./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-subst.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/chl-word-subst.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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --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 14:59:16,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 14:59:16,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 14:59:16,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 14:59:16,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 14:59:16,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 14:59:16,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 14:59:16,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 14:59:16,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 14:59:16,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 14:59:16,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 14:59:16,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 14:59:16,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 14:59:16,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 14:59:16,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 14:59:16,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 14:59:16,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 14:59:16,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 14:59:16,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 14:59:16,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 14:59:16,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 14:59:16,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 14:59:16,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 14:59:16,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 14:59:16,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 14:59:16,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 14:59:16,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 14:59:16,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 14:59:16,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 14:59:16,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 14:59:16,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 14:59:16,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 14:59:16,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 14:59:16,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 14:59:16,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 14:59:16,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 14:59:16,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 14:59:16,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 14:59:16,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 14:59:16,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 14:59:16,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 14:59:16,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 14:59:16,702 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 14:59:16,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 14:59:16,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 14:59:16,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 14:59:16,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 14:59:16,705 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 14:59:16,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 14:59:16,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 14:59:16,706 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 14:59:16,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 14:59:16,706 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 14:59:16,707 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 14:59:16,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 14:59:16,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 14:59:16,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 14:59:16,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 14:59:16,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 14:59:16,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 14:59:16,708 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 14:59:16,708 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 14:59:16,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 14:59:16,708 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 14:59:16,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 14:59:16,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 14:59:16,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 14:59:16,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 14:59:16,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 14:59:16,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 14:59:16,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 14:59:16,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 14:59:16,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 14:59:16,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 14:59:16,711 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 14:59:16,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 14:59:16,711 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 14:59:16,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 14:59:16,711 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 14:59:16,711 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 14:59:16,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 14:59:17,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 14:59:17,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 14:59:17,019 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 14:59:17,020 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 14:59:17,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-08-30 14:59:18,238 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 14:59:18,479 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 14:59:18,479 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-08-30 14:59:18,487 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66634bcc5/edc6f61292c345acb962538d98da4652/FLAG04dbc8a2e [2023-08-30 14:59:18,501 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66634bcc5/edc6f61292c345acb962538d98da4652 [2023-08-30 14:59:18,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 14:59:18,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 14:59:18,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 14:59:18,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 14:59:18,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 14:59:18,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df9902c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18, skipping insertion in model container [2023-08-30 14:59:18,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 14:59:18,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 14:59:18,740 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/chl-word-subst.wvr.c[3345,3358] [2023-08-30 14:59:18,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 14:59:18,762 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 14:59:18,799 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/chl-word-subst.wvr.c[3345,3358] [2023-08-30 14:59:18,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 14:59:18,825 INFO L208 MainTranslator]: Completed translation [2023-08-30 14:59:18,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18 WrapperNode [2023-08-30 14:59:18,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 14:59:18,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 14:59:18,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 14:59:18,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 14:59:18,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,889 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 191 [2023-08-30 14:59:18,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 14:59:18,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 14:59:18,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 14:59:18,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 14:59:18,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,939 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 14:59:18,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 14:59:18,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 14:59:18,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 14:59:18,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18" (1/1) ... [2023-08-30 14:59:18,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 14:59:18,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 14:59:18,977 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 14:59:18,995 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 14:59:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 14:59:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 14:59:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 14:59:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 14:59:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 14:59:19,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 14:59:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 14:59:19,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 14:59:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 14:59:19,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 14:59:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 14:59:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 14:59:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 14:59:19,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 14:59:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 14:59:19,022 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 14:59:19,172 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 14:59:19,174 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 14:59:19,563 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 14:59:19,571 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 14:59:19,571 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 14:59:19,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:59:19 BoogieIcfgContainer [2023-08-30 14:59:19,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 14:59:19,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 14:59:19,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 14:59:19,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 14:59:19,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:59:18" (1/3) ... [2023-08-30 14:59:19,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3cfb00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:59:19, skipping insertion in model container [2023-08-30 14:59:19,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:59:18" (2/3) ... [2023-08-30 14:59:19,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3cfb00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:59:19, skipping insertion in model container [2023-08-30 14:59:19,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:59:19" (3/3) ... [2023-08-30 14:59:19,580 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2023-08-30 14:59:19,594 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 14:59:19,602 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 14:59:19,602 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 14:59:19,602 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 14:59:19,685 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 14:59:19,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 312 places, 331 transitions, 686 flow [2023-08-30 14:59:19,870 INFO L130 PetriNetUnfolder]: 29/328 cut-off events. [2023-08-30 14:59:19,870 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 14:59:19,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 328 events. 29/328 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 547 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 260. Up to 3 conditions per place. [2023-08-30 14:59:19,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 312 places, 331 transitions, 686 flow [2023-08-30 14:59:19,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 304 transitions, 623 flow [2023-08-30 14:59:19,901 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 14:59:19,908 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 304 transitions, 623 flow [2023-08-30 14:59:19,910 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 304 transitions, 623 flow [2023-08-30 14:59:19,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 304 transitions, 623 flow [2023-08-30 14:59:19,954 INFO L130 PetriNetUnfolder]: 27/304 cut-off events. [2023-08-30 14:59:19,954 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 14:59:19,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 304 events. 27/304 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 541 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 260. Up to 3 conditions per place. [2023-08-30 14:59:19,961 INFO L119 LiptonReduction]: Number of co-enabled transitions 11400 [2023-08-30 14:59:28,663 INFO L134 LiptonReduction]: Checked pairs total: 16072 [2023-08-30 14:59:28,663 INFO L136 LiptonReduction]: Total number of compositions: 326 [2023-08-30 14:59:28,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 14:59:28,679 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;@3f6f2e68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 14:59:28,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2023-08-30 14:59:28,681 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 14:59:28,682 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 14:59:28,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:59:28,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 14:59:28,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 14:59:28,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:59:28,687 INFO L85 PathProgramCache]: Analyzing trace with hash 40201, now seen corresponding path program 1 times [2023-08-30 14:59:28,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:59:28,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920840417] [2023-08-30 14:59:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:59:28,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:59:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:59:29,005 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 14:59:29,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:59:29,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920840417] [2023-08-30 14:59:29,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920840417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:59:29,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 14:59:29,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 14:59:29,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334436111] [2023-08-30 14:59:29,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:59:29,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 14:59:29,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:59:29,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 14:59:29,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 14:59:29,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 657 [2023-08-30 14:59:29,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states 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 14:59:29,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:59:29,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 657 [2023-08-30 14:59:29,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:59:30,523 INFO L130 PetriNetUnfolder]: 12137/16403 cut-off events. [2023-08-30 14:59:30,524 INFO L131 PetriNetUnfolder]: For 668/668 co-relation queries the response was YES. [2023-08-30 14:59:30,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33511 conditions, 16403 events. 