./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 11:31:54,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:31:54,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:31:54,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:31:54,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:31:54,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:31:54,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:31:54,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:31:54,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:31:54,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:31:54,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:31:54,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:31:54,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:31:54,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:31:54,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:31:54,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:31:54,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:31:54,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:31:54,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:31:54,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:31:54,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:31:54,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:31:54,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:31:54,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:31:54,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:31:54,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:31:54,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:31:54,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:31:54,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:31:54,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:31:54,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:31:54,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:31:54,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:31:54,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:31:54,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:31:54,935 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:31:54,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:31:54,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:31:54,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:31:54,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:31:54,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:31:54,938 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:31:54,970 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:31:54,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:31:54,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:31:54,971 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:31:54,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:31:54,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:31:54,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:31:54,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:31:54,973 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:31:54,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:31:54,974 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:31:54,974 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:31:54,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:31:54,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:31:54,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:31:54,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:31:54,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:31:54,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:31:54,976 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:31:54,976 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:31:54,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:31:54,976 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:31:54,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:31:54,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:31:54,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:31:54,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:31:54,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:31:54,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:31:54,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:31:54,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:31:54,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:31:54,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:31:54,979 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:31:54,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:31:54,979 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:31:54,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:31:54,979 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:31:54,979 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:31:55,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:31:55,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:31:55,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:31:55,267 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:31:55,268 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:31:55,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-30 11:31:56,378 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:31:56,597 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:31:56,597 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-30 11:31:56,606 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/441e66a9d/4a8a267387824102b0aef4ba9b73fa60/FLAG165123948 [2023-08-30 11:31:56,617 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/441e66a9d/4a8a267387824102b0aef4ba9b73fa60 [2023-08-30 11:31:56,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:31:56,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:31:56,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:31:56,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:31:56,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:31:56,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7368cc1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56, skipping insertion in model container [2023-08-30 11:31:56,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:31:56,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:31:56,806 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c[2507,2520] [2023-08-30 11:31:56,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:31:56,820 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:31:56,858 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c[2507,2520] [2023-08-30 11:31:56,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:31:56,873 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:31:56,874 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:31:56,879 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:31:56,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56 WrapperNode [2023-08-30 11:31:56,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:31:56,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:31:56,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:31:56,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:31:56,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,929 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 130 [2023-08-30 11:31:56,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:31:56,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:31:56,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:31:56,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:31:56,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,972 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:31:56,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:31:56,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:31:56,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:31:56,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56" (1/1) ... [2023-08-30 11:31:56,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:31:56,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:31:57,014 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 11:31:57,039 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 11:31:57,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:31:57,055 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:31:57,055 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:31:57,055 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:31:57,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:31:57,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 11:31:57,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 11:31:57,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 11:31:57,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 11:31:57,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:31:57,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:31:57,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:31:57,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:31:57,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:31:57,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:31:57,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:31:57,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:31:57,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:31:57,058 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 11:31:57,168 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:31:57,171 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:31:57,467 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:31:57,530 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:31:57,530 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 11:31:57,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:31:57 BoogieIcfgContainer [2023-08-30 11:31:57,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:31:57,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:31:57,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:31:57,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:31:57,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:31:56" (1/3) ... [2023-08-30 11:31:57,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa0d82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:31:57, skipping insertion in model container [2023-08-30 11:31:57,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:31:56" (2/3) ... [2023-08-30 11:31:57,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa0d82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:31:57, skipping insertion in model container [2023-08-30 11:31:57,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:31:57" (3/3) ... [2023-08-30 11:31:57,539 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-08-30 11:31:57,546 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:31:57,555 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:31:57,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 11:31:57,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:31:57,665 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 11:31:57,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 147 transitions, 326 flow [2023-08-30 11:31:57,797 INFO L130 PetriNetUnfolder]: 9/143 cut-off events. [2023-08-30 11:31:57,797 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 11:31:57,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 143 events. 