./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.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/popl20-difference-det.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 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e --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 15:25:17,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:25:17,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:25:17,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:25:17,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:25:17,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:25:17,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:25:17,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:25:17,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:25:17,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:25:17,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:25:17,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:25:17,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:25:17,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:25:17,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:25:17,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:25:17,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:25:17,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:25:17,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:25:17,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:25:17,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:25:17,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:25:17,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:25:17,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:25:17,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:25:17,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:25:17,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:25:17,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:25:17,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:25:17,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:25:17,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:25:17,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:25:17,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:25:17,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:25:17,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:25:17,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:25:17,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:25:17,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:25:17,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:25:17,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:25:17,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:25:17,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:25:17,891 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:25:17,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:25:17,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:25:17,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:25:17,893 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:25:17,893 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:25:17,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:25:17,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:25:17,894 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:25:17,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:25:17,894 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:25:17,895 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:25:17,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:25:17,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:25:17,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:25:17,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:25:17,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:25:17,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:25:17,896 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:25:17,896 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:25:17,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:25:17,896 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:25:17,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:25:17,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:25:17,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:25:17,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:25:17,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:25:17,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:25:17,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:25:17,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:25:17,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:25:17,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:25:17,898 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:25:17,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:25:17,898 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:25:17,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:25:17,899 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:25:17,899 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:25:18,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:25:18,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:25:18,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:25:18,202 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:25:18,202 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:25:18,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-30 15:25:19,475 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:25:19,677 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:25:19,678 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-30 15:25:19,683 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33efa6874/6b7d17dbe0a54352a8f7953e65910c1b/FLAGfe89bf129 [2023-08-30 15:25:19,694 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33efa6874/6b7d17dbe0a54352a8f7953e65910c1b [2023-08-30 15:25:19,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:25:19,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:25:19,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:25:19,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:25:19,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:25:19,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2369aae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19, skipping insertion in model container [2023-08-30 15:25:19,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:25:19,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:25:19,850 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/popl20-difference-det.wvr.c[2507,2520] [2023-08-30 15:25:19,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:25:19,859 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:25:19,883 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/popl20-difference-det.wvr.c[2507,2520] [2023-08-30 15:25:19,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:25:19,890 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:25:19,890 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:25:19,896 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:25:19,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19 WrapperNode [2023-08-30 15:25:19,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:25:19,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:25:19,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:25:19,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:25:19,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,930 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 130 [2023-08-30 15:25:19,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:25:19,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:25:19,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:25:19,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:25:19,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,964 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:25:19,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:25:19,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:25:19,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:25:19,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19" (1/1) ... [2023-08-30 15:25:19,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:25:19,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:20,010 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 15:25:20,022 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 15:25:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:25:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:25:20,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:25:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:25:20,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:25:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 15:25:20,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 15:25:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 15:25:20,048 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 15:25:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:25:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:25:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:25:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:25:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:25:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:25:20,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:25:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:25:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:25:20,055 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 15:25:20,130 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:25:20,132 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:25:20,515 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:25:20,607 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:25:20,608 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 15:25:20,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:25:20 BoogieIcfgContainer [2023-08-30 15:25:20,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:25:20,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:25:20,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:25:20,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:25:20,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:25:19" (1/3) ... [2023-08-30 15:25:20,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37eadd41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:25:20, skipping insertion in model container [2023-08-30 15:25:20,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:19" (2/3) ... [2023-08-30 15:25:20,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37eadd41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:25:20, skipping insertion in model container [2023-08-30 15:25:20,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:25:20" (3/3) ... [2023-08-30 15:25:20,617 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-08-30 15:25:20,625 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:25:20,632 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:25:20,633 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 15:25:20,633 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:25:20,749 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 15:25:20,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 147 transitions, 326 flow [2023-08-30 15:25:20,889 INFO L130 PetriNetUnfolder]: 9/143 cut-off events. [2023-08-30 15:25:20,889 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 15:25:20,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 143 events. 