12137/16403 cut-off events. For 668/668 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 83082 event pairs, 8860 based on Foata normal form. 0/8047 useless extension candidates. Maximal degree in co-relation 15562. Up to 8206 conditions per place. [2023-08-30 14:59:30,645 INFO L137 encePairwiseOnDemand]: 645/657 looper letters, 101 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2023-08-30 14:59:30,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 107 transitions, 458 flow [2023-08-30 14:59:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 14:59:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 14:59:30,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2023-08-30 14:59:30,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154743784880771 [2023-08-30 14:59:30,668 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2023-08-30 14:59:30,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2023-08-30 14:59:30,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:59:30,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2023-08-30 14:59:30,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 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 14:59:30,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 14:59:30,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 14:59:30,691 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 129 flow. Second operand 3 states and 1016 transitions. [2023-08-30 14:59:30,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 107 transitions, 458 flow [2023-08-30 14:59:30,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 107 transitions, 440 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 14:59:30,713 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 176 flow [2023-08-30 14:59:30,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-08-30 14:59:30,718 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2023-08-30 14:59:30,719 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 176 flow [2023-08-30 14:59:30,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states 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 14:59:30,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:59:30,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 14:59:30,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 14:59:30,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 14:59:30,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:59:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1247914, now seen corresponding path program 1 times [2023-08-30 14:59:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:59:30,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851797848] [2023-08-30 14:59:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:59:30,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:59:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:59:30,815 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 14:59:30,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:59:30,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851797848] [2023-08-30 14:59:30,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851797848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 14:59:30,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635471904] [2023-08-30 14:59:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:59:30,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:59:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 14:59:30,819 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 14:59:30,861 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 14:59:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:59:30,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 14:59:30,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 14:59:30,998 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 14:59:30,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 14:59:31,013 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 14:59:31,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635471904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 14:59:31,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 14:59:31,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 14:59:31,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534185205] [2023-08-30 14:59:31,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 14:59:31,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 14:59:31,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:59:31,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 14:59:31,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 14:59:31,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 657 [2023-08-30 14:59:31,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 302.14285714285717) internal successors, (2115), 7 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states 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 14:59:31,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:59:31,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 657 [2023-08-30 14:59:31,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:59:34,184 INFO L130 PetriNetUnfolder]: 30350/41006 cut-off events. [2023-08-30 14:59:34,185 INFO L131 PetriNetUnfolder]: For 335/335 co-relation queries the response was YES. [2023-08-30 14:59:34,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83339 conditions, 41006 events. 30350/41006 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 1708. Compared 231205 event pairs, 22150 based on Foata normal form. 0/20131 useless extension candidates. Maximal degree in co-relation 66587. Up to 8204 conditions per place. [2023-08-30 14:59:34,516 INFO L137 encePairwiseOnDemand]: 645/657 looper letters, 233 selfloop transitions, 33 changer transitions 0/266 dead transitions. [2023-08-30 14:59:34,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 266 transitions, 1200 flow [2023-08-30 14:59:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 14:59:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 14:59:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2382 transitions. [2023-08-30 14:59:34,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5179386823222439 [2023-08-30 14:59:34,523 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2382 transitions. [2023-08-30 14:59:34,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2382 transitions. [2023-08-30 14:59:34,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:59:34,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2382 transitions. [2023-08-30 14:59:34,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 340.2857142857143) internal successors, (2382), 7 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 14:59:34,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 657.0) internal successors, (5256), 8 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states 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 14:59:34,538 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 657.0) internal successors, (5256), 8 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states 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 14:59:34,538 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 176 flow. Second operand 7 states and 2382 transitions. [2023-08-30 14:59:34,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 266 transitions, 1200 flow [2023-08-30 14:59:34,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 266 transitions, 1176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 14:59:34,544 INFO L231 Difference]: Finished difference. Result has 62 places, 86 transitions, 383 flow [2023-08-30 14:59:34,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=62, PETRI_TRANSITIONS=86} [2023-08-30 14:59:34,545 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-08-30 14:59:34,545 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 86 transitions, 383 flow [2023-08-30 14:59:34,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 302.14285714285717) internal successors, (2115), 7 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states 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 14:59:34,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:59:34,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-30 14:59:34,560 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 14:59:34,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:59:34,756 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 14:59:34,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:59:34,757 INFO L85 PathProgramCache]: Analyzing trace with hash 38686537, now seen corresponding path program 1 times [2023-08-30 14:59:34,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:59:34,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534399156] [2023-08-30 14:59:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:59:34,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:59:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:59:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 14:59:34,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:59:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534399156] [2023-08-30 14:59:34,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534399156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:59:34,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 14:59:34,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 14:59:34,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968672034] [2023-08-30 14:59:34,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:59:34,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 14:59:34,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:59:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 14:59:34,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 14:59:34,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 657 [2023-08-30 14:59:34,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 86 transitions, 383 flow. Second operand has 3 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 0 states have call successors, (0), 0 states 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 14:59:34,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:59:34,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 657 [2023-08-30 14:59:34,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:59:37,330 INFO L130 PetriNetUnfolder]: 30341/40994 cut-off events. [2023-08-30 14:59:37,331 INFO L131 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2023-08-30 14:59:37,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83342 conditions, 40994 events. 30341/40994 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 1847. Compared 232998 event pairs, 22150 based on Foata normal form. 2/20132 useless extension candidates. Maximal degree in co-relation 49977. Up to 40994 conditions per place. [2023-08-30 14:59:37,595 INFO L137 encePairwiseOnDemand]: 653/657 looper letters, 73 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-30 14:59:37,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 450 flow [2023-08-30 14:59:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 14:59:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 14:59:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 960 transitions. [2023-08-30 14:59:37,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487062404870624 [2023-08-30 14:59:37,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 960 transitions. [2023-08-30 14:59:37,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 960 transitions. [2023-08-30 14:59:37,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:59:37,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 960 transitions. [2023-08-30 14:59:37,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.0) internal successors, (960), 3 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 14:59:37,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 14:59:37,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 14:59:37,607 INFO L175 Difference]: Start difference. First operand has 62 places, 86 transitions, 383 flow. Second operand 3 states and 960 transitions. [2023-08-30 14:59:37,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 450 flow [2023-08-30 14:59:37,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 420 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 14:59:37,611 INFO L231 Difference]: Finished difference. Result has 59 places, 74 transitions, 274 flow [2023-08-30 14:59:37,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=59, PETRI_TRANSITIONS=74} [2023-08-30 14:59:37,612 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-30 14:59:37,613 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 74 transitions, 274 flow [2023-08-30 14:59:37,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 0 states have call successors, (0), 0 states 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 14:59:37,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:59:37,614 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 14:59:37,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 14:59:37,614 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 14:59:37,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:59:37,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1476890216, now seen corresponding path program 2 times [2023-08-30 14:59:37,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:59:37,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083069781] [2023-08-30 14:59:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:59:37,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:59:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:59:37,760 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 14:59:37,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:59:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083069781] [2023-08-30 