947368) internal successors, (1644), 19 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:11:14,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:11:14,320 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:11:14,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 15:11:14,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:11:14,520 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:11:14,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:11:14,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1964001879, now seen corresponding path program 1 times [2023-08-30 15:11:14,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:11:14,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521458304] [2023-08-30 15:11:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:11:14,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:11:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:11:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:11:14,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:11:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521458304] [2023-08-30 15:11:14,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521458304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:11:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344395324] [2023-08-30 15:11:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:11:14,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:11:14,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:11:14,693 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:11:14,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 15:11:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:11:14,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 15:11:14,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:11:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:11:15,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:11:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:11:16,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344395324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:11:16,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:11:16,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2023-08-30 15:11:16,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353903397] [2023-08-30 15:11:16,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:11:16,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 15:11:16,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:11:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 15:11:16,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-08-30 15:11:16,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 15:11:16,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 1324 transitions, 30042 flow. Second operand has 15 states, 15 states have (on average 89.86666666666666) internal successors, (1348), 15 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:11:16,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:11:16,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 15:11:16,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:11:41,795 INFO L130 PetriNetUnfolder]: 41499/69255 cut-off events. [2023-08-30 15:11:41,795 INFO L131 PetriNetUnfolder]: For 2162210/2162210 co-relation queries the response was YES. [2023-08-30 15:11:43,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460192 conditions, 69255 events. 41499/69255 cut-off events. For 2162210/2162210 co-relation queries the response was YES. Maximal size of possible extension queue 4287. Compared 643123 event pairs, 3019 based on Foata normal form. 1950/71189 useless extension candidates. Maximal degree in co-relation 460092. Up to 19547 conditions per place. [2023-08-30 15:11:43,440 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 1448 selfloop transitions, 758 changer transitions 0/2210 dead transitions. [2023-08-30 15:11:43,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 2210 transitions, 53380 flow [2023-08-30 15:11:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 15:11:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 15:11:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1945 transitions. [2023-08-30 15:11:43,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41111815683787784 [2023-08-30 15:11:43,442 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1945 transitions. [2023-08-30 15:11:43,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1945 transitions. [2023-08-30 15:11:43,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:11:43,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1945 transitions. [2023-08-30 15:11:43,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 102.36842105263158) internal successors, (1945), 19 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:11:43,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 249.0) internal successors, (4980), 20 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:11:43,450 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 249.0) internal successors, (4980), 20 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:11:43,450 INFO L175 Difference]: Start difference. First operand has 250 places, 1324 transitions, 30042 flow. Second operand 19 states and 1945 transitions. [2023-08-30 15:11:43,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 2210 transitions, 53380 flow [2023-08-30 15:12:32,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 2210 transitions, 47501 flow, removed 2857 selfloop flow, removed 8 redundant places. [2023-08-30 15:12:32,978 INFO L231 Difference]: Finished difference. Result has 270 places, 1605 transitions, 36440 flow [2023-08-30 15:12:32,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=24330, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=36440, PETRI_PLACES=270, PETRI_TRANSITIONS=1605} [2023-08-30 15:12:32,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2023-08-30 15:12:32,980 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 1605 transitions, 36440 flow [2023-08-30 15:12:32,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 89.86666666666666) internal successors, (1348), 15 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:12:32,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:12:32,981 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:12:32,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 15:12:33,187 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,SelfDestructingSolverStorable20 [2023-08-30 15:12:33,187 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:12:33,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:12:33,187 INFO L85 PathProgramCache]: Analyzing trace with hash 224585094, now seen corresponding path program 1 times [2023-08-30 15:12:33,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:12:33,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062103086] [2023-08-30 15:12:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:12:33,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:12:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:12:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:12:33,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:12:33,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062103086] [2023-08-30 15:12:33,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062103086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:12:33,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084480858] [2023-08-30 15:12:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:12:33,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:12:33,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:12:33,461 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:12:33,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 15:12:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:12:33,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 15:12:33,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:12:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:12:33,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:12:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:12:35,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084480858] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:12:35,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:12:35,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 15:12:35,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345513752] [2023-08-30 15:12:35,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:12:35,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:12:35,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:12:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:12:35,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2023-08-30 15:12:36,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 15:12:36,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 1605 transitions, 36440 flow. Second operand has 20 states, 20 states have (on average 89.5) internal successors, (1790), 20 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:12:36,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:12:36,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 15:12:36,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:13:17,138 INFO L130 PetriNetUnfolder]: 56755/93209 cut-off events. [2023-08-30 15:13:17,138 INFO L131 PetriNetUnfolder]: For 3150932/3150932 co-relation queries the response was YES. [2023-08-30 15:13:19,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609810 conditions, 93209 events. 56755/93209 cut-off events. For 3150932/3150932 co-relation queries the response was YES. Maximal size of possible extension queue 5699. Compared 877130 event pairs, 2097 based on Foata normal form. 4112/97305 useless extension candidates. Maximal degree in co-relation 609700. Up to 29821 conditions per place. [2023-08-30 15:13:19,687 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 858 selfloop transitions, 1739 changer transitions 0/2601 dead transitions. [2023-08-30 15:13:19,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 2601 transitions, 61309 flow [2023-08-30 15:13:19,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 15:13:19,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 15:13:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3001 transitions. [2023-08-30 15:13:19,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017402945113788 [2023-08-30 15:13:19,693 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3001 transitions. [2023-08-30 15:13:19,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3001 transitions. [2023-08-30 15:13:19,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:13:19,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3001 transitions. [2023-08-30 15:13:19,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 100.03333333333333) internal successors, (3001), 30 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:13:19,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 249.0) internal successors, (7719), 31 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:13:19,706 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 249.0) internal successors, (7719), 31 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:13:19,706 INFO L175 Difference]: Start difference. First operand has 270 places, 1605 transitions, 36440 flow. Second operand 30 states and 3001 transitions. [2023-08-30 15:13:19,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 2601 transitions, 61309 flow [2023-08-30 15:14:49,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 2601 transitions, 60004 flow, removed 639 selfloop flow, removed 5 redundant places. [2023-08-30 15:14:49,285 INFO L231 Difference]: Finished difference. Result has 312 places, 2351 transitions, 60522 flow [2023-08-30 15:14:49,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=33938, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=60522, PETRI_PLACES=312, PETRI_TRANSITIONS=2351} [2023-08-30 15:14:49,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2023-08-30 15:14:49,286 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 2351 transitions, 60522 flow [2023-08-30 15:14:49,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 89.5) internal successors, (1790), 20 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:14:49,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:14:49,287 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:14:49,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 15:14:49,487 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,SelfDestructingSolverStorable21 [2023-08-30 15:14:49,487 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:14:49,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:14:49,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1940308919, now seen corresponding path program 2 times [2023-08-30 15:14:49,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:14:49,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715477963] [2023-08-30 15:14:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:14:49,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:14:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:14:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:14:49,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:14:49,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715477963] [2023-08-30 15:14:49,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715477963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:14:49,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687640901] [2023-08-30 15:14:49,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:14:49,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:14:49,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:14:49,697 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:14:49,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 15:14:49,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:14:49,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:14:49,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:14:49,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:14:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:14:50,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:14:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:14:52,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687640901] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:14:52,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:14:52,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-08-30 15:14:52,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792866926] [2023-08-30 15:14:52,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:14:52,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 15:14:52,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:14:52,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 15:14:52,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2023-08-30 15:14:52,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 15:14:52,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 2351 transitions, 60522 flow. Second operand has 19 states, 19 states have (on average 89.57894736842105) internal successors, (1702), 19 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:14:52,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:14:52,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 15:14:52,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:16:04,649 INFO L130 PetriNetUnfolder]: 72287/119703 cut-off events. [2023-08-30 15:16:04,649 INFO L131 PetriNetUnfolder]: For 5099136/5099136 co-relation queries the response was YES. [2023-08-30 15:16:07,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872125 conditions, 119703 events. 