9/143 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 198 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-30 15:25:20,895 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 147 transitions, 326 flow [2023-08-30 15:25:20,905 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 123 transitions, 267 flow [2023-08-30 15:25:20,909 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:25:20,927 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 123 transitions, 267 flow [2023-08-30 15:25:20,928 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 123 transitions, 267 flow [2023-08-30 15:25:20,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 123 transitions, 267 flow [2023-08-30 15:25:20,958 INFO L130 PetriNetUnfolder]: 8/123 cut-off events. [2023-08-30 15:25:20,959 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 15:25:20,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 123 events. 8/123 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 197 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-30 15:25:20,964 INFO L119 LiptonReduction]: Number of co-enabled transitions 5184 [2023-08-30 15:25:24,904 INFO L134 LiptonReduction]: Checked pairs total: 5873 [2023-08-30 15:25:24,904 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-30 15:25:24,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:25:24,919 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;@21fcaf4c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:25:24,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-08-30 15:25:24,923 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 15:25:24,923 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:25:24,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:24,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 15:25:24,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:25:24,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash 18815922, now seen corresponding path program 1 times [2023-08-30 15:25:24,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:24,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502631136] [2023-08-30 15:25:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:24,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:25,167 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 15:25:25,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:25,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502631136] [2023-08-30 15:25:25,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502631136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:25,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:25,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:25:25,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605043188] [2023-08-30 15:25:25,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:25,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:25,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:25,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:25,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:25,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 15:25:25,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:25,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:25,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 15:25:25,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:27,258 INFO L130 PetriNetUnfolder]: 21542/25755 cut-off events. [2023-08-30 15:25:27,259 INFO L131 PetriNetUnfolder]: For 427/427 co-relation queries the response was YES. [2023-08-30 15:25:27,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52112 conditions, 25755 events. 21542/25755 cut-off events. For 427/427 co-relation queries the response was YES. Maximal size of possible extension queue 1706. Compared 108892 event pairs, 10472 based on Foata normal form. 0/6846 useless extension candidates. Maximal degree in co-relation 44904. Up to 25461 conditions per place. [2023-08-30 15:25:27,436 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 35 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 15:25:27,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 173 flow [2023-08-30 15:25:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2023-08-30 15:25:27,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236220472440944 [2023-08-30 15:25:27,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2023-08-30 15:25:27,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2023-08-30 15:25:27,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:27,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2023-08-30 15:25:27,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:27,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:27,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:27,461 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 107 flow. Second operand 3 states and 399 transitions. [2023-08-30 15:25:27,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 173 flow [2023-08-30 15:25:27,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 15:25:27,492 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 90 flow [2023-08-30 15:25:27,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-30 15:25:27,496 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-08-30 15:25:27,497 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 90 flow [2023-08-30 15:25:27,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:27,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:27,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 15:25:27,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:25:27,498 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:25:27,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:27,499 INFO L85 PathProgramCache]: Analyzing trace with hash 18815991, now seen corresponding path program 1 times [2023-08-30 15:25:27,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:27,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630457906] [2023-08-30 15:25:27,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:27,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:27,563 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 15:25:27,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:27,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630457906] [2023-08-30 15:25:27,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630457906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:27,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:27,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:25:27,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008518618] [2023-08-30 15:25:27,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:27,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:27,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:27,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:27,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:27,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 15:25:27,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:27,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:27,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 15:25:27,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:29,597 INFO L130 PetriNetUnfolder]: 31787/38406 cut-off events. [2023-08-30 15:25:29,597 INFO L131 PetriNetUnfolder]: For 251/251 co-relation queries the response was YES. [2023-08-30 15:25:29,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77346 conditions, 38406 events. 31787/38406 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 2548. Compared 177565 event pairs, 7655 based on Foata normal form. 0/11246 useless extension candidates. Maximal degree in co-relation 77340. Up to 23318 conditions per place. [2023-08-30 15:25:29,906 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 67 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-30 15:25:29,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 72 transitions, 299 flow [2023-08-30 15:25:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:29,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:29,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-30 15:25:29,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616797900262467 [2023-08-30 15:25:29,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-30 15:25:29,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-30 15:25:29,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:29,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-30 15:25:29,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:29,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:29,913 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:29,914 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 90 flow. Second operand 3 states and 428 transitions. [2023-08-30 15:25:29,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 72 transitions, 299 flow [2023-08-30 15:25:29,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 72 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:29,916 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 103 flow [2023-08-30 15:25:29,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-08-30 15:25:29,917 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-08-30 15:25:29,917 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 103 flow [2023-08-30 15:25:29,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:29,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:29,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 15:25:29,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 15:25:29,918 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:25:29,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:29,919 INFO L85 PathProgramCache]: Analyzing trace with hash 18815923, now seen corresponding path program 1 times [2023-08-30 15:25:29,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:29,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568057199] [2023-08-30 15:25:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:29,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:29,957 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 15:25:29,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:29,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568057199] [2023-08-30 15:25:29,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568057199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:29,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:29,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:25:29,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369336921] [2023-08-30 15:25:29,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:29,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:29,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:29,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:29,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:29,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 15:25:29,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:29,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:29,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 15:25:29,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:31,203 INFO L130 PetriNetUnfolder]: 21203/25485 cut-off events. [2023-08-30 15:25:31,203 INFO L131 PetriNetUnfolder]: For 783/967 co-relation queries the response was YES. [2023-08-30 15:25:31,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53637 conditions, 25485 events. 