14:59:37,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083069781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 14:59:37,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521670166] [2023-08-30 14:59:37,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 14:59:37,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:59:37,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 14:59:37,764 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 14:59:37,768 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 14:59:37,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 14:59:37,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 14:59:37,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 14:59:37,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 14:59:37,863 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 14:59:37,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 14:59:37,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521670166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:59:37,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 14:59:37,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 14:59:37,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186780059] [2023-08-30 14:59:37,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:59:37,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 14:59:37,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:59:37,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 14:59:37,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 14:59:37,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 657 [2023-08-30 14:59:37,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 74 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states 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 14:59:37,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:59:37,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 657 [2023-08-30 14:59:37,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:59:40,191 INFO L130 PetriNetUnfolder]: 30341/40993 cut-off events. [2023-08-30 14:59:40,191 INFO L131 PetriNetUnfolder]: For 344/344 co-relation queries the response was YES. [2023-08-30 14:59:40,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83320 conditions, 40993 events. 30341/40993 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 1847. Compared 232971 event pairs, 22150 based on Foata normal form. 1/20132 useless extension candidates. Maximal degree in co-relation 83308. Up to 40988 conditions per place. [2023-08-30 14:59:40,369 INFO L137 encePairwiseOnDemand]: 654/657 looper letters, 67 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2023-08-30 14:59:40,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 410 flow [2023-08-30 14:59:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 14:59:40,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 14:59:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 966 transitions. [2023-08-30 14:59:40,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4901065449010654 [2023-08-30 14:59:40,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 966 transitions. [2023-08-30 14:59:40,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 966 transitions. [2023-08-30 14:59:40,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:59:40,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 966 transitions. [2023-08-30 14:59:40,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 14:59:40,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 14:59:40,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 14:59:40,385 INFO L175 Difference]: Start difference. First operand has 59 places, 74 transitions, 274 flow. Second operand 3 states and 966 transitions. [2023-08-30 14:59:40,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 410 flow [2023-08-30 14:59:40,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 14:59:40,389 INFO L231 Difference]: Finished difference. Result has 59 places, 73 transitions, 275 flow [2023-08-30 14:59:40,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=59, PETRI_TRANSITIONS=73} [2023-08-30 14:59:40,390 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-30 14:59:40,390 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 73 transitions, 275 flow [2023-08-30 14:59:40,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states 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 14:59:40,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:59:40,391 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 14:59:40,400 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 14:59:40,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 14:59:40,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 14:59:40,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:59:40,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1845262550, now seen corresponding path program 1 times [2023-08-30 14:59:40,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:59:40,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770050082] [2023-08-30 14:59:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:59:40,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:59:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:59:40,706 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 14:59:40,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:59:40,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770050082] [2023-08-30 14:59:40,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770050082] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 14:59:40,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252036061] [2023-08-30 14:59:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:59:40,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:59:40,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 14:59:40,709 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 14:59:40,734 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 14:59:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:59:40,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 14:59:40,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 14:59:40,825 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 14:59:40,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 14:59:40,872 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 14:59:40,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252036061] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 14:59:40,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 14:59:40,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 14:59:40,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796494077] [2023-08-30 14:59:40,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 14:59:40,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 14:59:40,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:59:40,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 14:59:40,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 14:59:41,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 657 [2023-08-30 14:59:41,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 73 transitions, 275 flow. Second operand has 13 states, 13 states have (on average 302.15384615384613) internal successors, (3928), 13 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states 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 14:59:41,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:59:41,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 657 [2023-08-30 14:59:41,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:59:46,321 INFO L130 PetriNetUnfolder]: 66749/90181 cut-off events. [2023-08-30 14:59:46,321 INFO L131 PetriNetUnfolder]: For 782/782 co-relation queries the response was YES. [2023-08-30 14:59:46,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183280 conditions, 90181 events. 66749/90181 cut-off events. For 782/782 co-relation queries the response was YES. Maximal size of possible extension queue 2486. Compared 533876 event pairs, 48730 based on Foata normal form. 12/44294 useless extension candidates. Maximal degree in co-relation 183267. Up to 9317 conditions per place. [2023-08-30 14:59:46,684 INFO L137 encePairwiseOnDemand]: 649/657 looper letters, 502 selfloop transitions, 51 changer transitions 0/553 dead transitions. [2023-08-30 14:59:46,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 553 transitions, 2521 flow [2023-08-30 14:59:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 14:59:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 14:59:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4177 transitions. [2023-08-30 14:59:46,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5298072044647387 [2023-08-30 14:59:46,695 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4177 transitions. [2023-08-30 14:59:46,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4177 transitions. [2023-08-30 14:59:46,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:59:46,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4177 transitions. [2023-08-30 14:59:46,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 348.0833333333333) internal successors, (4177), 12 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states 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 14:59:46,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 657.0) internal successors, (8541), 13 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states 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 14:59:46,724 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 657.0) internal successors, (8541), 13 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states 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 14:59:46,724 INFO L175 Difference]: Start difference. First operand has 59 places, 73 transitions, 275 flow. Second operand 12 states and 4177 transitions. [2023-08-30 14:59:46,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 553 transitions, 2521 flow [2023-08-30 14:59:46,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 553 transitions, 2497 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 14:59:46,732 INFO L231 Difference]: Finished difference. Result has 74 places, 103 transitions, 611 flow [2023-08-30 14:59:46,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=611, PETRI_PLACES=74, PETRI_TRANSITIONS=103} [2023-08-30 14:59:46,733 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2023-08-30 14:59:46,733 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 103 transitions, 611 flow [2023-08-30 14:59:46,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 302.15384615384613) internal successors, (3928), 13 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states 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 14:59:46,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:59:46,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 14:59:46,743 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 14:59:46,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 14:59:46,941 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 14:59:46,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:59:46,941 INFO L85 PathProgramCache]: Analyzing trace with hash -834736654, now seen corresponding path program 1 times [2023-08-30 14:59:46,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:59:46,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159904192] [2023-08-30 14:59:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:59:46,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:59:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:59:46,994 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 14:59:46,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:59:46,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159904192] [2023-08-30 14:59:46,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159904192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:59:46,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 14:59:46,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 14:59:46,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980223676] [2023-08-30 14:59:46,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:59:46,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 14:59:46,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:59:46,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 14:59:46,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 14:59:47,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 657 [2023-08-30 14:59:47,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 103 transitions, 611 flow. Second operand has 3 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 0 states have call successors, (0), 0 states 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 14:59:47,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:59:47,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 657 [2023-08-30 14:59:47,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 14:59:55,989 INFO L130 PetriNetUnfolder]: 115501/156445 cut-off events. [2023-08-30 14:59:55,989 INFO L131 PetriNetUnfolder]: For 798/798 co-relation queries the response was YES. [2023-08-30 14:59:56,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317922 conditions, 156445 events. 