72287/119703 cut-off events. For 5099136/5099136 co-relation queries the response was YES. Maximal size of possible extension queue 6966. Compared 1173926 event pairs, 3787 based on Foata normal form. 3428/123115 useless extension candidates. Maximal degree in co-relation 871996. Up to 25569 conditions per place. [2023-08-30 15:16:08,413 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 1906 selfloop transitions, 1962 changer transitions 0/3872 dead transitions. [2023-08-30 15:16:08,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 3872 transitions, 105991 flow [2023-08-30 15:16:08,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 15:16:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 15:16:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3408 transitions. [2023-08-30 15:16:08,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025513819985826 [2023-08-30 15:16:08,418 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3408 transitions. [2023-08-30 15:16:08,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3408 transitions. [2023-08-30 15:16:08,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:16:08,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3408 transitions. [2023-08-30 15:16:08,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 100.23529411764706) internal successors, (3408), 34 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:16:08,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 249.0) internal successors, (8715), 35 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:16:08,431 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 249.0) internal successors, (8715), 35 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:16:08,431 INFO L175 Difference]: Start difference. First operand has 312 places, 2351 transitions, 60522 flow. Second operand 34 states and 3408 transitions. [2023-08-30 15:16:08,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 3872 transitions, 105991 flow [2023-08-30 15:19:31,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 3872 transitions, 100198 flow, removed 2306 selfloop flow, removed 7 redundant places. [2023-08-30 15:19:31,338 INFO L231 Difference]: Finished difference. Result has 351 places, 3103 transitions, 86741 flow [2023-08-30 15:19:31,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=51806, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=86741, PETRI_PLACES=351, PETRI_TRANSITIONS=3103} [2023-08-30 15:19:31,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2023-08-30 15:19:31,340 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 3103 transitions, 86741 flow [2023-08-30 15:19:31,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 89.57894736842105) internal successors, (1702), 19 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:31,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:19:31,341 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:19:31,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 15:19:31,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:31,549 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-08-30 15:19:31,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:19:31,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1548000516, now seen corresponding path program 2 times [2023-08-30 15:19:31,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:19:31,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170515513] [2023-08-30 15:19:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:19:31,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:19:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:19:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:32,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:19:32,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170515513] [2023-08-30 15:19:32,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170515513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:19:32,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610053919] [2023-08-30 15:19:32,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:19:32,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:19:32,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:19:32,144 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:19:32,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 15:19:32,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:19:32,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:19:32,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:19:32,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:19:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:32,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:19:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:19:35,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610053919] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:19:35,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:19:35,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 15:19:35,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132154465] [2023-08-30 15:19:35,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:19:35,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 15:19:35,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:19:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 15:19:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2023-08-30 15:19:35,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-08-30 15:19:35,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 3103 transitions, 86741 flow. Second operand has 22 states, 22 states have (on average 89.45454545454545) internal successors, (1968), 22 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:19:35,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:19:35,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-08-30 15:19:35,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:21:19,744 INFO L130 PetriNetUnfolder]: 81313/133805 cut-off events. [2023-08-30 15:21:19,745 INFO L131 PetriNetUnfolder]: For 6365702/6365702 co-relation queries the response was YES. [2023-08-30 15:21:23,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1021664 conditions, 133805 events. 81313/133805 cut-off events. For 6365702/6365702 co-relation queries the response was YES. Maximal size of possible extension queue 7881. Compared 1312961 event pairs, 2935 based on Foata normal form. 3998/137787 useless extension candidates. Maximal degree in co-relation 1021524. Up to 39693 conditions per place. [2023-08-30 15:21:24,414 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 1475 selfloop transitions, 2245 changer transitions 0/3724 dead transitions. [2023-08-30 15:21:24,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 3724 transitions, 106558 flow [2023-08-30 15:21:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 15:21:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 15:21:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3223 transitions. [2023-08-30 15:21:24,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044929718875502 [2023-08-30 15:21:24,418 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3223 transitions. [2023-08-30 15:21:24,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3223 transitions. [2023-08-30 15:21:24,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:21:24,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3223 transitions. [2023-08-30 15:21:24,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 100.71875) internal successors, (3223), 32 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:24,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 249.0) internal successors, (8217), 33 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:24,428 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 249.0) internal successors, (8217), 33 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:21:24,428 INFO L175 Difference]: Start difference. First operand has 351 places, 3103 transitions, 86741 flow. Second operand 32 states and 3223 transitions. [2023-08-30 15:21:24,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 3724 transitions, 106558 flow Killed by 15