21203/25485 cut-off events. For 783/967 co-relation queries the response was YES. Maximal size of possible extension queue 1909. Compared 110441 event pairs, 3443 based on Foata normal form. 184/8413 useless extension candidates. Maximal degree in co-relation 53630. Up to 22635 conditions per place. [2023-08-30 15:25:31,327 INFO L137 encePairwiseOnDemand]: 247/254 looper letters, 61 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-30 15:25:31,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 288 flow [2023-08-30 15:25:31,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-30 15:25:31,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616797900262467 [2023-08-30 15:25:31,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-30 15:25:31,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-30 15:25:31,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:31,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-30 15:25:31,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:31,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:31,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:31,333 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 103 flow. Second operand 3 states and 428 transitions. [2023-08-30 15:25:31,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 288 flow [2023-08-30 15:25:31,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:31,335 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 117 flow [2023-08-30 15:25:31,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-08-30 15:25:31,336 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-08-30 15:25:31,336 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 117 flow [2023-08-30 15:25:31,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:31,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:31,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:25:31,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 15:25:31,337 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:25:31,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:31,338 INFO L85 PathProgramCache]: Analyzing trace with hash 583296324, now seen corresponding path program 1 times [2023-08-30 15:25:31,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:31,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566013881] [2023-08-30 15:25:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:31,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:31,386 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 15:25:31,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566013881] [2023-08-30 15:25:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566013881] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603720961] [2023-08-30 15:25:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:31,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:31,393 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 15:25:31,422 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 15:25:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:25:31,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:31,524 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 15:25:31,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:31,539 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 15:25:31,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603720961] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:31,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:31,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 15:25:31,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112017402] [2023-08-30 15:25:31,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:31,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:25:31,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:31,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:25:31,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:25:31,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 15:25:31,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 117 flow. Second operand has 7 states, 7 states have (on average 120.42857142857143) internal successors, (843), 7 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:31,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:31,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 15:25:31,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:35,113 INFO L130 PetriNetUnfolder]: 60651/72351 cut-off events. [2023-08-30 15:25:35,113 INFO L131 PetriNetUnfolder]: For 4457/4457 co-relation queries the response was YES. [2023-08-30 15:25:35,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168253 conditions, 72351 events. 60651/72351 cut-off events. For 4457/4457 co-relation queries the response was YES. Maximal size of possible extension queue 3937. Compared 342309 event pairs, 3897 based on Foata normal form. 0/29284 useless extension candidates. Maximal degree in co-relation 168244. Up to 19309 conditions per place. [2023-08-30 15:25:35,471 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 177 selfloop transitions, 9 changer transitions 0/189 dead transitions. [2023-08-30 15:25:35,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 189 transitions, 867 flow [2023-08-30 15:25:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:25:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:25:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1022 transitions. [2023-08-30 15:25:35,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748031496062992 [2023-08-30 15:25:35,475 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1022 transitions. [2023-08-30 15:25:35,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1022 transitions. [2023-08-30 15:25:35,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:35,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1022 transitions. [2023-08-30 15:25:35,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 146.0) internal successors, (1022), 7 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:35,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:35,482 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:35,483 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 117 flow. Second operand 7 states and 1022 transitions. [2023-08-30 15:25:35,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 189 transitions, 867 flow [2023-08-30 15:25:35,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 189 transitions, 863 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:25:35,487 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 172 flow [2023-08-30 15:25:35,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=172, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-08-30 15:25:35,488 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-30 15:25:35,488 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 172 flow [2023-08-30 15:25:35,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.42857142857143) internal successors, (843), 7 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:35,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:35,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:25:35,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:35,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:35,700 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:25:35,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash 583296256, now seen corresponding path program 1 times [2023-08-30 15:25:35,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:35,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841758724] [2023-08-30 15:25:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:35,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:35,752 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 15:25:35,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:35,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841758724] [2023-08-30 15:25:35,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841758724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:35,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071249211] [2023-08-30 15:25:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:35,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:35,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:35,754 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 15:25:35,757 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 15:25:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:35,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:25:35,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:35,822 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 15:25:35,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:35,838 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 15:25:35,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071249211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:35,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:35,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 15:25:35,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882201288] [2023-08-30 15:25:35,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:35,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:25:35,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:35,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:25:35,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:25:35,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 15:25:35,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 121.57142857142857) internal successors, (851), 7 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:35,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:35,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 15:25:35,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:42,838 INFO L130 PetriNetUnfolder]: 110345/134059 cut-off events. [2023-08-30 15:25:42,839 INFO L131 PetriNetUnfolder]: For 34245/34613 co-relation queries the response was YES. [2023-08-30 15:25:43,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327290 conditions, 134059 events. 