115501/156445 cut-off events. For 798/798 co-relation queries the response was YES. Maximal size of possible extension queue 4270. Compared 1037679 event pairs, 48730 based on Foata normal form. 0/78583 useless extension candidates. Maximal degree in co-relation 317903. Up to 90182 conditions per place. [2023-08-30 14:59:56,676 INFO L137 encePairwiseOnDemand]: 653/657 looper letters, 140 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2023-08-30 14:59:56,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 142 transitions, 978 flow [2023-08-30 14:59:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 14:59:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 14:59:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1018 transitions. [2023-08-30 14:59:56,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164890918315576 [2023-08-30 14:59:56,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1018 transitions. [2023-08-30 14:59:56,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1018 transitions. [2023-08-30 14:59:56,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 14:59:56,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1018 transitions. [2023-08-30 14:59:56,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.3333333333333) internal successors, (1018), 3 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states 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 14:59:56,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 14:59:56,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 14:59:56,686 INFO L175 Difference]: Start difference. First operand has 74 places, 103 transitions, 611 flow. Second operand 3 states and 1018 transitions. [2023-08-30 14:59:56,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 142 transitions, 978 flow [2023-08-30 14:59:56,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 142 transitions, 834 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-08-30 14:59:56,690 INFO L231 Difference]: Finished difference. Result has 72 places, 104 transitions, 481 flow [2023-08-30 14:59:56,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=481, PETRI_PLACES=72, PETRI_TRANSITIONS=104} [2023-08-30 14:59:56,691 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 16 predicate places. [2023-08-30 14:59:56,691 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 104 transitions, 481 flow [2023-08-30 14:59:56,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 0 states have call successors, (0), 0 states 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 14:59:56,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 14:59:56,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 14:59:56,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 14:59:56,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 14:59:56,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 14:59:56,693 INFO L85 PathProgramCache]: Analyzing trace with hash -834735184, now seen corresponding path program 1 times [2023-08-30 14:59:56,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 14:59:56,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340569962] [2023-08-30 14:59:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 14:59:56,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 14:59:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 14:59:56,783 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 14:59:56,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 14:59:56,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340569962] [2023-08-30 14:59:56,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340569962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 14:59:56,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 14:59:56,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 14:59:56,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541924579] [2023-08-30 14:59:56,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 14:59:56,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 14:59:56,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 14:59:56,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 14:59:56,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 14:59:56,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 657 [2023-08-30 14:59:56,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 104 transitions, 481 flow. Second operand has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states 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 14:59:56,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 14:59:56,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 657 [2023-08-30 14:59:56,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:00:13,977 INFO L130 PetriNetUnfolder]: 213566/287611 cut-off events. [2023-08-30 15:00:13,977 INFO L131 PetriNetUnfolder]: For 22386/22386 co-relation queries the response was YES. [2023-08-30 15:00:14,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607569 conditions, 287611 events. 213566/287611 cut-off events. For 22386/22386 co-relation queries the response was YES. Maximal size of possible extension queue 7121. Compared 1942832 event pairs, 155584 based on Foata normal form. 0/158292 useless extension candidates. Maximal degree in co-relation 607550. Up to 145753 conditions per place. [2023-08-30 15:00:15,386 INFO L137 encePairwiseOnDemand]: 652/657 looper letters, 180 selfloop transitions, 4 changer transitions 0/184 dead transitions. [2023-08-30 15:00:15,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 184 transitions, 1194 flow [2023-08-30 15:00:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:00:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:00:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1285 transitions. [2023-08-30 15:00:15,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889649923896499 [2023-08-30 15:00:15,389 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1285 transitions. [2023-08-30 15:00:15,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1285 transitions. [2023-08-30 15:00:15,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:00:15,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1285 transitions. [2023-08-30 15:00:15,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 321.25) internal successors, (1285), 4 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states 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 15:00:15,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 657.0) internal successors, (3285), 5 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states 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 15:00:15,396 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 657.0) internal successors, (3285), 5 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states 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 15:00:15,396 INFO L175 Difference]: Start difference. First operand has 72 places, 104 transitions, 481 flow. Second operand 4 states and 1285 transitions. [2023-08-30 15:00:15,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 184 transitions, 1194 flow [2023-08-30 15:00:15,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 184 transitions, 1190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:00:15,443 INFO L231 Difference]: Finished difference. Result has 76 places, 105 transitions, 498 flow [2023-08-30 15:00:15,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=498, PETRI_PLACES=76, PETRI_TRANSITIONS=105} [2023-08-30 15:00:15,444 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2023-08-30 15:00:15,444 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 105 transitions, 498 flow [2023-08-30 15:00:15,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states 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 15:00:15,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:00:15,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:00:15,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 15:00:15,445 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:00:15,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:00:15,446 INFO L85 PathProgramCache]: Analyzing trace with hash 727280455, now seen corresponding path program 1 times [2023-08-30 15:00:15,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:00:15,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288678023] [2023-08-30 15:00:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:00:15,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:00:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:00:15,590 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 15:00:15,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:00:15,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288678023] [2023-08-30 15:00:15,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288678023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:00:15,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616503777] [2023-08-30 15:00:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:00:15,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:00:15,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:00:15,594 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 15:00:15,626 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 15:00:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:00:15,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 15:00:15,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:00:15,767 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 15:00:15,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:00:15,806 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 15:00:15,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616503777] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:00:15,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:00:15,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 2] total 8 [2023-08-30 15:00:15,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692647041] [2023-08-30 15:00:15,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:00:15,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:00:15,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:00:15,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:00:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 15:00:15,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 657 [2023-08-30 15:00:15,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 105 transitions, 498 flow. Second operand has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states 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 15:00:15,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:00:15,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 657 [2023-08-30 15:00:15,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:00:31,810 INFO L130 PetriNetUnfolder]: 198980/269109 cut-off events. [2023-08-30 15:00:31,810 INFO L131 PetriNetUnfolder]: For 33672/33672 co-relation queries the response was YES. [2023-08-30 15:00:32,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570064 conditions, 269109 events. 198980/269109 cut-off events. For 33672/33672 co-relation queries the response was YES. Maximal size of possible extension queue 6703. Compared 1822220 event pairs, 146938 based on Foata normal form. 7832/164738 useless extension candidates. Maximal degree in co-relation 570042. Up to 269109 conditions per place. [2023-08-30 15:00:33,395 INFO L137 encePairwiseOnDemand]: 655/657 looper letters, 102 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-08-30 15:00:33,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 103 transitions, 694 flow [2023-08-30 15:00:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:00:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:00:33,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2023-08-30 15:00:33,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606798579401319 [2023-08-30 15:00:33,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2023-08-30 15:00:33,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2023-08-30 15:00:33,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:00:33,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2023-08-30 15:00:33,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 15:00:33,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 15:00:33,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 15:00:33,403 INFO L175 Difference]: Start difference. First operand has 76 places, 105 transitions, 498 flow. Second operand 3 states and 908 transitions. [2023-08-30 15:00:33,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 103 transitions, 694 flow [2023-08-30 15:00:33,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 103 transitions, 686 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 15:00:33,431 INFO L231 Difference]: Finished difference. Result has 75 places, 103 transitions, 482 flow [2023-08-30 15:00:33,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=75, PETRI_TRANSITIONS=103} [2023-08-30 15:00:33,431 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2023-08-30 15:00:33,432 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 103 transitions, 482 flow [2023-08-30 15:00:33,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states 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 15:00:33,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:00:33,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:00:33,440 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 15:00:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:00:33,638 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:00:33,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:00:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash 727280578, now seen corresponding path program 1 times [2023-08-30 15:00:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:00:33,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439433540] [2023-08-30 15:00:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:00:33,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:00:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:00:33,723 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 15:00:33,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:00:33,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439433540] [2023-08-30 15:00:33,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439433540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:00:33,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368970734] [2023-08-30 15:00:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:00:33,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:00:33,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:00:33,725 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 15:00:33,728 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 15:00:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:00:33,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 15:00:33,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:00:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:00:33,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:00:33,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368970734] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:00:33,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:00:33,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-30 15:00:33,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074660326] [2023-08-30 15:00:33,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:00:33,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:00:33,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:00:33,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:00:33,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:00:33,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 657 [2023-08-30 15:00:33,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 103 transitions, 482 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states 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 15:00:33,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:00:33,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 657 [2023-08-30 15:00:33,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:00:48,838 INFO L130 PetriNetUnfolder]: 188310/254523 cut-off events. [2023-08-30 15:00:48,839 INFO L131 PetriNetUnfolder]: For 18373/18373 co-relation queries the response was YES. [2023-08-30 15:00:49,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536467 conditions, 254523 events. 