9/143 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 198 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-30 11:31:57,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 147 transitions, 326 flow [2023-08-30 11:31:57,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 123 transitions, 267 flow [2023-08-30 11:31:57,814 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:31:57,828 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 123 transitions, 267 flow [2023-08-30 11:31:57,832 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 123 transitions, 267 flow [2023-08-30 11:31:57,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 123 transitions, 267 flow [2023-08-30 11:31:57,875 INFO L130 PetriNetUnfolder]: 8/123 cut-off events. [2023-08-30 11:31:57,875 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 11:31:57,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 123 events. 8/123 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 197 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-30 11:31:57,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 5184 [2023-08-30 11:32:01,896 INFO L134 LiptonReduction]: Checked pairs total: 5873 [2023-08-30 11:32:01,897 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-30 11:32:01,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:32:01,913 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;@75069da4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:32:01,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-08-30 11:32:01,916 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 11:32:01,916 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:32:01,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:01,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:32:01,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:01,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:01,921 INFO L85 PathProgramCache]: Analyzing trace with hash 18815922, now seen corresponding path program 1 times [2023-08-30 11:32:01,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:01,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053078231] [2023-08-30 11:32:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:01,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:02,131 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 11:32:02,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:02,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053078231] [2023-08-30 11:32:02,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053078231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:02,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:02,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:32:02,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998810537] [2023-08-30 11:32:02,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:02,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:02,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:02,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:02,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:02,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 11:32:02,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:02,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:02,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 11:32:02,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:04,050 INFO L130 PetriNetUnfolder]: 21542/25755 cut-off events. [2023-08-30 11:32:04,050 INFO L131 PetriNetUnfolder]: For 427/427 co-relation queries the response was YES. [2023-08-30 11:32:04,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52112 conditions, 25755 events. 21542/25755 cut-off events. For 427/427 co-relation queries the response was YES. Maximal size of possible extension queue 1706. Compared 108892 event pairs, 10472 based on Foata normal form. 0/6846 useless extension candidates. Maximal degree in co-relation 44904. Up to 25461 conditions per place. [2023-08-30 11:32:04,260 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 35 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 11:32:04,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 173 flow [2023-08-30 11:32:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2023-08-30 11:32:04,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236220472440944 [2023-08-30 11:32:04,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2023-08-30 11:32:04,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2023-08-30 11:32:04,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:04,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2023-08-30 11:32:04,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:04,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:04,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:04,296 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 107 flow. Second operand 3 states and 399 transitions. [2023-08-30 11:32:04,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 173 flow [2023-08-30 11:32:04,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 11:32:04,331 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 90 flow [2023-08-30 11:32:04,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-30 11:32:04,338 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-08-30 11:32:04,338 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 90 flow [2023-08-30 11:32:04,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:04,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:04,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:32:04,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:32:04,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:04,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:04,348 INFO L85 PathProgramCache]: Analyzing trace with hash 18815991, now seen corresponding path program 1 times [2023-08-30 11:32:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:04,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827235167] [2023-08-30 11:32:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:04,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:04,452 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 11:32:04,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:04,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827235167] [2023-08-30 11:32:04,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827235167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:04,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:04,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:32:04,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006456268] [2023-08-30 11:32:04,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:04,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:04,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:04,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:04,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:04,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 11:32:04,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:04,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:04,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 11:32:04,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:06,886 INFO L130 PetriNetUnfolder]: 31787/38406 cut-off events. [2023-08-30 11:32:06,887 INFO L131 PetriNetUnfolder]: For 251/251 co-relation queries the response was YES. [2023-08-30 11:32:06,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77346 conditions, 38406 events. 31787/38406 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 2548. Compared 177565 event pairs, 7655 based on Foata normal form. 0/11246 useless extension candidates. Maximal degree in co-relation 77340. Up to 23318 conditions per place. [2023-08-30 11:32:07,058 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 67 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-30 11:32:07,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 72 transitions, 299 flow [2023-08-30 11:32:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-30 11:32:07,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616797900262467 [2023-08-30 11:32:07,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-30 11:32:07,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-30 11:32:07,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:07,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-30 11:32:07,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:07,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:07,064 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:07,065 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 90 flow. Second operand 3 states and 428 transitions. [2023-08-30 11:32:07,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 72 transitions, 299 flow [2023-08-30 11:32:07,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 72 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:07,066 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 103 flow [2023-08-30 11:32:07,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-08-30 11:32:07,067 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-08-30 11:32:07,068 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 103 flow [2023-08-30 11:32:07,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:07,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:07,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:32:07,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 11:32:07,069 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:07,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:07,069 INFO L85 PathProgramCache]: Analyzing trace with hash 18815923, now seen corresponding path program 1 times [2023-08-30 11:32:07,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:07,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032941774] [2023-08-30 11:32:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:07,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:07,114 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 11:32:07,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:07,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032941774] [2023-08-30 11:32:07,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032941774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:07,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:07,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:32:07,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58852293] [2023-08-30 11:32:07,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:07,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:07,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:07,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 11:32:07,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:07,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:07,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 11:32:07,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:08,623 INFO L130 PetriNetUnfolder]: 21203/25485 cut-off events. [2023-08-30 11:32:08,623 INFO L131 PetriNetUnfolder]: For 783/967 co-relation queries the response was YES. [2023-08-30 11:32:08,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53637 conditions, 25485 events. 21203/25485 cut-off events. For 783/967 co-relation queries the response was YES. Maximal size of possible extension queue 1909. Compared 110441 event pairs, 3443 based on Foata normal form. 184/8413 useless extension candidates. Maximal degree in co-relation 53630. Up to 22635 conditions per place. [2023-08-30 11:32:08,740 INFO L137 encePairwiseOnDemand]: 247/254 looper letters, 61 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-30 11:32:08,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 288 flow [2023-08-30 11:32:08,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-30 11:32:08,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616797900262467 [2023-08-30 11:32:08,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-30 11:32:08,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-30 11:32:08,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:08,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-30 11:32:08,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:08,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:08,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:08,747 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 103 flow. Second operand 3 states and 428 transitions. [2023-08-30 11:32:08,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 288 flow [2023-08-30 11:32:08,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:08,749 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 117 flow [2023-08-30 11:32:08,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-08-30 11:32:08,750 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-08-30 11:32:08,753 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 117 flow [2023-08-30 11:32:08,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:08,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:08,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:32:08,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 11:32:08,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:08,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:08,755 INFO L85 PathProgramCache]: Analyzing trace with hash 583296324, now seen corresponding path program 1 times [2023-08-30 11:32:08,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:08,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219664688] [2023-08-30 11:32:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:08,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:08,817 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 11:32:08,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:08,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219664688] [2023-08-30 11:32:08,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219664688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:08,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136361845] [2023-08-30 11:32:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:08,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:08,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:08,821 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 11:32:08,840 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 11:32:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:08,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:32:08,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:08,928 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 11:32:08,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:08,943 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 11:32:08,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136361845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:08,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:08,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 11:32:08,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454185742] [2023-08-30 11:32:08,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:08,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:32:08,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:08,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:32:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:32:08,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 11:32:08,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 117 flow. Second operand has 7 states, 7 states have (on average 120.42857142857143) internal successors, (843), 7 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:08,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:08,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 11:32:08,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:12,540 INFO L130 PetriNetUnfolder]: 60651/72351 cut-off events. [2023-08-30 11:32:12,540 INFO L131 PetriNetUnfolder]: For 4457/4457 co-relation queries the response was YES. [2023-08-30 11:32:12,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168253 conditions, 72351 events. 60651/72351 cut-off events. For 4457/4457 co-relation queries the response was YES. Maximal size of possible extension queue 3937. Compared 342309 event pairs, 3897 based on Foata normal form. 0/29284 useless extension candidates. Maximal degree in co-relation 168244. Up to 19309 conditions per place. [2023-08-30 11:32:12,925 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 177 selfloop transitions, 9 changer transitions 0/189 dead transitions. [2023-08-30 11:32:12,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 189 transitions, 867 flow [2023-08-30 11:32:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:32:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:32:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1022 transitions. [2023-08-30 11:32:12,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748031496062992 [2023-08-30 11:32:12,929 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1022 transitions. [2023-08-30 11:32:12,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1022 transitions. [2023-08-30 11:32:12,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:12,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1022 transitions. [2023-08-30 11:32:12,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 146.0) internal successors, (1022), 7 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:12,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:12,935 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:12,935 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 117 flow. Second operand 7 states and 1022 transitions. [2023-08-30 11:32:12,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 189 transitions, 867 flow [2023-08-30 11:32:12,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 189 transitions, 863 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:32:12,939 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 172 flow [2023-08-30 11:32:12,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=172, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-08-30 11:32:12,941 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-30 11:32:12,942 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 172 flow [2023-08-30 11:32:12,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.42857142857143) internal successors, (843), 7 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:12,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:12,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:32:12,951 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 11:32:13,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:13,152 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:13,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:13,153 INFO L85 PathProgramCache]: Analyzing trace with hash 583296256, now seen corresponding path program 1 times [2023-08-30 11:32:13,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:13,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10007907] [2023-08-30 11:32:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:13,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:13,224 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 11:32:13,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:13,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10007907] [2023-08-30 11:32:13,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10007907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:13,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819906912] [2023-08-30 11:32:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:13,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:13,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:13,229 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 11:32:13,232 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 11:32:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:32:13,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:13,306 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 11:32:13,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:13,324 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 11:32:13,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819906912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:13,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:13,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:32:13,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771496872] [2023-08-30 11:32:13,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:13,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:32:13,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:13,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:32:13,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:32:13,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 11:32:13,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 121.57142857142857) internal successors, (851), 7 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:13,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:13,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 11:32:13,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:20,168 INFO L130 PetriNetUnfolder]: 110345/134059 cut-off events. [2023-08-30 11:32:20,169 INFO L131 PetriNetUnfolder]: For 34245/34613 co-relation queries the response was YES. [2023-08-30 11:32:20,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327290 conditions, 134059 events. 110345/134059 cut-off events. For 34245/34613 co-relation queries the response was YES. Maximal size of possible extension queue 6518. Compared 721030 event pairs, 14499 based on Foata normal form. 6862/65083 useless extension candidates. Maximal degree in co-relation 327279. Up to 32506 conditions per place. [2023-08-30 11:32:21,096 INFO L137 encePairwiseOnDemand]: 245/254 looper letters, 142 selfloop transitions, 38 changer transitions 0/184 dead transitions. [2023-08-30 11:32:21,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 184 transitions, 979 flow [2023-08-30 11:32:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:32:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:32:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 892 transitions. [2023-08-30 11:32:21,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853018372703412 [2023-08-30 11:32:21,104 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 892 transitions. [2023-08-30 11:32:21,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 892 transitions. [2023-08-30 11:32:21,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:21,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 892 transitions. [2023-08-30 11:32:21,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.66666666666666) internal successors, (892), 6 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:21,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:21,114 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:21,114 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 172 flow. Second operand 6 states and 892 transitions. [2023-08-30 11:32:21,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 184 transitions, 979 flow [2023-08-30 11:32:21,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 184 transitions, 941 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:21,313 INFO L231 Difference]: Finished difference. Result has 63 places, 77 transitions, 519 flow [2023-08-30 11:32:21,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=519, PETRI_PLACES=63, PETRI_TRANSITIONS=77} [2023-08-30 11:32:21,314 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 11 predicate places. [2023-08-30 11:32:21,314 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 77 transitions, 519 flow [2023-08-30 11:32:21,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 121.57142857142857) internal successors, (851), 7 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:21,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:21,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:32:21,325 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 11:32:21,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:21,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:21,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash 583296302, now seen corresponding path program 1 times [2023-08-30 11:32:21,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:21,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187532479] [2023-08-30 11:32:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:21,547 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 11:32:21,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:21,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187532479] [2023-08-30 11:32:21,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187532479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:21,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:21,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:32:21,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443198732] [2023-08-30 11:32:21,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:21,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:21,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:21,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:21,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:21,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 11:32:21,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 519 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:21,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:21,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 11:32:21,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:28,046 INFO L130 PetriNetUnfolder]: 96553/118061 cut-off events. [2023-08-30 11:32:28,046 INFO L131 PetriNetUnfolder]: For 116056/116056 co-relation queries the response was YES. [2023-08-30 11:32:28,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328810 conditions, 118061 events. 96553/118061 cut-off events. For 116056/116056 co-relation queries the response was YES. Maximal size of possible extension queue 5783. Compared 616725 event pairs, 43447 based on Foata normal form. 1904/55813 useless extension candidates. Maximal degree in co-relation 328793. Up to 117338 conditions per place. [2023-08-30 11:32:28,808 INFO L137 encePairwiseOnDemand]: 252/254 looper letters, 78 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-30 11:32:28,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 592 flow [2023-08-30 11:32:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2023-08-30 11:32:28,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541994750656168 [2023-08-30 11:32:28,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2023-08-30 11:32:28,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2023-08-30 11:32:28,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:28,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2023-08-30 11:32:28,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:28,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:28,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:28,814 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 519 flow. Second operand 3 states and 413 transitions. [2023-08-30 11:32:28,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 592 flow [2023-08-30 11:32:29,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 550 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-08-30 11:32:29,963 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 352 flow [2023-08-30 11:32:29,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2023-08-30 11:32:29,964 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 11 predicate places. [2023-08-30 11:32:29,964 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 352 flow [2023-08-30 11:32:29,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:29,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:29,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:29,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 11:32:29,965 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:29,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:29,966 INFO L85 PathProgramCache]: Analyzing trace with hash -95000540, now seen corresponding path program 1 times [2023-08-30 11:32:29,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:29,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577644212] [2023-08-30 11:32:29,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:29,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:30,003 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 11:32:30,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:30,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577644212] [2023-08-30 11:32:30,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577644212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:30,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:30,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:32:30,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725640542] [2023-08-30 11:32:30,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:30,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:30,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:30,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:30,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:30,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 11:32:30,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:30,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:30,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 11:32:30,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:36,981 INFO L130 PetriNetUnfolder]: 101469/125083 cut-off events. [2023-08-30 11:32:36,981 INFO L131 PetriNetUnfolder]: For 77616/78200 co-relation queries the response was YES. [2023-08-30 11:32:37,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322522 conditions, 125083 events. 101469/125083 cut-off events. For 77616/78200 co-relation queries the response was YES. Maximal size of possible extension queue 6527. Compared 707672 event pairs, 46543 based on Foata normal form. 584/58472 useless extension candidates. Maximal degree in co-relation 322504. Up to 102189 conditions per place. [2023-08-30 11:32:37,699 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 91 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2023-08-30 11:32:37,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 98 transitions, 689 flow [2023-08-30 11:32:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:37,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-08-30 11:32:37,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564304461942258 [2023-08-30 11:32:37,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-08-30 11:32:37,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-08-30 11:32:37,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:37,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-08-30 11:32:37,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:37,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:37,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:37,703 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 352 flow. Second operand 3 states and 424 transitions. [2023-08-30 11:32:37,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 98 transitions, 689 flow [2023-08-30 11:32:38,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 98 transitions, 669 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-30 11:32:38,724 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 389 flow [2023-08-30 11:32:38,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=389, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-08-30 11:32:38,725 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2023-08-30 11:32:38,725 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 389 flow [2023-08-30 11:32:38,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:38,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:38,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:38,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 11:32:38,725 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:38,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash -90592928, now seen corresponding path program 1 times [2023-08-30 11:32:38,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:38,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717851717] [2023-08-30 11:32:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:38,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:38,765 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 11:32:38,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:38,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717851717] [2023-08-30 11:32:38,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717851717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:38,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:38,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:32:38,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332887336] [2023-08-30 11:32:38,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:38,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:38,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:38,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 11:32:38,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:38,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:38,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 11:32:38,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:44,186 INFO L130 PetriNetUnfolder]: 77955/99496 cut-off events. [2023-08-30 11:32:44,186 INFO L131 PetriNetUnfolder]: For 116618/118308 co-relation queries the response was YES. [2023-08-30 11:32:44,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273214 conditions, 99496 events. 77955/99496 cut-off events. For 116618/118308 co-relation queries the response was YES. Maximal size of possible extension queue 5711. Compared 573672 event pairs, 10703 based on Foata normal form. 1690/52994 useless extension candidates. Maximal degree in co-relation 273196. Up to 90589 conditions per place. [2023-08-30 11:32:44,757 INFO L137 encePairwiseOnDemand]: 244/254 looper letters, 106 selfloop transitions, 4 changer transitions 2/116 dead transitions. [2023-08-30 11:32:44,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 116 transitions, 956 flow [2023-08-30 11:32:44,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-08-30 11:32:44,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564304461942258 [2023-08-30 11:32:44,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-08-30 11:32:44,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-08-30 11:32:44,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:44,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-08-30 11:32:44,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,762 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 389 flow. Second operand 3 states and 424 transitions. [2023-08-30 11:32:44,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 116 transitions, 956 flow [2023-08-30 11:32:44,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 116 transitions, 949 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:44,832 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 421 flow [2023-08-30 11:32:44,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-08-30 11:32:44,833 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2023-08-30 11:32:44,833 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 421 flow [2023-08-30 11:32:44,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:44,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:32:44,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 11:32:44,834 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:44,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:44,834 INFO L85 PathProgramCache]: Analyzing trace with hash -90592878, now seen corresponding path program 1 times [2023-08-30 11:32:44,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:44,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277144778] [2023-08-30 11:32:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:44,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:44,872 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 11:32:44,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:44,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277144778] [2023-08-30 11:32:44,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277144778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:32:44,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:32:44,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:32:44,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536735402] [2023-08-30 11:32:44,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:32:44,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:32:44,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:44,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:32:44,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:32:44,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 11:32:44,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 421 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:44,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:44,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 11:32:44,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:32:50,964 INFO L130 PetriNetUnfolder]: 78301/101014 cut-off events. [2023-08-30 11:32:50,965 INFO L131 PetriNetUnfolder]: For 102488/105314 co-relation queries the response was YES. [2023-08-30 11:32:51,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319098 conditions, 101014 events. 78301/101014 cut-off events. For 102488/105314 co-relation queries the response was YES. Maximal size of possible extension queue 5767. Compared 630652 event pairs, 48549 based on Foata normal form. 1778/66396 useless extension candidates. Maximal degree in co-relation 319078. Up to 91819 conditions per place. [2023-08-30 11:32:51,821 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 107 selfloop transitions, 2 changer transitions 2/114 dead transitions. [2023-08-30 11:32:51,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 114 transitions, 967 flow [2023-08-30 11:32:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:32:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:32:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2023-08-30 11:32:51,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459317585301837 [2023-08-30 11:32:51,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2023-08-30 11:32:51,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2023-08-30 11:32:51,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:32:51,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2023-08-30 11:32:51,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:51,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:51,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:51,825 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 421 flow. Second operand 3 states and 416 transitions. [2023-08-30 11:32:51,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 114 transitions, 967 flow [2023-08-30 11:32:52,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 965 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:32:52,158 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 413 flow [2023-08-30 11:32:52,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=413, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-08-30 11:32:52,159 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2023-08-30 11:32:52,159 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 413 flow [2023-08-30 11:32:52,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:52,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:32:52,160 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 11:32:52,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 11:32:52,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:32:52,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:32:52,161 INFO L85 PathProgramCache]: Analyzing trace with hash -456292621, now seen corresponding path program 2 times [2023-08-30 11:32:52,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:32:52,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792911670] [2023-08-30 11:32:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:32:52,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:32:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:32:52,220 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 11:32:52,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:32:52,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792911670] [2023-08-30 11:32:52,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792911670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:32:52,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028278608] [2023-08-30 11:32:52,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:32:52,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:32:52,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:32:52,222 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 11:32:52,224 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 11:32:52,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:32:52,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:32:52,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 11:32:52,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:32:52,303 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 11:32:52,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:32:52,351 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 11:32:52,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028278608] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:32:52,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:32:52,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 11:32:52,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176808137] [2023-08-30 11:32:52,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:32:52,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 11:32:52,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:32:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 11:32:52,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 11:32:52,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 11:32:52,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 413 flow. Second operand has 13 states, 13 states have (on average 121.3076923076923) internal successors, (1577), 13 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:32:52,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:32:52,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 11:32:52,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:07,415 INFO L130 PetriNetUnfolder]: 183717/235635 cut-off events. [2023-08-30 11:33:07,416 INFO L131 PetriNetUnfolder]: For 282517/287411 co-relation queries the response was YES. [2023-08-30 11:33:08,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734241 conditions, 235635 events. 183717/235635 cut-off events. For 282517/287411 co-relation queries the response was YES. Maximal size of possible extension queue 12404. Compared 1572154 event pairs, 24711 based on Foata normal form. 16094/159661 useless extension candidates. Maximal degree in co-relation 734221. Up to 93229 conditions per place. [2023-08-30 11:33:09,236 INFO L137 encePairwiseOnDemand]: 246/254 looper letters, 310 selfloop transitions, 97 changer transitions 0/411 dead transitions. [2023-08-30 11:33:09,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 411 transitions, 2643 flow [2023-08-30 11:33:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:33:09,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:33:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1805 transitions. [2023-08-30 11:33:09,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921916010498688 [2023-08-30 11:33:09,240 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1805 transitions. [2023-08-30 11:33:09,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1805 transitions. [2023-08-30 11:33:09,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:09,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1805 transitions. [2023-08-30 11:33:09,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 150.41666666666666) internal successors, (1805), 12 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:09,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:09,250 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:09,250 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 413 flow. Second operand 12 states and 1805 transitions. [2023-08-30 11:33:09,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 411 transitions, 2643 flow [2023-08-30 11:33:09,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 411 transitions, 2619 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:33:09,851 INFO L231 Difference]: Finished difference. Result has 86 places, 141 transitions, 1440 flow [2023-08-30 11:33:09,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1440, PETRI_PLACES=86, PETRI_TRANSITIONS=141} [2023-08-30 11:33:09,853 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2023-08-30 11:33:09,853 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 141 transitions, 1440 flow [2023-08-30 11:33:09,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 121.3076923076923) internal successors, (1577), 13 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:09,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:09,854 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 11:33:09,859 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 11:33:10,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:10,056 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:33:10,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:10,057 INFO L85 PathProgramCache]: Analyzing trace with hash -456292553, now seen corresponding path program 2 times [2023-08-30 11:33:10,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:10,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913827338] [2023-08-30 11:33:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:10,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:10,148 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 11:33:10,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:10,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913827338] [2023-08-30 11:33:10,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913827338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:10,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638846210] [2023-08-30 11:33:10,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:33:10,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:10,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:10,150 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 11:33:10,152 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 11:33:10,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:33:10,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:33:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:33:10,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:10,234 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 11:33:10,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:33:10,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638846210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:33:10,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:33:10,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-30 11:33:10,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353972782] [2023-08-30 11:33:10,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:33:10,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:33:10,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:33:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:33:10,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 11:33:10,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 141 transitions, 1440 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:10,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:10,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 11:33:10,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:33:22,717 INFO L130 PetriNetUnfolder]: 128123/165014 cut-off events. [2023-08-30 11:33:22,717 INFO L131 PetriNetUnfolder]: For 322283/325469 co-relation queries the response was YES. [2023-08-30 11:33:23,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573749 conditions, 165014 events. 128123/165014 cut-off events. For 322283/325469 co-relation queries the response was YES. Maximal size of possible extension queue 8679. Compared 1085567 event pairs, 84713 based on Foata normal form. 5442/112572 useless extension candidates. Maximal degree in co-relation 573719. Up to 164882 conditions per place. [2023-08-30 11:33:23,996 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 116 selfloop transitions, 1 changer transitions 0/121 dead transitions. [2023-08-30 11:33:23,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 1476 flow [2023-08-30 11:33:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:33:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:33:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-30 11:33:23,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144356955380578 [2023-08-30 11:33:23,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-30 11:33:23,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-30 11:33:23,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:33:23,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-30 11:33:24,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:24,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:24,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:24,001 INFO L175 Difference]: Start difference. First operand has 86 places, 141 transitions, 1440 flow. Second operand 3 states and 392 transitions. [2023-08-30 11:33:24,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 1476 flow [2023-08-30 11:33:28,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 121 transitions, 1257 flow, removed 97 selfloop flow, removed 4 redundant places. [2023-08-30 11:33:28,279 INFO L231 Difference]: Finished difference. Result has 82 places, 121 transitions, 1025 flow [2023-08-30 11:33:28,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1025, PETRI_PLACES=82, PETRI_TRANSITIONS=121} [2023-08-30 11:33:28,280 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2023-08-30 11:33:28,280 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 121 transitions, 1025 flow [2023-08-30 11:33:28,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:28,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:33:28,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:33:28,294 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 11:33:28,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:28,493 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:33:28,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:33:28,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1486588999, now seen corresponding path program 1 times [2023-08-30 11:33:28,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:33:28,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317060205] [2023-08-30 11:33:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:28,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:33:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:28,530 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 11:33:28,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:33:28,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317060205] [2023-08-30 11:33:28,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317060205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:33:28,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409977022] [2023-08-30 11:33:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:33:28,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:33:28,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:33:28,532 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 11:33:28,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 11:33:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:33:28,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:33:28,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:33:28,619 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 11:33:28,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:33:28,652 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 11:33:28,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409977022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:33:28,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:33:28,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:33:28,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975724697] [2023-08-30 11:33:28,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:33:28,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:33:28,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:33:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:33:28,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:33:28,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 11:33:28,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 121 transitions, 1025 flow. Second operand has 7 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:33:28,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:33:28,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 11:33:28,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:34:02,193 INFO L130 PetriNetUnfolder]: 329587/424586 cut-off events. [2023-08-30 11:34:02,193 INFO L131 PetriNetUnfolder]: For 853622/860296 co-relation queries the response was YES. [2023-08-30 11:34:04,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378505 conditions, 424586 events. 329587/424586 cut-off events. For 853622/860296 co-relation queries the response was YES. Maximal size of possible extension queue 17220. Compared 2931151 event pairs, 34897 based on Foata normal form. 11398/299000 useless extension candidates. Maximal degree in co-relation 1378477. Up to 160473 conditions per place. [2023-08-30 11:34:05,808 INFO L137 encePairwiseOnDemand]: 245/254 looper letters, 624 selfloop transitions, 20 changer transitions 0/648 dead transitions. [2023-08-30 11:34:05,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 648 transitions, 7136 flow [2023-08-30 11:34:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:34:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:34:05,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1001 transitions. [2023-08-30 11:34:05,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562992125984252 [2023-08-30 11:34:05,812 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1001 transitions. [2023-08-30 11:34:05,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1001 transitions. [2023-08-30 11:34:05,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:34:05,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1001 transitions. [2023-08-30 11:34:05,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:05,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:05,818 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:05,818 INFO L175 Difference]: Start difference. First operand has 82 places, 121 transitions, 1025 flow. Second operand 7 states and 1001 transitions. [2023-08-30 11:34:05,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 648 transitions, 7136 flow [2023-08-30 11:34:08,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 648 transitions, 7135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:34:08,242 INFO L231 Difference]: Finished difference. Result has 92 places, 138 transitions, 1214 flow [2023-08-30 11:34:08,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1214, PETRI_PLACES=92, PETRI_TRANSITIONS=138} [2023-08-30 11:34:08,243 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 40 predicate places. [2023-08-30 11:34:08,243 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 138 transitions, 1214 flow [2023-08-30 11:34:08,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:08,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:34:08,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:34:08,248 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 11:34:08,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 11:34:08,444 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:34:08,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:34:08,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1160378848, now seen corresponding path program 1 times [2023-08-30 11:34:08,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:34:08,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200819514] [2023-08-30 11:34:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:34:08,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:34:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:08,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:34:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200819514] [2023-08-30 11:34:08,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200819514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:34:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377856701] [2023-08-30 11:34:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:34:08,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:34:08,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:34:08,513 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 11:34:08,517 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 11:34:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:34:08,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 11:34:08,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:34:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:34:08,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:34:08,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377856701] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:34:08,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:34:08,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 11:34:08,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768522122] [2023-08-30 11:34:08,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:34:08,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:34:08,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:34:08,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:34:08,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:34:08,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-08-30 11:34:08,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 138 transitions, 1214 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:34:08,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:34:08,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-08-30 11:34:08,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:35:08,306 INFO L130 PetriNetUnfolder]: 504731/658378 cut-off events. [2023-08-30 11:35:08,306 INFO L131 PetriNetUnfolder]: For 1947442/1958162 co-relation queries the response was YES. [2023-08-30 11:35:13,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2823311 conditions, 658378 events. 504731/658378 cut-off events. For 1947442/1958162 co-relation queries the response was YES. Maximal size of possible extension queue 24181. Compared 4830000 event pairs, 81101 based on Foata normal form. 51040/539798 useless extension candidates. Maximal degree in co-relation 2823277. Up to 254100 conditions per place. [2023-08-30 11:35:17,054 INFO L137 encePairwiseOnDemand]: 245/254 looper letters, 322 selfloop transitions, 35 changer transitions 0/361 dead transitions. [2023-08-30 11:35:17,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 361 transitions, 4015 flow [2023-08-30 11:35:17,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:35:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:35:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 687 transitions. [2023-08-30 11:35:17,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409448818897638 [2023-08-30 11:35:17,056 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 687 transitions. [2023-08-30 11:35:17,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 687 transitions. [2023-08-30 11:35:17,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:35:17,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 687 transitions. [2023-08-30 11:35:17,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:17,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:17,060 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:35:17,060 INFO L175 Difference]: Start difference. First operand has 92 places, 138 transitions, 1214 flow. Second operand 5 states and 687 transitions. [2023-08-30 11:35:17,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 361 transitions, 4015 flow [2023-08-30 11:37:40,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 361 transitions, 3961 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-08-30 11:37:40,161 INFO L231 Difference]: Finished difference. Result has 94 places, 157 transitions, 1471 flow [2023-08-30 11:37:40,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1471, PETRI_PLACES=94, PETRI_TRANSITIONS=157} [2023-08-30 11:37:40,161 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2023-08-30 11:37:40,161 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 157 transitions, 1471 flow [2023-08-30 11:37:40,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:40,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:37:40,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:37:40,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 11:37:40,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:37:40,363 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:37:40,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:37:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1486589035, now seen corresponding path program 1 times [2023-08-30 11:37:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:37:40,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177622201] [2023-08-30 11:37:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:37:40,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:37:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:37:40,388 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 11:37:40,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:37:40,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177622201] [2023-08-30 11:37:40,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177622201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:37:40,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:37:40,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:37:40,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599000923] [2023-08-30 11:37:40,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:37:40,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:37:40,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:37:40,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:37:40,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:37:40,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 11:37:40,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 157 transitions, 1471 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:37:40,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:37:40,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 11:37:40,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:38:25,654 INFO L130 PetriNetUnfolder]: 369119/482610 cut-off events. [2023-08-30 11:38:25,654 INFO L131 PetriNetUnfolder]: For 1484404/1492260 co-relation queries the response was YES. [2023-08-30 11:38:28,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2135469 conditions, 482610 events. 369119/482610 cut-off events. For 1484404/1492260 co-relation queries the response was YES. Maximal size of possible extension queue 17114. Compared 3386391 event pairs, 37757 based on Foata normal form. 7856/399322 useless extension candidates. Maximal degree in co-relation 2135433. Up to 474336 conditions per place. [2023-08-30 11:38:30,455 INFO L137 encePairwiseOnDemand]: 252/254 looper letters, 242 selfloop transitions, 1 changer transitions 0/246 dead transitions. [2023-08-30 11:38:30,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 246 transitions, 2807 flow [2023-08-30 11:38:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:38:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:38:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-08-30 11:38:30,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328083989501312 [2023-08-30 11:38:30,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-08-30 11:38:30,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-08-30 11:38:30,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:38:30,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-08-30 11:38:30,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:30,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:30,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:38:30,461 INFO L175 Difference]: Start difference. First operand has 94 places, 157 transitions, 1471 flow. Second operand 3 states and 406 transitions. [2023-08-30 11:38:30,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 246 transitions, 2807 flow [2023-08-30 11:39:13,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 246 transitions, 2728 flow, removed 39 selfloop flow, removed 1 redundant places. [2023-08-30 11:39:13,748 INFO L231 Difference]: Finished difference. Result has 94 places, 147 transitions, 1301 flow [2023-08-30 11:39:13,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1301, PETRI_PLACES=94, PETRI_TRANSITIONS=147} [2023-08-30 11:39:13,749 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2023-08-30 11:39:13,749 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 147 transitions, 1301 flow [2023-08-30 11:39:13,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:13,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:39:13,749 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:39:13,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 11:39:13,749 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:39:13,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:39:13,750 INFO L85 PathProgramCache]: Analyzing trace with hash -620992751, now seen corresponding path program 1 times [2023-08-30 11:39:13,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:39:13,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104980204] [2023-08-30 11:39:13,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:13,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:39:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:13,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:39:13,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104980204] [2023-08-30 11:39:13,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104980204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:39:13,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573281090] [2023-08-30 11:39:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:39:13,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:39:13,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:39:13,791 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 11:39:13,797 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 11:39:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:39:13,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:39:13,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:39:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:13,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:39:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:39:13,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573281090] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:39:13,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:39:13,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 11:39:13,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366369113] [2023-08-30 11:39:13,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:39:13,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:39:13,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:39:13,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:39:13,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:39:13,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 11:39:13,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 147 transitions, 1301 flow. Second operand has 7 states, 7 states have (on average 121.28571428571429) internal successors, (849), 7 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:39:13,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:39:13,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 11:39:13,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:40:32,446 INFO L130 PetriNetUnfolder]: 619493/800803 cut-off events. [2023-08-30 11:40:32,446 INFO L131 PetriNetUnfolder]: For 2110136/2111096 co-relation queries the response was YES. [2023-08-30 11:40:37,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3169900 conditions, 800803 events. 619493/800803 cut-off events. For 2110136/2111096 co-relation queries the response was YES. Maximal size of possible extension queue 22204. Compared 5655449 event pairs, 107704 based on Foata normal form. 776/652895 useless extension candidates. Maximal degree in co-relation 3169864. Up to 239991 conditions per place. [2023-08-30 11:40:40,441 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 447 selfloop transitions, 107 changer transitions 0/557 dead transitions. [2023-08-30 11:40:40,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 557 transitions, 5798 flow [2023-08-30 11:40:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:40:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:40:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 989 transitions. [2023-08-30 11:40:40,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562429696287964 [2023-08-30 11:40:40,444 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 989 transitions. [2023-08-30 11:40:40,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 989 transitions. [2023-08-30 11:40:40,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:40:40,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 989 transitions. [2023-08-30 11:40:40,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 141.28571428571428) internal successors, (989), 7 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:40,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:40,449 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:40:40,450 INFO L175 Difference]: Start difference. First operand has 94 places, 147 transitions, 1301 flow. Second operand 7 states and 989 transitions. [2023-08-30 11:40:40,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 557 transitions, 5798 flow [2023-08-30 11:42:30,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 557 transitions, 5797 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:42:30,663 INFO L231 Difference]: Finished difference. Result has 102 places, 229 transitions, 2547 flow [2023-08-30 11:42:30,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2547, PETRI_PLACES=102, PETRI_TRANSITIONS=229} [2023-08-30 11:42:30,663 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2023-08-30 11:42:30,664 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 229 transitions, 2547 flow [2023-08-30 11:42:30,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 121.28571428571429) internal successors, (849), 7 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:42:30,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:42:30,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:42:30,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 11:42:30,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:42:30,865 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-08-30 11:42:30,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:42:30,866 INFO L85 PathProgramCache]: Analyzing trace with hash -616552930, now seen corresponding path program 1 times [2023-08-30 11:42:30,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:42:30,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369901781] [2023-08-30 11:42:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:42:30,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:42:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:42:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:42:30,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:42:30,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369901781] [2023-08-30 11:42:30,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369901781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:42:30,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017630587] [2023-08-30 11:42:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:42:30,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:42:30,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:42:30,904 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 11:42:30,932 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 11:42:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:42:30,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:42:30,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:42:30,997 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 11:42:30,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:42:30,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017630587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:42:30,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:42:30,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 11:42:30,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969282634] [2023-08-30 11:42:30,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:42:31,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:42:31,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:42:31,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:42:31,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 11:42:31,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-08-30 11:42:31,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 229 transitions, 2547 flow. Second operand has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:42:31,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:42:31,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-08-30 11:42:31,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15