110345/134059 cut-off events. For 34245/34613 co-relation queries the response was YES. Maximal size of possible extension queue 6518. Compared 721030 event pairs, 14499 based on Foata normal form. 6862/65083 useless extension candidates. Maximal degree in co-relation 327279. Up to 32506 conditions per place. [2023-08-30 15:25:43,510 INFO L137 encePairwiseOnDemand]: 245/254 looper letters, 142 selfloop transitions, 38 changer transitions 0/184 dead transitions. [2023-08-30 15:25:43,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 184 transitions, 979 flow [2023-08-30 15:25:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:25:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:25:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 892 transitions. [2023-08-30 15:25:43,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853018372703412 [2023-08-30 15:25:43,513 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 892 transitions. [2023-08-30 15:25:43,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 892 transitions. [2023-08-30 15:25:43,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:43,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 892 transitions. [2023-08-30 15:25:43,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.66666666666666) internal successors, (892), 6 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,519 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,519 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 172 flow. Second operand 6 states and 892 transitions. [2023-08-30 15:25:43,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 184 transitions, 979 flow [2023-08-30 15:25:43,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 184 transitions, 941 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:43,662 INFO L231 Difference]: Finished difference. Result has 63 places, 77 transitions, 519 flow [2023-08-30 15:25:43,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=519, PETRI_PLACES=63, PETRI_TRANSITIONS=77} [2023-08-30 15:25:43,665 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 11 predicate places. [2023-08-30 15:25:43,668 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 77 transitions, 519 flow [2023-08-30 15:25:43,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 121.57142857142857) internal successors, (851), 7 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:43,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:25:43,678 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 15:25:43,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:43,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:25:43,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:43,875 INFO L85 PathProgramCache]: Analyzing trace with hash 583296302, now seen corresponding path program 1 times [2023-08-30 15:25:43,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:43,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263705729] [2023-08-30 15:25:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:43,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:43,915 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 15:25:43,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:43,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263705729] [2023-08-30 15:25:43,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263705729] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:43,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:43,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:25:43,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858279100] [2023-08-30 15:25:43,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:43,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:43,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:43,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:43,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:43,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 15:25:43,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 519 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:43,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 15:25:43,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:50,465 INFO L130 PetriNetUnfolder]: 96553/118061 cut-off events. [2023-08-30 15:25:50,466 INFO L131 PetriNetUnfolder]: For 116056/116056 co-relation queries the response was YES. [2023-08-30 15:25:50,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328810 conditions, 118061 events. 96553/118061 cut-off events. For 116056/116056 co-relation queries the response was YES. Maximal size of possible extension queue 5783. Compared 616725 event pairs, 43447 based on Foata normal form. 1904/55813 useless extension candidates. Maximal degree in co-relation 328793. Up to 117338 conditions per place. [2023-08-30 15:25:51,015 INFO L137 encePairwiseOnDemand]: 252/254 looper letters, 78 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-30 15:25:51,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 592 flow [2023-08-30 15:25:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2023-08-30 15:25:51,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541994750656168 [2023-08-30 15:25:51,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2023-08-30 15:25:51,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2023-08-30 15:25:51,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:51,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2023-08-30 15:25:51,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:51,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:51,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:51,020 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 519 flow. Second operand 3 states and 413 transitions. [2023-08-30 15:25:51,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 592 flow [2023-08-30 15:25:51,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 550 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-08-30 15:25:51,936 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 352 flow [2023-08-30 15:25:51,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2023-08-30 15:25:51,937 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 11 predicate places. [2023-08-30 15:25:51,937 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 352 flow [2023-08-30 15:25:51,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:51,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:51,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:51,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 15:25:51,938 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:25:51,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:51,938 INFO L85 PathProgramCache]: Analyzing trace with hash -95000540, now seen corresponding path program 1 times [2023-08-30 15:25:51,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:51,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444025253] [2023-08-30 15:25:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:51,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:51,974 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 15:25:51,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:51,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444025253] [2023-08-30 15:25:51,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444025253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:51,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:51,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:25:51,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045910960] [2023-08-30 15:25:51,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:51,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:51,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:51,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:51,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:51,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 15:25:51,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:51,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:51,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 15:25:51,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:58,451 INFO L130 PetriNetUnfolder]: 101469/125083 cut-off events. [2023-08-30 15:25:58,452 INFO L131 PetriNetUnfolder]: For 77616/78200 co-relation queries the response was YES. [2023-08-30 15:25:58,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322522 conditions, 125083 events. 101469/125083 cut-off events. For 77616/78200 co-relation queries the response was YES. Maximal size of possible extension queue 6527. Compared 707672 event pairs, 46543 based on Foata normal form. 584/58472 useless extension candidates. Maximal degree in co-relation 322504. Up to 102189 conditions per place. [2023-08-30 15:25:59,224 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 91 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2023-08-30 15:25:59,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 98 transitions, 689 flow [2023-08-30 15:25:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-08-30 15:25:59,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564304461942258 [2023-08-30 15:25:59,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-08-30 15:25:59,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-08-30 15:25:59,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:59,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-08-30 15:25:59,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:59,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:59,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:59,229 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 352 flow. Second operand 3 states and 424 transitions. [2023-08-30 15:25:59,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 98 transitions, 689 flow [2023-08-30 15:26:00,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 98 transitions, 669 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-30 15:26:00,079 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 389 flow [2023-08-30 15:26:00,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=389, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-08-30 