188310/254523 cut-off events. For 18373/18373 co-relation queries the response was YES. Maximal size of possible extension queue 6330. Compared 1711744 event pairs, 138292 based on Foata normal form. 3916/151604 useless extension candidates. Maximal degree in co-relation 536445. Up to 254511 conditions per place. [2023-08-30 15:00:50,105 INFO L137 encePairwiseOnDemand]: 654/657 looper letters, 90 selfloop transitions, 12 changer transitions 0/102 dead transitions. [2023-08-30 15:00:50,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 682 flow [2023-08-30 15:00:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:00:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:00:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1272 transitions. [2023-08-30 15:00:50,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4840182648401826 [2023-08-30 15:00:50,108 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1272 transitions. [2023-08-30 15:00:50,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1272 transitions. [2023-08-30 15:00:50,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:00:50,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1272 transitions. [2023-08-30 15:00:50,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 15:00:50,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 657.0) internal successors, (3285), 5 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states 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 15:00:50,115 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 657.0) internal successors, (3285), 5 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states 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 15:00:50,115 INFO L175 Difference]: Start difference. First operand has 75 places, 103 transitions, 482 flow. Second operand 4 states and 1272 transitions. [2023-08-30 15:00:50,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 682 flow [2023-08-30 15:00:50,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 680 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:00:50,138 INFO L231 Difference]: Finished difference. Result has 75 places, 102 transitions, 500 flow [2023-08-30 15:00:50,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=500, PETRI_PLACES=75, PETRI_TRANSITIONS=102} [2023-08-30 15:00:50,139 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2023-08-30 15:00:50,139 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 102 transitions, 500 flow [2023-08-30 15:00:50,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states 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 15:00:50,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:00:50,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:00:50,145 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 15:00:50,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:00:50,344 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:00:50,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:00:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1016688971, now seen corresponding path program 1 times [2023-08-30 15:00:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:00:50,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876422454] [2023-08-30 15:00:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:00:50,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:00:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:00:50,454 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 15:00:50,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:00:50,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876422454] [2023-08-30 15:00:50,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876422454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:00:50,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:00:50,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 15:00:50,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009701483] [2023-08-30 15:00:50,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:00:50,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 15:00:50,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:00:50,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 15:00:50,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:00:50,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 657 [2023-08-30 15:00:50,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 102 transitions, 500 flow. Second operand has 6 states, 6 states have (on average 293.6666666666667) internal successors, (1762), 6 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states 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 15:00:50,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:00:50,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 657 [2023-08-30 15:00:50,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:01:06,670 INFO L130 PetriNetUnfolder]: 186864/252541 cut-off events. [2023-08-30 15:01:06,670 INFO L131 PetriNetUnfolder]: For 14508/14508 co-relation queries the response was YES. [2023-08-30 15:01:07,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532294 conditions, 252541 events. 186864/252541 cut-off events. For 14508/14508 co-relation queries the response was YES. Maximal size of possible extension queue 6304. Compared 1706331 event pairs, 125290 based on Foata normal form. 0/146779 useless extension candidates. Maximal degree in co-relation 532272. Up to 211539 conditions per place. [2023-08-30 15:01:08,167 INFO L137 encePairwiseOnDemand]: 650/657 looper letters, 144 selfloop transitions, 26 changer transitions 0/170 dead transitions. [2023-08-30 15:01:08,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 170 transitions, 1005 flow [2023-08-30 15:01:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:01:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:01:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2163 transitions. [2023-08-30 15:01:08,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4703196347031963 [2023-08-30 15:01:08,171 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2163 transitions. [2023-08-30 15:01:08,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2163 transitions. [2023-08-30 15:01:08,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:01:08,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2163 transitions. [2023-08-30 15:01:08,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 309.0) internal successors, (2163), 7 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states 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 15:01:08,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 657.0) internal successors, (5256), 8 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states 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 15:01:08,181 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 657.0) internal successors, (5256), 8 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states 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 15:01:08,181 INFO L175 Difference]: Start difference. First operand has 75 places, 102 transitions, 500 flow. Second operand 7 states and 2163 transitions. [2023-08-30 15:01:08,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 170 transitions, 1005 flow [2023-08-30 15:01:08,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 170 transitions, 992 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:01:08,207 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 587 flow [2023-08-30 15:01:08,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=587, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2023-08-30 15:01:08,208 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2023-08-30 15:01:08,208 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 587 flow [2023-08-30 15:01:08,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 293.6666666666667) internal successors, (1762), 6 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states 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 15:01:08,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:01:08,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:01:08,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 15:01:08,210 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:01:08,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:01:08,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1016689078, now seen corresponding path program 1 times [2023-08-30 15:01:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:01:08,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222265388] [2023-08-30 15:01:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:01:08,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:01:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:01:08,302 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 15:01:08,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:01:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222265388] [2023-08-30 15:01:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222265388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:01:08,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:01:08,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:01:08,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220967353] [2023-08-30 15:01:08,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:01:08,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:01:08,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:01:08,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:01:08,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:01:08,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 657 [2023-08-30 15:01:08,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 587 flow. Second operand has 5 states, 5 states have (on average 294.0) internal successors, (1470), 5 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states 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 15:01:08,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:01:08,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 657 [2023-08-30 15:01:08,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:01:23,262 INFO L130 PetriNetUnfolder]: 178911/241640 cut-off events. [2023-08-30 15:01:23,262 INFO L131 PetriNetUnfolder]: For 24277/24277 co-relation queries the response was YES. [2023-08-30 15:01:23,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520356 conditions, 241640 events. 178911/241640 cut-off events. For 24277/24277 co-relation queries the response was YES. Maximal size of possible extension queue 5893. Compared 1610101 event pairs, 124699 based on Foata normal form. 2948/153032 useless extension candidates. Maximal degree in co-relation 520331. Up to 116371 conditions per place. [2023-08-30 15:01:24,579 INFO L137 encePairwiseOnDemand]: 651/657 looper letters, 193 selfloop transitions, 15 changer transitions 0/208 dead transitions. [2023-08-30 15:01:24,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 208 transitions, 1463 flow [2023-08-30 15:01:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:01:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:01:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1877 transitions. [2023-08-30 15:01:24,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47615423642820903 [2023-08-30 15:01:24,582 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1877 transitions. [2023-08-30 15:01:24,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1877 transitions. [2023-08-30 15:01:24,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:01:24,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1877 transitions. [2023-08-30 15:01:24,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 312.8333333333333) internal successors, (1877), 6 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states 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 15:01:24,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 657.0) internal successors, (4599), 7 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states 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 15:01:24,589 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 657.0) internal successors, (4599), 7 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states 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 15:01:24,589 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 587 flow. Second operand 6 states and 1877 transitions. [2023-08-30 15:01:24,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 208 transitions, 1463 flow [2023-08-30 15:01:24,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 208 transitions, 1446 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 15:01:24,647 INFO L231 Difference]: Finished difference. Result has 88 places, 116 transitions, 767 flow [2023-08-30 15:01:24,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=767, PETRI_PLACES=88, PETRI_TRANSITIONS=116} [2023-08-30 15:01:24,648 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2023-08-30 15:01:24,648 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 116 transitions, 767 flow [2023-08-30 15:01:24,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 294.0) internal successors, (1470), 5 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states 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 15:01:24,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:01:24,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:01:24,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 15:01:24,649 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:01:24,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:01:24,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1016689010, now seen corresponding path program 1 times [2023-08-30 15:01:24,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:01:24,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190532346] [2023-08-30 15:01:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:01:24,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:01:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:01:24,689 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 15:01:24,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:01:24,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190532346] [2023-08-30 15:01:24,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190532346] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:01:24,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:01:24,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:01:24,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470748546] [2023-08-30 15:01:24,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:01:24,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:01:24,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:01:24,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:01:24,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:01:24,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 657 [2023-08-30 15:01:24,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 767 flow. Second operand has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states 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 15:01:24,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:01:24,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 657 [2023-08-30 15:01:24,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:01:52,719 INFO L130 PetriNetUnfolder]: 303360/410389 cut-off events. [2023-08-30 15:01:52,720 INFO L131 PetriNetUnfolder]: For 50148/50148 co-relation queries the response was YES. [2023-08-30 15:01:53,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908784 conditions, 410389 events. 303360/410389 cut-off events. For 50148/50148 co-relation queries the response was YES. Maximal size of possible extension queue 9805. Compared 2960906 event pairs, 130609 based on Foata normal form. 0/262829 useless extension candidates. Maximal degree in co-relation 908756. Up to 241641 conditions per place. [2023-08-30 15:01:55,334 INFO L137 encePairwiseOnDemand]: 653/657 looper letters, 152 selfloop transitions, 2 changer transitions 0/154 dead transitions. [2023-08-30 15:01:55,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 154 transitions, 1183 flow [2023-08-30 15:01:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:01:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:01:55,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1012 transitions. [2023-08-30 15:01:55,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5134449518011162 [2023-08-30 15:01:55,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1012 transitions. [2023-08-30 15:01:55,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1012 transitions. [2023-08-30 15:01:55,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:01:55,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1012 transitions. [2023-08-30 15:01:55,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.3333333333333) internal successors, (1012), 3 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states 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 15:01:55,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 15:01:55,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 15:01:55,341 INFO L175 Difference]: Start difference. First operand has 88 places, 116 transitions, 767 flow. Second operand 3 states and 1012 transitions. [2023-08-30 15:01:55,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 154 transitions, 1183 flow [2023-08-30 15:01:55,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 154 transitions, 1180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:01:55,454 INFO L231 Difference]: Finished difference. Result has 90 places, 117 transitions, 778 flow [2023-08-30 15:01:55,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=778, PETRI_PLACES=90, PETRI_TRANSITIONS=117} [2023-08-30 15:01:55,454 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 34 predicate places. [2023-08-30 15:01:55,455 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 117 transitions, 778 flow [2023-08-30 15:01:55,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states 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 15:01:55,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:01:55,455 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:01:55,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 15:01:55,455 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:01:55,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:01:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash 977009876, now seen corresponding path program 1 times [2023-08-30 15:01:55,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:01:55,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181656828] [2023-08-30 15:01:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:01:55,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:01:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:01:55,545 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 15:01:55,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:01:55,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181656828] [2023-08-30 15:01:55,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181656828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:01:55,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:01:55,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 15:01:55,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672496533] [2023-08-30 15:01:55,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:01:55,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:01:55,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:01:55,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:01:55,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:01:55,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 657 [2023-08-30 15:01:55,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 117 transitions, 778 flow. Second operand has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states 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 15:01:55,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:01:55,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 657 [2023-08-30 15:01:55,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:02:18,449 INFO L130 PetriNetUnfolder]: 210082/287291 cut-off events. [2023-08-30 15:02:18,450 INFO L131 PetriNetUnfolder]: For 74258/74258 co-relation queries the response was YES. [2023-08-30 15:02:19,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665267 conditions, 287291 events. 210082/287291 cut-off events. For 74258/74258 co-relation queries the response was YES. Maximal size of possible extension queue 7162. Compared 2026125 event pairs, 135567 based on Foata normal form. 0/198587 useless extension candidates. Maximal degree in co-relation 665238. Up to 216106 conditions per place. [2023-08-30 15:02:20,251 INFO L137 encePairwiseOnDemand]: 652/657 looper letters, 203 selfloop transitions, 4 changer transitions 0/207 dead transitions. [2023-08-30 15:02:20,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 207 transitions, 1547 flow [2023-08-30 15:02:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:02:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:02:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1588 transitions. [2023-08-30 15:02:20,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834094368340944 [2023-08-30 15:02:20,255 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1588 transitions. [2023-08-30 15:02:20,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1588 transitions. [2023-08-30 15:02:20,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:02:20,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1588 transitions. [2023-08-30 15:02:20,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 15:02:20,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 657.0) internal successors, (3942), 6 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states 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 15:02:20,261 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 657.0) internal successors, (3942), 6 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states 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 15:02:20,261 INFO L175 Difference]: Start difference. First operand has 90 places, 117 transitions, 778 flow. Second operand 5 states and 1588 transitions. [2023-08-30 15:02:20,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 207 transitions, 1547 flow [2023-08-30 15:02:20,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 207 transitions, 1541 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:02:20,516 INFO L231 Difference]: Finished difference. Result has 95 places, 118 transitions, 795 flow [2023-08-30 15:02:20,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=795, PETRI_PLACES=95, PETRI_TRANSITIONS=118} [2023-08-30 15:02:20,517 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2023-08-30 15:02:20,517 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 118 transitions, 795 flow [2023-08-30 15:02:20,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states 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 15:02:20,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:02:20,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:02:20,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 15:02:20,517 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:02:20,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:02:20,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1124717240, now seen corresponding path program 1 times [2023-08-30 15:02:20,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:02:20,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635211105] [2023-08-30 15:02:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:02:20,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:02:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:02:20,626 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 15:02:20,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:02:20,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635211105] [2023-08-30 15:02:20,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635211105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:02:20,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265755545] [2023-08-30 15:02:20,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:02:20,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:02:20,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:02:20,632 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 15:02:20,633 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 15:02:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:02:20,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 15:02:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:02:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:02:20,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:02:20,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265755545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:02:20,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:02:20,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-08-30 15:02:20,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712664551] [2023-08-30 15:02:20,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:02:20,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:02:20,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:02:20,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:02:20,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:02:20,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 657 [2023-08-30 15:02:20,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 118 transitions, 795 flow. Second operand has 4 states, 4 states have (on average 307.75) internal successors, (1231), 4 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states 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 15:02:20,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:02:20,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 657 [2023-08-30 15:02:20,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:02:40,208 INFO L130 PetriNetUnfolder]: 194176/265489 cut-off events. [2023-08-30 15:02:40,209 INFO L131 PetriNetUnfolder]: For 92671/92671 co-relation queries the response was YES. [2023-08-30 15:02:41,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612870 conditions, 265489 events. 194176/265489 cut-off events. For 92671/92671 co-relation queries the response was YES. Maximal size of possible extension queue 6522. Compared 1834210 event pairs, 147558 based on Foata normal form. 5896/194541 useless extension candidates. Maximal degree in co-relation 612838. Up to 265442 conditions per place. [2023-08-30 15:02:41,871 INFO L137 encePairwiseOnDemand]: 654/657 looper letters, 93 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2023-08-30 15:02:41,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 116 transitions, 1014 flow [2023-08-30 15:02:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:02:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:02:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1271 transitions. [2023-08-30 15:02:41,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4836377473363775 [2023-08-30 15:02:41,874 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1271 transitions. [2023-08-30 15:02:41,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1271 transitions. [2023-08-30 15:02:41,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:02:41,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1271 transitions. [2023-08-30 15:02:41,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 317.75) internal successors, (1271), 4 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states 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 15:02:41,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 657.0) internal successors, (3285), 5 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states 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 15:02:41,879 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 657.0) internal successors, (3285), 5 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states 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 15:02:41,879 INFO L175 Difference]: Start difference. First operand has 95 places, 118 transitions, 795 flow. Second operand 4 states and 1271 transitions. [2023-08-30 15:02:41,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 116 transitions, 1014 flow [2023-08-30 15:02:42,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 116 transitions, 930 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 15:02:42,042 INFO L231 Difference]: Finished difference. Result has 91 places, 116 transitions, 744 flow [2023-08-30 15:02:42,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=744, PETRI_PLACES=91, PETRI_TRANSITIONS=116} [2023-08-30 15:02:42,043 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2023-08-30 15:02:42,043 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 116 transitions, 744 flow [2023-08-30 15:02:42,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.75) internal successors, (1231), 4 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states 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 15:02:42,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:02:42,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:02:42,050 