15:26:00,079 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2023-08-30 15:26:00,080 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 389 flow [2023-08-30 15:26:00,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:00,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:00,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:26:00,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 15:26:00,080 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:00,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:00,081 INFO L85 PathProgramCache]: Analyzing trace with hash -90592928, now seen corresponding path program 1 times [2023-08-30 15:26:00,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:00,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232608333] [2023-08-30 15:26:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:00,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:00,144 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 15:26:00,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:00,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232608333] [2023-08-30 15:26:00,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232608333] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:26:00,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:26:00,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:26:00,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630913898] [2023-08-30 15:26:00,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:26:00,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:26:00,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:00,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:26:00,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:26:00,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 15:26:00,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:00,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:00,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 15:26:00,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:05,438 INFO L130 PetriNetUnfolder]: 77955/99496 cut-off events. [2023-08-30 15:26:05,438 INFO L131 PetriNetUnfolder]: For 116618/118308 co-relation queries the response was YES. [2023-08-30 15:26:05,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273214 conditions, 99496 events. 77955/99496 cut-off events. For 116618/118308 co-relation queries the response was YES. Maximal size of possible extension queue 5711. Compared 573672 event pairs, 10703 based on Foata normal form. 1690/52994 useless extension candidates. Maximal degree in co-relation 273196. Up to 90589 conditions per place. [2023-08-30 15:26:05,901 INFO L137 encePairwiseOnDemand]: 244/254 looper letters, 106 selfloop transitions, 4 changer transitions 2/116 dead transitions. [2023-08-30 15:26:05,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 116 transitions, 956 flow [2023-08-30 15:26:05,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:26:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:26:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-08-30 15:26:05,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564304461942258 [2023-08-30 15:26:05,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-08-30 15:26:05,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-08-30 15:26:05,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:05,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-08-30 15:26:05,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:05,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:05,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:05,907 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 389 flow. Second operand 3 states and 424 transitions. [2023-08-30 15:26:05,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 116 transitions, 956 flow [2023-08-30 15:26:05,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 116 transitions, 949 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:26:05,972 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 421 flow [2023-08-30 15:26:05,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-08-30 15:26:05,973 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2023-08-30 15:26:05,973 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 421 flow [2023-08-30 15:26:05,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:05,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:05,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:26:05,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 15:26:05,974 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:05,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:05,975 INFO L85 PathProgramCache]: Analyzing trace with hash -90592878, now seen corresponding path program 1 times [2023-08-30 15:26:05,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:05,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529513789] [2023-08-30 15:26:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:05,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:06,008 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 15:26:06,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:06,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529513789] [2023-08-30 15:26:06,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529513789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:26:06,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:26:06,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:26:06,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910692144] [2023-08-30 15:26:06,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:26:06,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:26:06,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:06,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:26:06,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:26:06,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 15:26:06,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 421 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:06,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:06,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 15:26:06,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:11,811 INFO L130 PetriNetUnfolder]: 78301/101014 cut-off events. [2023-08-30 15:26:11,811 INFO L131 PetriNetUnfolder]: For 102488/105314 co-relation queries the response was YES. [2023-08-30 15:26:11,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319098 conditions, 101014 events. 78301/101014 cut-off events. For 102488/105314 co-relation queries the response was YES. Maximal size of possible extension queue 5767. Compared 630652 event pairs, 48549 based on Foata normal form. 1778/66396 useless extension candidates. Maximal degree in co-relation 319078. Up to 91819 conditions per place. [2023-08-30 15:26:12,324 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 107 selfloop transitions, 2 changer transitions 2/114 dead transitions. [2023-08-30 15:26:12,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 114 transitions, 967 flow [2023-08-30 15:26:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:26:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:26:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2023-08-30 15:26:12,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459317585301837 [2023-08-30 15:26:12,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2023-08-30 15:26:12,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2023-08-30 15:26:12,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:12,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2023-08-30 15:26:12,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:12,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:12,329 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:12,329 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 421 flow. Second operand 3 states and 416 transitions. [2023-08-30 15:26:12,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 114 transitions, 967 flow [2023-08-30 15:26:12,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 965 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:26:12,623 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 413 flow [2023-08-30 15:26:12,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=413, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-08-30 15:26:12,624 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2023-08-30 15:26:12,624 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 413 flow [2023-08-30 15:26:12,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:12,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:12,625 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 15:26:12,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 15:26:12,625 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:12,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:12,626 INFO L85 PathProgramCache]: Analyzing trace with hash -456292621, now seen corresponding path program 2 times [2023-08-30 15:26:12,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:12,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284892760] [2023-08-30 15:26:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:12,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:12,688 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 15:26:12,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:12,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284892760] [2023-08-30 15:26:12,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284892760] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:12,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518842008] [2023-08-30 15:26:12,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:26:12,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:12,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:12,690 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 15:26:12,691 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 15:26:12,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:26:12,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:12,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 15:26:12,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:12,788 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 15:26:12,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:12,833 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 15:26:12,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518842008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:26:12,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:26:12,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 15:26:12,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321598724] [2023-08-30 15:26:12,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:26:12,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 15:26:12,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 15:26:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 15:26:12,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 15:26:12,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 413 flow. Second operand has 13 states, 13 states have (on average 121.3076923076923) internal successors, (1577), 13 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:12,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:12,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 15:26:12,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:27,653 INFO L130 PetriNetUnfolder]: 183717/235635 cut-off events. [2023-08-30 15:26:27,653 INFO L131 PetriNetUnfolder]: For 282517/287411 co-relation queries the response was YES. [2023-08-30 15:26:28,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734241 conditions, 235635 events. 183717/235635 cut-off events. For 282517/287411 co-relation queries the response was YES. Maximal size of possible extension queue 12404. Compared 1572154 event pairs, 24711 based on Foata normal form. 16094/159661 useless extension candidates. Maximal degree in co-relation 734221. Up to 93229 conditions per place. [2023-08-30 15:26:28,954 INFO L137 encePairwiseOnDemand]: 246/254 looper letters, 310 selfloop transitions, 97 changer transitions 0/411 dead transitions. [2023-08-30 15:26:28,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 411 transitions, 2643 flow [2023-08-30 15:26:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:26:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:26:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1805 transitions. [2023-08-30 15:26:28,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921916010498688 [2023-08-30 15:26:28,958 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1805 transitions. [2023-08-30 15:26:28,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1805 transitions. [2023-08-30 15:26:28,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:28,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1805 transitions. [2023-08-30 15:26:28,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 150.41666666666666) internal successors, (1805), 12 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:28,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:28,967 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:28,967 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 413 flow. Second operand 12 states and 1805 transitions. [2023-08-30 15:26:28,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 411 transitions, 2643 flow [2023-08-30 15:26:29,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 411 transitions, 2619 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:26:29,478 INFO L231 Difference]: Finished difference. Result has 86 places, 141 transitions, 1440 flow [2023-08-30 15:26:29,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1440, PETRI_PLACES=86, PETRI_TRANSITIONS=141} [2023-08-30 15:26:29,479 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2023-08-30 15:26:29,480 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 141 transitions, 1440 flow [2023-08-30 15:26:29,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 121.3076923076923) internal successors, (1577), 13 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:29,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:29,481 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 15:26:29,489 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 15:26:29,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:29,686 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:29,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:29,687 INFO L85 PathProgramCache]: Analyzing trace with hash -456292553, now seen corresponding path program 2 times [2023-08-30 15:26:29,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:29,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361479555] [2023-08-30 15:26:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:29,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:29,897 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 15:26:29,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:29,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361479555] [2023-08-30 15:26:29,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361479555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:29,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929255262] [2023-08-30 15:26:29,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:26:29,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:29,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:29,900 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 15:26:29,903 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 15:26:29,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:26:29,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:29,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:26:29,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:26:29,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:26:29,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929255262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:26:29,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:26:29,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-30 15:26:29,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244532072] [2023-08-30 15:26:29,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:26:29,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:26:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:26:29,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:26:30,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 15:26:30,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 141 transitions, 1440 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:30,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:30,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 15:26:30,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:42,316 INFO L130 PetriNetUnfolder]: 128123/165014 cut-off events. [2023-08-30 15:26:42,317 INFO L131 PetriNetUnfolder]: For 322283/325469 co-relation queries the response was YES. [2023-08-30 15:26:42,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573749 conditions, 165014 events. 128123/165014 cut-off events. For 322283/325469 co-relation queries the response was YES. Maximal size of possible extension queue 8679. Compared 1085567 event pairs, 84713 based on Foata normal form. 5442/112572 useless extension candidates. Maximal degree in co-relation 573719. Up to 164882 conditions per place. [2023-08-30 15:26:43,674 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 116 selfloop transitions, 1 changer transitions 0/121 dead transitions. [2023-08-30 15:26:43,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 1476 flow [2023-08-30 15:26:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:26:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:26:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-30 15:26:43,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144356955380578 [2023-08-30 15:26:43,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-30 15:26:43,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-30 15:26:43,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:43,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-30 15:26:43,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:43,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:43,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:43,679 INFO L175 Difference]: Start difference. First operand has 86 places, 141 transitions, 1440 flow. Second operand 3 states and 392 transitions. [2023-08-30 15:26:43,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 1476 flow [2023-08-30 15:26:47,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 121 transitions, 1257 flow, removed 97 selfloop flow, removed 4 redundant places. [2023-08-30 15:26:47,295 INFO L231 Difference]: Finished difference. Result has 82 places, 121 transitions, 1025 flow [2023-08-30 15:26:47,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1025, PETRI_PLACES=82, PETRI_TRANSITIONS=121} [2023-08-30 15:26:47,295 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2023-08-30 15:26:47,296 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 121 transitions, 1025 flow [2023-08-30 15:26:47,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:47,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:47,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:26:47,305 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 15:26:47,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:47,507 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:26:47,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1486588999, now seen corresponding path program 1 times [2023-08-30 15:26:47,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:47,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772588489] [2023-08-30 15:26:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:47,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:47,569 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 15:26:47,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:47,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772588489] [2023-08-30 15:26:47,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772588489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:47,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724239354] [2023-08-30 15:26:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:47,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:47,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:47,572 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 15:26:47,577 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 15:26:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:47,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:26:47,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:47,661 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 15:26:47,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:47,683 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 15:26:47,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724239354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:26:47,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:26:47,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 15:26:47,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463761348] [2023-08-30 15:26:47,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:26:47,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:26:47,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:47,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:26:47,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:26:47,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 15:26:47,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 121 transitions, 1025 flow. Second operand has 7 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:47,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:47,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 15:26:47,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:27:20,653 INFO L130 PetriNetUnfolder]: 329587/424586 cut-off events. [2023-08-30 15:27:20,653 INFO L131 PetriNetUnfolder]: For 853622/860296 co-relation queries the response was YES. [2023-08-30 15:27:21,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378505 conditions, 424586 events. 329587/424586 cut-off events. For 853622/860296 co-relation queries the response was YES. Maximal size of possible extension queue 17220. Compared 2931151 event pairs, 34897 based on Foata normal form. 11398/299000 useless extension candidates. Maximal degree in co-relation 1378477. Up to 160473 conditions per place. [2023-08-30 15:27:23,676 INFO L137 encePairwiseOnDemand]: 245/254 looper letters, 624 selfloop transitions, 20 changer transitions 0/648 dead transitions. [2023-08-30 15:27:23,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 648 transitions, 7136 flow [2023-08-30 15:27:23,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:27:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:27:23,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1001 transitions. [2023-08-30 15:27:23,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562992125984252 [2023-08-30 15:27:23,679 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1001 transitions. [2023-08-30 15:27:23,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1001 transitions. [2023-08-30 15:27:23,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:27:23,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1001 transitions. [2023-08-30 15:27:23,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:23,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:23,684 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:23,684 INFO L175 Difference]: Start difference. First operand has 82 places, 121 transitions, 1025 flow. Second operand 7 states and 1001 transitions. [2023-08-30 15:27:23,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 648 transitions, 7136 flow [2023-08-30 15:27:26,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 648 transitions, 7135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:27:26,384 INFO L231 Difference]: Finished difference. Result has 92 places, 138 transitions, 1214 flow [2023-08-30 15:27:26,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1214, PETRI_PLACES=92, PETRI_TRANSITIONS=138} [2023-08-30 15:27:26,385 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 40 predicate places. [2023-08-30 15:27:26,385 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 138 transitions, 1214 flow [2023-08-30 15:27:26,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:26,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:27:26,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:27:26,392 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 15:27:26,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 15:27:26,590 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:27:26,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:27:26,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1160378848, now seen corresponding path program 1 times [2023-08-30 15:27:26,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:27:26,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758236364] [2023-08-30 15:27:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:27:26,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:27:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:27:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:26,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:27:26,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758236364] [2023-08-30 15:27:26,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758236364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:27:26,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373335828] [2023-08-30 15:27:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:27:26,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:27:26,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:27:26,652 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 15:27:26,656 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 15:27:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:27:26,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 15:27:26,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:27:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:27:26,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:27:26,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373335828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:27:26,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:27:26,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 15:27:26,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192720012] [2023-08-30 15:27:26,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:27:26,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:27:26,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:27:26,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:27:26,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:27:26,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 15:27:26,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 138 transitions, 1214 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:27:26,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:27:26,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 15:27:26,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:25,724 INFO L130 PetriNetUnfolder]: 504731/658378 cut-off events. [2023-08-30 15:28:25,725 INFO L131 PetriNetUnfolder]: For 1947442/1958162 co-relation queries the response was YES. [2023-08-30 15:28:29,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2823311 conditions, 658378 events. 504731/658378 cut-off events. For 1947442/1958162 co-relation queries the response was YES. Maximal size of possible extension queue 24181. Compared 4830000 event pairs, 81101 based on Foata normal form. 51040/539798 useless extension candidates. Maximal degree in co-relation 2823277. Up to 254100 conditions per place. [2023-08-30 15:28:33,218 INFO L137 encePairwiseOnDemand]: 245/254 looper letters, 322 selfloop transitions, 35 changer transitions 0/361 dead transitions. [2023-08-30 15:28:33,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 361 transitions, 4015 flow [2023-08-30 15:28:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:28:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:28:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 687 transitions. [2023-08-30 15:28:33,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409448818897638 [2023-08-30 15:28:33,237 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 687 transitions. [2023-08-30 15:28:33,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 687 transitions. [2023-08-30 15:28:33,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:33,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 687 transitions. [2023-08-30 15:28:33,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:33,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:33,253 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:33,253 INFO L175 Difference]: Start difference. First operand has 92 places, 138 transitions, 1214 flow. Second operand 5 states and 687 transitions. [2023-08-30 15:28:33,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 361 transitions, 4015 flow [2023-08-30 15:31:01,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 361 transitions, 3961 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-08-30 15:31:01,724 INFO L231 Difference]: Finished difference. Result has 94 places, 157 transitions, 1471 flow [2023-08-30 15:31:01,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1471, PETRI_PLACES=94, PETRI_TRANSITIONS=157} [2023-08-30 15:31:01,725 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2023-08-30 15:31:01,725 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 157 transitions, 1471 flow [2023-08-30 15:31:01,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:01,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:31:01,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:31:01,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 15:31:01,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:31:01,929 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:31:01,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:31:01,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1486589035, now seen corresponding path program 1 times [2023-08-30 15:31:01,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:31:01,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701069457] [2023-08-30 15:31:01,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:31:01,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:31:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:31:01,961 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 15:31:01,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:31:01,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701069457] [2023-08-30 15:31:01,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701069457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:31:01,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:31:01,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:31:01,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437508414] [2023-08-30 15:31:01,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:31:01,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:31:01,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:31:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:31:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:31:01,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 15:31:01,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 157 transitions, 1471 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:01,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:31:01,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 15:31:01,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:31:48,522 INFO L130 PetriNetUnfolder]: 369119/482610 cut-off events. [2023-08-30 15:31:48,522 INFO L131 PetriNetUnfolder]: For 1484404/1492260 co-relation queries the response was YES. [2023-08-30 15:31:50,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2135469 conditions, 482610 events. 369119/482610 cut-off events. For 1484404/1492260 co-relation queries the response was YES. Maximal size of possible extension queue 17114. Compared 3386391 event pairs, 37757 based on Foata normal form. 7856/399322 useless extension candidates. Maximal degree in co-relation 2135433. Up to 474336 conditions per place. [2023-08-30 15:31:52,796 INFO L137 encePairwiseOnDemand]: 252/254 looper letters, 242 selfloop transitions, 1 changer transitions 0/246 dead transitions. [2023-08-30 15:31:52,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 246 transitions, 2807 flow [2023-08-30 15:31:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:31:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:31:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-08-30 15:31:52,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328083989501312 [2023-08-30 15:31:52,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-08-30 15:31:52,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-08-30 15:31:52,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:31:52,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-08-30 15:31:52,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:52,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:52,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:31:52,801 INFO L175 Difference]: Start difference. First operand has 94 places, 157 transitions, 1471 flow. Second operand 3 states and 406 transitions. [2023-08-30 15:31:52,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 246 transitions, 2807 flow [2023-08-30 15:32:45,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 246 transitions, 2728 flow, removed 39 selfloop flow, removed 1 redundant places. [2023-08-30 15:32:45,898 INFO L231 Difference]: Finished difference. Result has 94 places, 147 transitions, 1301 flow [2023-08-30 15:32:45,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1301, PETRI_PLACES=94, PETRI_TRANSITIONS=147} [2023-08-30 15:32:45,899 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2023-08-30 15:32:45,899 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 147 transitions, 1301 flow [2023-08-30 15:32:45,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:45,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:32:45,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:32:45,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 15:32:45,899 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:32:45,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:32:45,900 INFO L85 PathProgramCache]: Analyzing trace with hash -620992751, now seen corresponding path program 1 times [2023-08-30 15:32:45,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:32:45,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934883680] [2023-08-30 15:32:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:32:45,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:32:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:32:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:32:45,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:32:45,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934883680] [2023-08-30 15:32:45,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934883680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:32:45,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749832359] [2023-08-30 15:32:45,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:32:45,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:32:45,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:32:45,953 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 15:32:45,957 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 15:32:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:32:46,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:32:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:32:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:32:46,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:32:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:32:46,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749832359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:32:46,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:32:46,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 15:32:46,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954399307] [2023-08-30 15:32:46,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:32:46,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:32:46,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:32:46,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:32:46,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:32:46,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 15:32:46,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 147 transitions, 1301 flow. Second operand has 7 states, 7 states have (on average 121.28571428571429) internal successors, (849), 7 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:32:46,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:32:46,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 15:32:46,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:34:05,658 INFO L130 PetriNetUnfolder]: 619493/800803 cut-off events. [2023-08-30 15:34:05,658 INFO L131 PetriNetUnfolder]: For 2110136/2111096 co-relation queries the response was YES. [2023-08-30 15:34:09,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3169900 conditions, 800803 events. 619493/800803 cut-off events. For 2110136/2111096 co-relation queries the response was YES. Maximal size of possible extension queue 22204. Compared 5655449 event pairs, 107704 based on Foata normal form. 776/652895 useless extension candidates. Maximal degree in co-relation 3169864. Up to 239991 conditions per place. [2023-08-30 15:34:12,701 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 447 selfloop transitions, 107 changer transitions 0/557 dead transitions. [2023-08-30 15:34:12,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 557 transitions, 5798 flow [2023-08-30 15:34:12,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:34:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:34:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 989 transitions. [2023-08-30 15:34:12,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562429696287964 [2023-08-30 15:34:12,703 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 989 transitions. [2023-08-30 15:34:12,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 989 transitions. [2023-08-30 15:34:12,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:34:12,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 989 transitions. [2023-08-30 15:34:12,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 141.28571428571428) internal successors, (989), 7 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:34:12,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:34:12,708 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:34:12,708 INFO L175 Difference]: Start difference. First operand has 94 places, 147 transitions, 1301 flow. Second operand 7 states and 989 transitions. [2023-08-30 15:34:12,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 557 transitions, 5798 flow [2023-08-30 15:36:13,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 557 transitions, 5797 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:36:13,431 INFO L231 Difference]: Finished difference. Result has 102 places, 229 transitions, 2547 flow [2023-08-30 15:36:13,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2547, PETRI_PLACES=102, PETRI_TRANSITIONS=229} [2023-08-30 15:36:13,432 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2023-08-30 15:36:13,433 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 229 transitions, 2547 flow [2023-08-30 15:36:13,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 121.28571428571429) internal successors, (849), 7 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:36:13,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:36:13,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:36:13,439 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 15:36:13,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:36:13,634 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 15:36:13,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:36:13,634 INFO L85 PathProgramCache]: Analyzing trace with hash -616552930, now seen corresponding path program 1 times [2023-08-30 15:36:13,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:36:13,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897577693] [2023-08-30 15:36:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:36:13,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:36:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:36:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:36:13,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:36:13,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897577693] [2023-08-30 15:36:13,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897577693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:36:13,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299638008] [2023-08-30 15:36:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:36:13,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:36:13,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:36:13,672 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 15:36:13,679 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 15:36:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:36:13,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:36:13,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:36:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:36:13,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:36:13,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299638008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:36:13,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:36:13,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 15:36:13,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610857238] [2023-08-30 15:36:13,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:36:13,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:36:13,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:36:13,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:36:13,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:36:13,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 15:36:13,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 229 transitions, 2547 flow. Second operand has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:36:13,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:36:13,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 15:36:13,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15