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 15:02:42,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:02:42,250 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:02:42,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:02:42,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1453888922, now seen corresponding path program 1 times [2023-08-30 15:02:42,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:02:42,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346049700] [2023-08-30 15:02:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:02:42,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:02:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:02:42,333 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 15:02:42,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:02:42,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346049700] [2023-08-30 15:02:42,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346049700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:02:42,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:02:42,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 15:02:42,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726774943] [2023-08-30 15:02:42,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:02:42,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:02:42,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:02:42,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:02:42,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:02:42,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 657 [2023-08-30 15:02:42,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 116 transitions, 744 flow. Second operand has 5 states, 5 states have (on average 294.2) internal successors, (1471), 5 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states 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 15:02:42,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:02:42,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 657 [2023-08-30 15:02:42,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:03:00,704 INFO L130 PetriNetUnfolder]: 192216/262793 cut-off events. [2023-08-30 15:03:00,705 INFO L131 PetriNetUnfolder]: For 75370/75370 co-relation queries the response was YES. [2023-08-30 15:03:01,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606892 conditions, 262793 events. 192216/262793 cut-off events. For 75370/75370 co-relation queries the response was YES. Maximal size of possible extension queue 6575. Compared 1821864 event pairs, 127190 based on Foata normal form. 0/186936 useless extension candidates. Maximal degree in co-relation 606862. Up to 213459 conditions per place. [2023-08-30 15:03:02,487 INFO L137 encePairwiseOnDemand]: 651/657 looper letters, 154 selfloop transitions, 36 changer transitions 0/190 dead transitions. [2023-08-30 15:03:02,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 190 transitions, 1349 flow [2023-08-30 15:03:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:03:02,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:03:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1872 transitions. [2023-08-30 15:03:02,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748858447488584 [2023-08-30 15:03:02,490 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1872 transitions. [2023-08-30 15:03:02,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1872 transitions. [2023-08-30 15:03:02,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:03:02,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1872 transitions. [2023-08-30 15:03:02,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 312.0) internal successors, (1872), 6 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 15:03:02,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 657.0) internal successors, (4599), 7 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states 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 15:03:02,495 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 657.0) internal successors, (4599), 7 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states 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 15:03:02,496 INFO L175 Difference]: Start difference. First operand has 91 places, 116 transitions, 744 flow. Second operand 6 states and 1872 transitions. [2023-08-30 15:03:02,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 190 transitions, 1349 flow [2023-08-30 15:03:02,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 190 transitions, 1325 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:03:02,645 INFO L231 Difference]: Finished difference. Result has 96 places, 117 transitions, 834 flow [2023-08-30 15:03:02,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=834, PETRI_PLACES=96, PETRI_TRANSITIONS=117} [2023-08-30 15:03:02,645 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2023-08-30 15:03:02,645 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 117 transitions, 834 flow [2023-08-30 15:03:02,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 294.2) internal successors, (1471), 5 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states 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 15:03:02,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:03:02,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:03:02,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 15:03:02,646 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:03:02,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:03:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1453888881, now seen corresponding path program 1 times [2023-08-30 15:03:02,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:03:02,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339705307] [2023-08-30 15:03:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:03:02,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:03:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:03:02,685 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 15:03:02,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:03:02,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339705307] [2023-08-30 15:03:02,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339705307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:03:02,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:03:02,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:03:02,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254641722] [2023-08-30 15:03:02,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:03:02,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:03:02,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:03:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:03:02,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:03:02,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 657 [2023-08-30 15:03:02,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 117 transitions, 834 flow. Second operand has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:03:02,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:03:02,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 657 [2023-08-30 15:03:02,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:03:33,961 INFO L130 PetriNetUnfolder]: 286096/392161 cut-off events. [2023-08-30 15:03:33,962 INFO L131 PetriNetUnfolder]: For 123986/123986 co-relation queries the response was YES. [2023-08-30 15:03:35,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953750 conditions, 392161 events. 286096/392161 cut-off events. For 123986/123986 co-relation queries the response was YES. Maximal size of possible extension queue 10067. Compared 2880788 event pairs, 145910 based on Foata normal form. 0/313469 useless extension candidates. Maximal degree in co-relation 953719. Up to 262794 conditions per place. [2023-08-30 15:03:36,538 INFO L137 encePairwiseOnDemand]: 653/657 looper letters, 152 selfloop transitions, 2 changer transitions 0/154 dead transitions. [2023-08-30 15:03:36,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 154 transitions, 1264 flow [2023-08-30 15:03:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:03:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:03:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1008 transitions. [2023-08-30 15:03:36,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114155251141552 [2023-08-30 15:03:36,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1008 transitions. [2023-08-30 15:03:36,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1008 transitions. [2023-08-30 15:03:36,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:03:36,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1008 transitions. [2023-08-30 15:03:36,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.0) internal successors, (1008), 3 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 15:03:36,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 15:03:36,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 15:03:36,544 INFO L175 Difference]: Start difference. First operand has 96 places, 117 transitions, 834 flow. Second operand 3 states and 1008 transitions. [2023-08-30 15:03:36,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 154 transitions, 1264 flow [2023-08-30 15:03:36,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 154 transitions, 1229 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:03:36,867 INFO L231 Difference]: Finished difference. Result has 97 places, 118 transitions, 813 flow [2023-08-30 15:03:36,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=813, PETRI_PLACES=97, PETRI_TRANSITIONS=118} [2023-08-30 15:03:36,867 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2023-08-30 15:03:36,868 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 118 transitions, 813 flow [2023-08-30 15:03:36,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:03:36,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:03:36,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:03:36,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 15:03:36,868 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:03:36,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:03:36,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1164396443, now seen corresponding path program 1 times [2023-08-30 15:03:36,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:03:36,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493641445] [2023-08-30 15:03:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:03:36,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:03:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:03:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:03:36,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:03:36,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493641445] [2023-08-30 15:03:36,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493641445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:03:36,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:03:36,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 15:03:36,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694800467] [2023-08-30 15:03:36,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:03:36,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:03:36,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:03:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:03:36,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:03:37,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 657 [2023-08-30 15:03:37,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 118 transitions, 813 flow. Second operand has 5 states, 5 states have (on average 295.2) internal successors, (1476), 5 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states 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 15:03:37,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:03:37,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 657 [2023-08-30 15:03:37,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:04:25,336 INFO L130 PetriNetUnfolder]: 422610/585329 cut-off events. [2023-08-30 15:04:25,337 INFO L131 PetriNetUnfolder]: For 274407/274407 co-relation queries the response was YES. [2023-08-30 15:04:28,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506877 conditions, 585329 events. 422610/585329 cut-off events. For 274407/274407 co-relation queries the response was YES. Maximal size of possible extension queue 14391. Compared 4589665 event pairs, 268872 based on Foata normal form. 4032/519505 useless extension candidates. Maximal degree in co-relation 1506845. Up to 392149 conditions per place. [2023-08-30 15:04:31,408 INFO L137 encePairwiseOnDemand]: 650/657 looper letters, 243 selfloop transitions, 19 changer transitions 0/262 dead transitions. [2023-08-30 15:04:31,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 262 transitions, 1852 flow [2023-08-30 15:04:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:04:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:04:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2232 transitions. [2023-08-30 15:04:31,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48532289628180036 [2023-08-30 15:04:31,413 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2232 transitions. [2023-08-30 15:04:31,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2232 transitions. [2023-08-30 15:04:31,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:04:31,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2232 transitions. [2023-08-30 15:04:31,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 318.85714285714283) internal successors, (2232), 7 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:04:31,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 657.0) internal successors, (5256), 8 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states 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 15:04:31,422 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 657.0) internal successors, (5256), 8 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states 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 15:04:31,422 INFO L175 Difference]: Start difference. First operand has 97 places, 118 transitions, 813 flow. Second operand 7 states and 2232 transitions. [2023-08-30 15:04:31,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 262 transitions, 1852 flow [2023-08-30 15:04:49,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 262 transitions, 1842 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:04:49,137 INFO L231 Difference]: Finished difference. Result has 106 places, 123 transitions, 915 flow [2023-08-30 15:04:49,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=915, PETRI_PLACES=106, PETRI_TRANSITIONS=123} [2023-08-30 15:04:49,137 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2023-08-30 15:04:49,138 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 123 transitions, 915 flow [2023-08-30 15:04:49,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 295.2) internal successors, (1476), 5 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states 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 15:04:49,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:04:49,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:04:49,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 15:04:49,139 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:04:49,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:04:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1453888920, now seen corresponding path program 1 times [2023-08-30 15:04:49,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:04:49,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344390006] [2023-08-30 15:04:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:04:49,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:04:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:04:49,203 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 15:04:49,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:04:49,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344390006] [2023-08-30 15:04:49,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344390006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:04:49,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:04:49,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 15:04:49,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848970662] [2023-08-30 15:04:49,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:04:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:04:49,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:04:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:04:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:04:49,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 657 [2023-08-30 15:04:49,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 123 transitions, 915 flow. Second operand has 4 states, 4 states have (on average 297.75) internal successors, (1191), 4 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states 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 15:04:49,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:04:49,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 657 [2023-08-30 15:04:49,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:05:40,333 INFO L130 PetriNetUnfolder]: 397470/549477 cut-off events. [2023-08-30 15:05:40,333 INFO L131 PetriNetUnfolder]: For 435108/435108 co-relation queries the response was YES. [2023-08-30 15:05:42,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1466458 conditions, 549477 events. 397470/549477 cut-off events. For 435108/435108 co-relation queries the response was YES. Maximal size of possible extension queue 13422. Compared 4217234 event pairs, 292024 based on Foata normal form. 10712/501853 useless extension candidates. Maximal degree in co-relation 1466422. Up to 331509 conditions per place. [2023-08-30 15:05:44,722 INFO L137 encePairwiseOnDemand]: 651/657 looper letters, 195 selfloop transitions, 16 changer transitions 0/211 dead transitions. [2023-08-30 15:05:44,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 211 transitions, 1667 flow [2023-08-30 15:05:44,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:05:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:05:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1603 transitions. [2023-08-30 15:05:44,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879756468797565 [2023-08-30 15:05:44,726 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1603 transitions. [2023-08-30 15:05:44,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1603 transitions. [2023-08-30 15:05:44,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:05:44,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1603 transitions. [2023-08-30 15:05:44,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.6) internal successors, (1603), 5 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states 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 15:05:44,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 657.0) internal successors, (3942), 6 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states 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 15:05:44,732 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 657.0) internal successors, (3942), 6 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states 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 15:05:44,732 INFO L175 Difference]: Start difference. First operand has 106 places, 123 transitions, 915 flow. Second operand 5 states and 1603 transitions. [2023-08-30 15:05:44,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 211 transitions, 1667 flow [2023-08-30 15:05:56,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 211 transitions, 1626 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 15:05:56,678 INFO L231 Difference]: Finished difference. Result has 112 places, 124 transitions, 934 flow [2023-08-30 15:05:56,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=934, PETRI_PLACES=112, PETRI_TRANSITIONS=124} [2023-08-30 15:05:56,679 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2023-08-30 15:05:56,679 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 124 transitions, 934 flow [2023-08-30 15:05:56,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 297.75) internal successors, (1191), 4 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states 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 15:05:56,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:05:56,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:05:56,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 15:05:56,680 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:05:56,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:05:56,681 INFO L85 PathProgramCache]: Analyzing trace with hash 98528532, now seen corresponding path program 1 times [2023-08-30 15:05:56,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:05:56,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495690622] [2023-08-30 15:05:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:05:56,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:05:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:05:56,774 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 15:05:56,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:05:56,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495690622] [2023-08-30 15:05:56,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495690622] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:05:56,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364867077] [2023-08-30 15:05:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:05:56,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:05:56,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:05:56,781 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 15:05:56,800 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 15:05:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:05:56,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 15:05:56,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:05:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:05:56,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:05:56,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364867077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:05:56,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:05:56,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 15:05:56,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913498694] [2023-08-30 15:05:56,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:05:56,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:05:56,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:05:56,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:05:56,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:05:56,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 657 [2023-08-30 15:05:56,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 124 transitions, 934 flow. Second operand has 3 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 0 states have call successors, (0), 0 states 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 15:05:56,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:05:56,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 657 [2023-08-30 15:05:56,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:06:41,383 INFO L130 PetriNetUnfolder]: 335670/463341 cut-off events. [2023-08-30 15:06:41,384 INFO L131 PetriNetUnfolder]: For 479424/479424 co-relation queries the response was YES. [2023-08-30 15:06:43,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1226446 conditions, 463341 events. 335670/463341 cut-off events. For 479424/479424 co-relation queries the response was YES. Maximal size of possible extension queue 11219. Compared 3475599 event pairs, 262476 based on Foata normal form. 23376/433633 useless extension candidates. Maximal degree in co-relation 1226408. Up to 463341 conditions per place. [2023-08-30 15:06:45,146 INFO L137 encePairwiseOnDemand]: 654/657 looper letters, 120 selfloop transitions, 1 changer transitions 0/121 dead transitions. [2023-08-30 15:06:45,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 121 transitions, 1151 flow [2023-08-30 15:06:45,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:06:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:06:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 971 transitions. [2023-08-30 15:06:45,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4926433282597666 [2023-08-30 15:06:45,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 971 transitions. [2023-08-30 15:06:45,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 971 transitions. [2023-08-30 15:06:45,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:06:45,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 971 transitions. [2023-08-30 15:06:45,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.6666666666667) internal successors, (971), 3 states have internal predecessors, (971), 0 states have call successors, (0), 0 states 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 15:06:45,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 15:06:45,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 657.0) internal successors, (2628), 4 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 15:06:45,151 INFO L175 Difference]: Start difference. First operand has 112 places, 124 transitions, 934 flow. Second operand 3 states and 971 transitions. [2023-08-30 15:06:45,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 121 transitions, 1151 flow [2023-08-30 15:06:58,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 121 transitions, 1126 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 15:06:58,168 INFO L231 Difference]: Finished difference. Result has 105 places, 121 transitions, 886 flow [2023-08-30 15:06:58,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=657, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=103, 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=886, PETRI_PLACES=105, PETRI_TRANSITIONS=121} [2023-08-30 15:06:58,168 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2023-08-30 15:06:58,168 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 121 transitions, 886 flow [2023-08-30 15:06:58,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 0 states have call successors, (0), 0 states 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 15:06:58,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:06:58,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:06:58,176 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 15:06:58,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:06:58,369 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 30 more)] === [2023-08-30 15:06:58,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:06:58,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2065241530, now seen corresponding path program 1 times [2023-08-30 15:06:58,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:06:58,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300662272] [2023-08-30 15:06:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:06:58,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:06:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:06:58,459 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 15:06:58,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:06:58,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300662272] [2023-08-30 15:06:58,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300662272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:06:58,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698730260] [2023-08-30 15:06:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:06:58,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:06:58,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:06:58,461 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 15:06:58,466 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 15:06:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:06:58,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 15:06:58,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:06:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:06:58,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:06:58,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698730260] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:06:58,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:06:58,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-08-30 15:06:58,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093785618] [2023-08-30 15:06:58,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:06:58,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:06:58,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:06:58,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:06:58,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:06:58,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 657 [2023-08-30 15:06:58,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 121 transitions, 886 flow. Second operand has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states 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 15:06:58,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:06:58,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 657 [2023-08-30 15:06:58,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand