./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-4.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/parallel-misc-4.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 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 --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 11:14:59,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:14:59,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:14:59,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:14:59,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:14:59,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:14:59,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:14:59,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:14:59,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:14:59,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:14:59,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:14:59,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:14:59,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:14:59,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:14:59,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:14:59,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:14:59,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:14:59,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:14:59,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:14:59,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:14:59,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:14:59,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:14:59,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:14:59,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:14:59,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:14:59,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:14:59,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:14:59,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:14:59,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:14:59,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:14:59,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:14:59,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:14:59,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:14:59,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:14:59,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:14:59,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:14:59,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:14:59,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:14:59,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:14:59,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:14:59,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:14:59,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:14:59,975 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:14:59,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:14:59,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:14:59,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:14:59,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:14:59,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:14:59,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:14:59,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:14:59,978 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:14:59,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:14:59,979 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:14:59,979 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:14:59,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:14:59,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:14:59,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:14:59,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:14:59,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:14:59,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:14:59,980 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:14:59,981 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:14:59,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:14:59,981 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:14:59,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:14:59,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:14:59,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:14:59,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:14:59,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:14:59,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:14:59,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:14:59,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:14:59,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:14:59,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:14:59,983 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:14:59,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:14:59,983 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:14:59,983 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:14:59,983 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:14:59,983 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:15:00,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:15:00,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:15:00,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:15:00,261 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:15:00,261 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:15:00,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-08-30 11:15:01,338 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:15:01,511 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:15:01,512 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-08-30 11:15:01,518 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4e41b6ee/1c31c4659af14e6e83704be9fc974122/FLAG873a65cf8 [2023-08-30 11:15:01,531 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4e41b6ee/1c31c4659af14e6e83704be9fc974122 [2023-08-30 11:15:01,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:15:01,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:15:01,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:15:01,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:15:01,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:15:01,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c10b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01, skipping insertion in model container [2023-08-30 11:15:01,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:15:01,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:15:01,668 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c[2950,2963] [2023-08-30 11:15:01,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:15:01,678 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:15:01,707 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c[2950,2963] [2023-08-30 11:15:01,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:15:01,715 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:15:01,715 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:15:01,719 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:15:01,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01 WrapperNode [2023-08-30 11:15:01,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:15:01,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:15:01,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:15:01,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:15:01,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,753 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-08-30 11:15:01,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:15:01,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:15:01,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:15:01,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:15:01,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,784 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:15:01,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:15:01,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:15:01,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:15:01,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01" (1/1) ... [2023-08-30 11:15:01,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:15:01,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:01,826 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 11:15:01,831 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 11:15:01,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:15:01,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:15:01,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:15:01,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:15:01,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:15:01,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 11:15:01,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 11:15:01,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:15:01,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:15:01,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:15:01,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:15:01,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:15:01,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:15:01,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:15:01,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:15:01,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:15:01,850 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 11:15:01,927 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:15:01,928 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:15:02,112 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:15:02,158 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:15:02,158 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 11:15:02,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:15:02 BoogieIcfgContainer [2023-08-30 11:15:02,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:15:02,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:15:02,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:15:02,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:15:02,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:15:01" (1/3) ... [2023-08-30 11:15:02,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e6f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:15:02, skipping insertion in model container [2023-08-30 11:15:02,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:15:01" (2/3) ... [2023-08-30 11:15:02,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e6f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:15:02, skipping insertion in model container [2023-08-30 11:15:02,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:15:02" (3/3) ... [2023-08-30 11:15:02,165 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2023-08-30 11:15:02,169 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:15:02,175 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:15:02,175 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-08-30 11:15:02,175 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:15:02,266 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 11:15:02,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 110 transitions, 244 flow [2023-08-30 11:15:02,330 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2023-08-30 11:15:02,330 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 11:15:02,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 107 events. 7/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 114 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2023-08-30 11:15:02,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 110 transitions, 244 flow [2023-08-30 11:15:02,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 92 transitions, 196 flow [2023-08-30 11:15:02,342 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:15:02,351 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 92 transitions, 196 flow [2023-08-30 11:15:02,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 92 transitions, 196 flow [2023-08-30 11:15:02,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 92 transitions, 196 flow [2023-08-30 11:15:02,379 INFO L130 PetriNetUnfolder]: 7/92 cut-off events. [2023-08-30 11:15:02,379 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 11:15:02,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 92 events. 7/92 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 113 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2023-08-30 11:15:02,381 INFO L119 LiptonReduction]: Number of co-enabled transitions 1604 [2023-08-30 11:15:04,697 INFO L134 LiptonReduction]: Checked pairs total: 1874 [2023-08-30 11:15:04,697 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-30 11:15:04,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:15:04,729 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;@68b0d4f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:15:04,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-08-30 11:15:04,734 INFO L130 PetriNetUnfolder]: 0/4 cut-off events. [2023-08-30 11:15:04,734 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:15:04,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:04,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:15:04,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:04,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:04,742 INFO L85 PathProgramCache]: Analyzing trace with hash 13360126, now seen corresponding path program 1 times [2023-08-30 11:15:04,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:04,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359869332] [2023-08-30 11:15:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:05,051 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 11:15:05,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359869332] [2023-08-30 11:15:05,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359869332] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:15:05,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:15:05,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:15:05,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986480311] [2023-08-30 11:15:05,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:15:05,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:15:05,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:05,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:15:05,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:15:05,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-08-30 11:15:05,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:05,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:05,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-08-30 11:15:05,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:05,286 INFO L130 PetriNetUnfolder]: 1323/1787 cut-off events. [2023-08-30 11:15:05,286 INFO L131 PetriNetUnfolder]: For 118/118 co-relation queries the response was YES. [2023-08-30 11:15:05,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3750 conditions, 1787 events. 1323/1787 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 7192 event pairs, 231 based on Foata normal form. 0/806 useless extension candidates. Maximal degree in co-relation 3479. Up to 1713 conditions per place. [2023-08-30 11:15:05,298 INFO L137 encePairwiseOnDemand]: 186/197 looper letters, 33 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2023-08-30 11:15:05,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 169 flow [2023-08-30 11:15:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:15:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:15:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-30 11:15:05,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109983079526227 [2023-08-30 11:15:05,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-30 11:15:05,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-30 11:15:05,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:05,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-30 11:15:05,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:05,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:05,324 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:05,325 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 64 flow. Second operand 3 states and 302 transitions. [2023-08-30 11:15:05,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 169 flow [2023-08-30 11:15:05,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 159 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 11:15:05,329 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 91 flow [2023-08-30 11:15:05,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-30 11:15:05,336 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2023-08-30 11:15:05,337 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 91 flow [2023-08-30 11:15:05,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:05,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:05,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:15:05,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:15:05,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:05,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:05,341 INFO L85 PathProgramCache]: Analyzing trace with hash -45806983, now seen corresponding path program 1 times [2023-08-30 11:15:05,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:05,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941384581] [2023-08-30 11:15:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:05,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:05,399 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 11:15:05,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:05,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941384581] [2023-08-30 11:15:05,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941384581] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:15:05,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:15:05,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:15:05,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981776331] [2023-08-30 11:15:05,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:15:05,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:15:05,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:05,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:15:05,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:15:05,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-08-30 11:15:05,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:05,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:05,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-08-30 11:15:05,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:05,500 INFO L130 PetriNetUnfolder]: 993/1361 cut-off events. [2023-08-30 11:15:05,500 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-08-30 11:15:05,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 1361 events. 993/1361 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 5659 event pairs, 539 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 2011. Up to 1357 conditions per place. [2023-08-30 11:15:05,505 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 23 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 11:15:05,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 131 flow [2023-08-30 11:15:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:15:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:15:05,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-08-30 11:15:05,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47715736040609136 [2023-08-30 11:15:05,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-08-30 11:15:05,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-08-30 11:15:05,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:05,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-08-30 11:15:05,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:05,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:05,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:05,509 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 91 flow. Second operand 3 states and 282 transitions. [2023-08-30 11:15:05,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 131 flow [2023-08-30 11:15:05,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:15:05,510 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 82 flow [2023-08-30 11:15:05,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-30 11:15:05,511 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-08-30 11:15:05,511 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 82 flow [2023-08-30 11:15:05,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:05,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:05,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:15:05,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 11:15:05,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:05,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:05,512 INFO L85 PathProgramCache]: Analyzing trace with hash -45806981, now seen corresponding path program 1 times [2023-08-30 11:15:05,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:05,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063115286] [2023-08-30 11:15:05,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:05,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:05,624 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 11:15:05,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:05,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063115286] [2023-08-30 11:15:05,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063115286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:05,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184666497] [2023-08-30 11:15:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:05,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:05,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:05,630 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 11:15:05,633 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 11:15:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:05,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 11:15:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:05,857 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 11:15:05,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:06,002 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 11:15:06,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184666497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:06,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:06,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 11:15:06,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321123208] [2023-08-30 11:15:06,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:06,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 11:15:06,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:06,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 11:15:06,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:15:06,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 197 [2023-08-30 11:15:06,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 83.875) internal successors, (671), 8 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:06,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:06,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 197 [2023-08-30 11:15:06,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:06,332 INFO L130 PetriNetUnfolder]: 2165/3031 cut-off events. [2023-08-30 11:15:06,332 INFO L131 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2023-08-30 11:15:06,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7754 conditions, 3031 events. 2165/3031 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 13315 event pairs, 35 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 7746. Up to 1415 conditions per place. [2023-08-30 11:15:06,344 INFO L137 encePairwiseOnDemand]: 187/197 looper letters, 87 selfloop transitions, 28 changer transitions 0/117 dead transitions. [2023-08-30 11:15:06,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 117 transitions, 575 flow [2023-08-30 11:15:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:15:06,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:15:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 781 transitions. [2023-08-30 11:15:06,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49555837563451777 [2023-08-30 11:15:06,347 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 781 transitions. [2023-08-30 11:15:06,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 781 transitions. [2023-08-30 11:15:06,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:06,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 781 transitions. [2023-08-30 11:15:06,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:06,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:06,352 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:06,352 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 82 flow. Second operand 8 states and 781 transitions. [2023-08-30 11:15:06,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 117 transitions, 575 flow [2023-08-30 11:15:06,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 117 transitions, 574 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:15:06,354 INFO L231 Difference]: Finished difference. Result has 41 places, 50 transitions, 280 flow [2023-08-30 11:15:06,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=280, PETRI_PLACES=41, PETRI_TRANSITIONS=50} [2023-08-30 11:15:06,355 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-30 11:15:06,355 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 50 transitions, 280 flow [2023-08-30 11:15:06,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 83.875) internal successors, (671), 8 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:06,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:06,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:15:06,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 11:15:06,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:06,562 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:06,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:06,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2094255097, now seen corresponding path program 1 times [2023-08-30 11:15:06,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:06,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281010300] [2023-08-30 11:15:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:06,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:06,734 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 11:15:06,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:06,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281010300] [2023-08-30 11:15:06,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281010300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:15:06,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:15:06,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:15:06,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494701774] [2023-08-30 11:15:06,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:15:06,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:15:06,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:15:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:15:06,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 11:15:06,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 50 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 77.5) internal successors, (310), 4 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:06,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:06,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 11:15:06,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:07,002 INFO L130 PetriNetUnfolder]: 2149/3089 cut-off events. [2023-08-30 11:15:07,002 INFO L131 PetriNetUnfolder]: For 2478/2478 co-relation queries the response was YES. [2023-08-30 11:15:07,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9838 conditions, 3089 events. 2149/3089 cut-off events. For 2478/2478 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14213 event pairs, 63 based on Foata normal form. 76/2771 useless extension candidates. Maximal degree in co-relation 9826. Up to 2305 conditions per place. [2023-08-30 11:15:07,017 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 63 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2023-08-30 11:15:07,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 77 transitions, 517 flow [2023-08-30 11:15:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:15:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:15:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2023-08-30 11:15:07,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543147208121827 [2023-08-30 11:15:07,019 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2023-08-30 11:15:07,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2023-08-30 11:15:07,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:07,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2023-08-30 11:15:07,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:07,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:07,022 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:07,022 INFO L175 Difference]: Start difference. First operand has 41 places, 50 transitions, 280 flow. Second operand 4 states and 358 transitions. [2023-08-30 11:15:07,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 77 transitions, 517 flow [2023-08-30 11:15:07,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 498 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 11:15:07,027 INFO L231 Difference]: Finished difference. Result has 45 places, 54 transitions, 360 flow [2023-08-30 11:15:07,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=360, PETRI_PLACES=45, PETRI_TRANSITIONS=54} [2023-08-30 11:15:07,027 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2023-08-30 11:15:07,028 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 54 transitions, 360 flow [2023-08-30 11:15:07,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 4 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:07,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:07,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:15:07,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 11:15:07,028 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:07,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:07,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2094252108, now seen corresponding path program 1 times [2023-08-30 11:15:07,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:07,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689382502] [2023-08-30 11:15:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:07,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:07,122 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 11:15:07,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:07,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689382502] [2023-08-30 11:15:07,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689382502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:07,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963294700] [2023-08-30 11:15:07,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:07,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:07,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:07,124 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 11:15:07,126 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 11:15:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 11:15:07,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:07,354 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 11:15:07,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:07,442 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 11:15:07,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963294700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:07,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:07,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 11:15:07,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338564502] [2023-08-30 11:15:07,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:07,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 11:15:07,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:07,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 11:15:07,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:15:07,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 197 [2023-08-30 11:15:07,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 54 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 84.625) internal successors, (677), 8 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:07,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:07,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 197 [2023-08-30 11:15:07,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:07,897 INFO L130 PetriNetUnfolder]: 2697/3791 cut-off events. [2023-08-30 11:15:07,897 INFO L131 PetriNetUnfolder]: For 7118/7118 co-relation queries the response was YES. [2023-08-30 11:15:07,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12919 conditions, 3791 events. 2697/3791 cut-off events. For 7118/7118 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17168 event pairs, 41 based on Foata normal form. 180/3519 useless extension candidates. Maximal degree in co-relation 12904. Up to 1477 conditions per place. [2023-08-30 11:15:07,912 INFO L137 encePairwiseOnDemand]: 187/197 looper letters, 86 selfloop transitions, 55 changer transitions 0/143 dead transitions. [2023-08-30 11:15:07,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 143 transitions, 1023 flow [2023-08-30 11:15:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:15:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:15:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 768 transitions. [2023-08-30 11:15:07,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4873096446700508 [2023-08-30 11:15:07,915 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 768 transitions. [2023-08-30 11:15:07,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 768 transitions. [2023-08-30 11:15:07,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:07,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 768 transitions. [2023-08-30 11:15:07,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:07,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:07,919 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:07,919 INFO L175 Difference]: Start difference. First operand has 45 places, 54 transitions, 360 flow. Second operand 8 states and 768 transitions. [2023-08-30 11:15:07,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 143 transitions, 1023 flow [2023-08-30 11:15:07,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 143 transitions, 988 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-30 11:15:07,939 INFO L231 Difference]: Finished difference. Result has 53 places, 82 transitions, 716 flow [2023-08-30 11:15:07,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=716, PETRI_PLACES=53, PETRI_TRANSITIONS=82} [2023-08-30 11:15:07,939 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-08-30 11:15:07,940 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 82 transitions, 716 flow [2023-08-30 11:15:07,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 84.625) internal successors, (677), 8 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:07,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:07,940 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-30 11:15:07,957 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 11:15:08,156 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 11:15:08,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:08,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1070822922, now seen corresponding path program 1 times [2023-08-30 11:15:08,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:08,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807161052] [2023-08-30 11:15:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:08,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:08,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:08,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807161052] [2023-08-30 11:15:08,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807161052] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:08,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644541062] [2023-08-30 11:15:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:08,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:08,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:08,309 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 11:15:08,310 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 11:15:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:08,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 11:15:08,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:08,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:08,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644541062] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:08,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:08,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-08-30 11:15:08,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96029409] [2023-08-30 11:15:08,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:08,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 11:15:08,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:08,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 11:15:08,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:15:08,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 197 [2023-08-30 11:15:08,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 82 transitions, 716 flow. Second operand has 12 states, 12 states have (on average 82.75) internal successors, (993), 12 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:08,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:08,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 197 [2023-08-30 11:15:08,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:09,342 INFO L130 PetriNetUnfolder]: 3007/4487 cut-off events. [2023-08-30 11:15:09,343 INFO L131 PetriNetUnfolder]: For 14638/14638 co-relation queries the response was YES. [2023-08-30 11:15:09,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16334 conditions, 4487 events. 3007/4487 cut-off events. For 14638/14638 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23097 event pairs, 65 based on Foata normal form. 446/4931 useless extension candidates. Maximal degree in co-relation 16316. Up to 1279 conditions per place. [2023-08-30 11:15:09,363 INFO L137 encePairwiseOnDemand]: 187/197 looper letters, 139 selfloop transitions, 69 changer transitions 0/210 dead transitions. [2023-08-30 11:15:09,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 210 transitions, 1548 flow [2023-08-30 11:15:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:15:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:15:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1490 transitions. [2023-08-30 11:15:09,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727157360406091 [2023-08-30 11:15:09,367 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1490 transitions. [2023-08-30 11:15:09,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1490 transitions. [2023-08-30 11:15:09,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:09,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1490 transitions. [2023-08-30 11:15:09,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 93.125) internal successors, (1490), 16 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:09,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 197.0) internal successors, (3349), 17 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:09,373 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 197.0) internal successors, (3349), 17 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:09,373 INFO L175 Difference]: Start difference. First operand has 53 places, 82 transitions, 716 flow. Second operand 16 states and 1490 transitions. [2023-08-30 11:15:09,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 210 transitions, 1548 flow [2023-08-30 11:15:09,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 210 transitions, 1406 flow, removed 42 selfloop flow, removed 5 redundant places. [2023-08-30 11:15:09,445 INFO L231 Difference]: Finished difference. Result has 67 places, 96 transitions, 939 flow [2023-08-30 11:15:09,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=939, PETRI_PLACES=67, PETRI_TRANSITIONS=96} [2023-08-30 11:15:09,446 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2023-08-30 11:15:09,446 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 96 transitions, 939 flow [2023-08-30 11:15:09,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.75) internal successors, (993), 12 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:09,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:09,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:15:09,461 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 11:15:09,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:09,651 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:09,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:09,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1763394028, now seen corresponding path program 1 times [2023-08-30 11:15:09,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:09,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573700496] [2023-08-30 11:15:09,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:09,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:09,917 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 11:15:09,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:09,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573700496] [2023-08-30 11:15:09,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573700496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:09,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27100477] [2023-08-30 11:15:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:09,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:09,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:09,919 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 11:15:09,949 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 11:15:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:09,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:15:09,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:10,112 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 11:15:10,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:10,291 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 11:15:10,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27100477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:10,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:10,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-30 11:15:10,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533930892] [2023-08-30 11:15:10,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:10,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 11:15:10,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:10,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 11:15:10,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:15:10,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 197 [2023-08-30 11:15:10,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 96 transitions, 939 flow. Second operand has 12 states, 12 states have (on average 75.0) internal successors, (900), 12 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:10,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:10,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 197 [2023-08-30 11:15:10,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:11,242 INFO L130 PetriNetUnfolder]: 3953/5917 cut-off events. [2023-08-30 11:15:11,242 INFO L131 PetriNetUnfolder]: For 24924/24924 co-relation queries the response was YES. [2023-08-30 11:15:11,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24165 conditions, 5917 events. 3953/5917 cut-off events. For 24924/24924 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31928 event pairs, 313 based on Foata normal form. 100/6009 useless extension candidates. Maximal degree in co-relation 24142. Up to 3417 conditions per place. [2023-08-30 11:15:11,270 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 179 selfloop transitions, 79 changer transitions 0/260 dead transitions. [2023-08-30 11:15:11,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 260 transitions, 2425 flow [2023-08-30 11:15:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:15:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:15:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1194 transitions. [2023-08-30 11:15:11,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43292240754169686 [2023-08-30 11:15:11,274 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1194 transitions. [2023-08-30 11:15:11,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1194 transitions. [2023-08-30 11:15:11,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:11,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1194 transitions. [2023-08-30 11:15:11,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 85.28571428571429) internal successors, (1194), 14 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:11,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 197.0) internal successors, (2955), 15 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:11,279 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 197.0) internal successors, (2955), 15 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:11,279 INFO L175 Difference]: Start difference. First operand has 67 places, 96 transitions, 939 flow. Second operand 14 states and 1194 transitions. [2023-08-30 11:15:11,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 260 transitions, 2425 flow [2023-08-30 11:15:11,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 260 transitions, 2317 flow, removed 50 selfloop flow, removed 3 redundant places. [2023-08-30 11:15:11,360 INFO L231 Difference]: Finished difference. Result has 88 places, 155 transitions, 1864 flow [2023-08-30 11:15:11,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1864, PETRI_PLACES=88, PETRI_TRANSITIONS=155} [2023-08-30 11:15:11,360 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 54 predicate places. [2023-08-30 11:15:11,361 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 155 transitions, 1864 flow [2023-08-30 11:15:11,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 75.0) internal successors, (900), 12 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:11,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:11,361 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1] [2023-08-30 11:15:11,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 11:15:11,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:11,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:11,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:11,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1731336819, now seen corresponding path program 2 times [2023-08-30 11:15:11,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:11,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718703593] [2023-08-30 11:15:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:11,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:15:11,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:11,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718703593] [2023-08-30 11:15:11,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718703593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:11,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012303095] [2023-08-30 11:15:11,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:15:11,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:11,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:11,724 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 11:15:11,726 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 11:15:11,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:15:11,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:15:11,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:15:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:11,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:12,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012303095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:12,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:12,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-30 11:15:12,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792773084] [2023-08-30 11:15:12,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:12,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:15:12,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:12,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:15:12,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:15:12,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 197 [2023-08-30 11:15:12,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 155 transitions, 1864 flow. Second operand has 14 states, 14 states have (on average 82.92857142857143) internal successors, (1161), 14 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:12,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:12,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 197 [2023-08-30 11:15:12,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:13,436 INFO L130 PetriNetUnfolder]: 5437/8197 cut-off events. [2023-08-30 11:15:13,437 INFO L131 PetriNetUnfolder]: For 59174/59174 co-relation queries the response was YES. [2023-08-30 11:15:13,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36940 conditions, 8197 events. 5437/8197 cut-off events. For 59174/59174 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 46728 event pairs, 179 based on Foata normal form. 558/8753 useless extension candidates. Maximal degree in co-relation 36906. Up to 1464 conditions per place. [2023-08-30 11:15:13,482 INFO L137 encePairwiseOnDemand]: 189/197 looper letters, 193 selfloop transitions, 161 changer transitions 7/363 dead transitions. [2023-08-30 11:15:13,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 363 transitions, 3993 flow [2023-08-30 11:15:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:15:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:15:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1580 transitions. [2023-08-30 11:15:13,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47178262167811286 [2023-08-30 11:15:13,485 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1580 transitions. [2023-08-30 11:15:13,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1580 transitions. [2023-08-30 11:15:13,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:13,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1580 transitions. [2023-08-30 11:15:13,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.94117647058823) internal successors, (1580), 17 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:13,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 197.0) internal successors, (3546), 18 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:13,492 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 197.0) internal successors, (3546), 18 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:13,492 INFO L175 Difference]: Start difference. First operand has 88 places, 155 transitions, 1864 flow. Second operand 17 states and 1580 transitions. [2023-08-30 11:15:13,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 363 transitions, 3993 flow [2023-08-30 11:15:13,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 363 transitions, 3675 flow, removed 139 selfloop flow, removed 3 redundant places. [2023-08-30 11:15:13,713 INFO L231 Difference]: Finished difference. Result has 107 places, 216 transitions, 2983 flow [2023-08-30 11:15:13,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2983, PETRI_PLACES=107, PETRI_TRANSITIONS=216} [2023-08-30 11:15:13,714 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 73 predicate places. [2023-08-30 11:15:13,714 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 216 transitions, 2983 flow [2023-08-30 11:15:13,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.92857142857143) internal successors, (1161), 14 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:13,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:13,715 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:15:13,733 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 11:15:13,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:13,920 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:13,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:13,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1474241966, now seen corresponding path program 1 times [2023-08-30 11:15:13,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:13,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979366514] [2023-08-30 11:15:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:13,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:14,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:14,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979366514] [2023-08-30 11:15:14,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979366514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:14,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22150700] [2023-08-30 11:15:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:14,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:14,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:14,115 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 11:15:14,145 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 11:15:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:14,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:15:14,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:14,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:14,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22150700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:14,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:14,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-08-30 11:15:14,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060305043] [2023-08-30 11:15:14,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:14,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 11:15:14,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:14,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 11:15:14,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2023-08-30 11:15:14,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 11:15:14,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 216 transitions, 2983 flow. Second operand has 19 states, 19 states have (on average 77.57894736842105) internal successors, (1474), 19 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:14,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:14,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 11:15:14,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:17,265 INFO L130 PetriNetUnfolder]: 9901/14819 cut-off events. [2023-08-30 11:15:17,266 INFO L131 PetriNetUnfolder]: For 150170/150170 co-relation queries the response was YES. [2023-08-30 11:15:17,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72758 conditions, 14819 events. 9901/14819 cut-off events. For 150170/150170 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 90561 event pairs, 127 based on Foata normal form. 954/15771 useless extension candidates. Maximal degree in co-relation 72718. Up to 2715 conditions per place. [2023-08-30 11:15:17,427 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 307 selfloop transitions, 412 changer transitions 10/731 dead transitions. [2023-08-30 11:15:17,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 731 transitions, 9035 flow [2023-08-30 11:15:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 11:15:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 11:15:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3011 transitions. [2023-08-30 11:15:17,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44953717527620185 [2023-08-30 11:15:17,434 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3011 transitions. [2023-08-30 11:15:17,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3011 transitions. [2023-08-30 11:15:17,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:17,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3011 transitions. [2023-08-30 11:15:17,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 88.55882352941177) internal successors, (3011), 34 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:17,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 197.0) internal successors, (6895), 35 states have internal predecessors, (6895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:17,446 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 197.0) internal successors, (6895), 35 states have internal predecessors, (6895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:17,446 INFO L175 Difference]: Start difference. First operand has 107 places, 216 transitions, 2983 flow. Second operand 34 states and 3011 transitions. [2023-08-30 11:15:17,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 731 transitions, 9035 flow [2023-08-30 11:15:18,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 731 transitions, 8315 flow, removed 243 selfloop flow, removed 8 redundant places. [2023-08-30 11:15:18,211 INFO L231 Difference]: Finished difference. Result has 143 places, 466 transitions, 7293 flow [2023-08-30 11:15:18,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7293, PETRI_PLACES=143, PETRI_TRANSITIONS=466} [2023-08-30 11:15:18,212 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 109 predicate places. [2023-08-30 11:15:18,212 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 466 transitions, 7293 flow [2023-08-30 11:15:18,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.57894736842105) internal successors, (1474), 19 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:18,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:18,213 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:15:18,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 11:15:18,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:18,419 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:18,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:18,420 INFO L85 PathProgramCache]: Analyzing trace with hash -350204012, now seen corresponding path program 1 times [2023-08-30 11:15:18,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:18,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544636595] [2023-08-30 11:15:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:18,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:18,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:18,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544636595] [2023-08-30 11:15:18,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544636595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:18,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589853370] [2023-08-30 11:15:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:18,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:18,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:18,634 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 11:15:18,649 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 11:15:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:18,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 11:15:18,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:18,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:19,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589853370] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:19,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:19,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2023-08-30 11:15:19,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942046847] [2023-08-30 11:15:19,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:19,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 11:15:19,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:19,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 11:15:19,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:15:19,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 197 [2023-08-30 11:15:19,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 466 transitions, 7293 flow. Second operand has 15 states, 15 states have (on average 78.73333333333333) internal successors, (1181), 15 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:19,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:19,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 197 [2023-08-30 11:15:19,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:21,616 INFO L130 PetriNetUnfolder]: 11063/16757 cut-off events. [2023-08-30 11:15:21,617 INFO L131 PetriNetUnfolder]: For 200538/200538 co-relation queries the response was YES. [2023-08-30 11:15:21,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86750 conditions, 16757 events. 11063/16757 cut-off events. For 200538/200538 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 107193 event pairs, 679 based on Foata normal form. 1168/17923 useless extension candidates. Maximal degree in co-relation 86702. Up to 5946 conditions per place. [2023-08-30 11:15:21,717 INFO L137 encePairwiseOnDemand]: 189/197 looper letters, 247 selfloop transitions, 337 changer transitions 22/608 dead transitions. [2023-08-30 11:15:21,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 608 transitions, 9801 flow [2023-08-30 11:15:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:15:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:15:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1061 transitions. [2023-08-30 11:15:21,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488155668358714 [2023-08-30 11:15:21,719 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1061 transitions. [2023-08-30 11:15:21,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1061 transitions. [2023-08-30 11:15:21,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:21,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1061 transitions. [2023-08-30 11:15:21,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 88.41666666666667) internal successors, (1061), 12 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:21,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:21,724 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:21,724 INFO L175 Difference]: Start difference. First operand has 143 places, 466 transitions, 7293 flow. Second operand 12 states and 1061 transitions. [2023-08-30 11:15:21,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 608 transitions, 9801 flow [2023-08-30 11:15:22,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 608 transitions, 8305 flow, removed 667 selfloop flow, removed 7 redundant places. [2023-08-30 11:15:22,974 INFO L231 Difference]: Finished difference. Result has 153 places, 513 transitions, 7775 flow [2023-08-30 11:15:22,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7775, PETRI_PLACES=153, PETRI_TRANSITIONS=513} [2023-08-30 11:15:22,975 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 119 predicate places. [2023-08-30 11:15:22,975 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 513 transitions, 7775 flow [2023-08-30 11:15:22,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.73333333333333) internal successors, (1181), 15 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:22,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:22,976 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:15:22,983 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 11:15:23,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:23,180 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:23,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1890407148, now seen corresponding path program 2 times [2023-08-30 11:15:23,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:23,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650537337] [2023-08-30 11:15:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:23,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:23,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:23,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650537337] [2023-08-30 11:15:23,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650537337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:23,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508427272] [2023-08-30 11:15:23,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:15:23,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:23,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:23,386 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 11:15:23,432 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 11:15:23,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:15:23,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:15:23,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 11:15:23,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:23,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:24,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508427272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:24,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:24,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 11:15:24,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10910504] [2023-08-30 11:15:24,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:24,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:15:24,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:24,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:15:24,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:15:24,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 197 [2023-08-30 11:15:24,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 513 transitions, 7775 flow. Second operand has 14 states, 14 states have (on average 80.14285714285714) internal successors, (1122), 14 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:24,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:24,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 197 [2023-08-30 11:15:24,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:27,539 INFO L130 PetriNetUnfolder]: 13555/20411 cut-off events. [2023-08-30 11:15:27,539 INFO L131 PetriNetUnfolder]: For 189894/189894 co-relation queries the response was YES. [2023-08-30 11:15:27,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103407 conditions, 20411 events. 13555/20411 cut-off events. For 189894/189894 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 131862 event pairs, 767 based on Foata normal form. 262/20671 useless extension candidates. Maximal degree in co-relation 103358. Up to 10943 conditions per place. [2023-08-30 11:15:27,695 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 394 selfloop transitions, 372 changer transitions 18/786 dead transitions. [2023-08-30 11:15:27,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 786 transitions, 12036 flow [2023-08-30 11:15:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:15:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:15:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1447 transitions. [2023-08-30 11:15:27,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590736040609137 [2023-08-30 11:15:27,698 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1447 transitions. [2023-08-30 11:15:27,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1447 transitions. [2023-08-30 11:15:27,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:27,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1447 transitions. [2023-08-30 11:15:27,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 90.4375) internal successors, (1447), 16 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:27,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 197.0) internal successors, (3349), 17 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:27,706 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 197.0) internal successors, (3349), 17 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:27,706 INFO L175 Difference]: Start difference. First operand has 153 places, 513 transitions, 7775 flow. Second operand 16 states and 1447 transitions. [2023-08-30 11:15:27,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 786 transitions, 12036 flow [2023-08-30 11:15:30,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 786 transitions, 11793 flow, removed 118 selfloop flow, removed 3 redundant places. [2023-08-30 11:15:30,264 INFO L231 Difference]: Finished difference. Result has 172 places, 644 transitions, 11060 flow [2023-08-30 11:15:30,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=7512, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11060, PETRI_PLACES=172, PETRI_TRANSITIONS=644} [2023-08-30 11:15:30,265 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 138 predicate places. [2023-08-30 11:15:30,265 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 644 transitions, 11060 flow [2023-08-30 11:15:30,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 80.14285714285714) internal successors, (1122), 14 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:30,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:30,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:15:30,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 11:15:30,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 11:15:30,471 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:30,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:30,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1543992597, now seen corresponding path program 1 times [2023-08-30 11:15:30,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:30,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163133869] [2023-08-30 11:15:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:30,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:30,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163133869] [2023-08-30 11:15:30,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163133869] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:30,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35841937] [2023-08-30 11:15:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:30,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:30,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:30,749 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:15:30,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 11:15:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:30,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 11:15:30,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:31,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:31,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35841937] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:31,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:31,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 11:15:31,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802776937] [2023-08-30 11:15:31,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:31,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 11:15:31,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:31,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 11:15:31,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2023-08-30 11:15:32,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 11:15:32,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 644 transitions, 11060 flow. Second operand has 22 states, 22 states have (on average 77.63636363636364) internal successors, (1708), 22 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:32,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:32,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 11:15:32,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:43,207 INFO L130 PetriNetUnfolder]: 28973/43331 cut-off events. [2023-08-30 11:15:43,208 INFO L131 PetriNetUnfolder]: For 453510/453510 co-relation queries the response was YES. [2023-08-30 11:15:43,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221983 conditions, 43331 events. 28973/43331 cut-off events. For 453510/453510 co-relation queries the response was YES. Maximal size of possible extension queue 1967. Compared 309885 event pairs, 397 based on Foata normal form. 1916/45245 useless extension candidates. Maximal degree in co-relation 221928. Up to 5224 conditions per place. [2023-08-30 11:15:43,490 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 454 selfloop transitions, 1415 changer transitions 85/1956 dead transitions. [2023-08-30 11:15:43,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 1956 transitions, 30167 flow [2023-08-30 11:15:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-30 11:15:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-30 11:15:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5828 transitions. [2023-08-30 11:15:43,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44154860216683084 [2023-08-30 11:15:43,501 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5828 transitions. [2023-08-30 11:15:43,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5828 transitions. [2023-08-30 11:15:43,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:43,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5828 transitions. [2023-08-30 11:15:43,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 86.98507462686567) internal successors, (5828), 67 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:43,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 197.0) internal successors, (13396), 68 states have internal predecessors, (13396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:43,520 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 197.0) internal successors, (13396), 68 states have internal predecessors, (13396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:43,521 INFO L175 Difference]: Start difference. First operand has 172 places, 644 transitions, 11060 flow. Second operand 67 states and 5828 transitions. [2023-08-30 11:15:43,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 1956 transitions, 30167 flow [2023-08-30 11:15:52,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1956 transitions, 29991 flow, removed 81 selfloop flow, removed 4 redundant places. [2023-08-30 11:15:52,667 INFO L231 Difference]: Finished difference. Result has 241 places, 1501 transitions, 28392 flow [2023-08-30 11:15:52,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=10619, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=28392, PETRI_PLACES=241, PETRI_TRANSITIONS=1501} [2023-08-30 11:15:52,668 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 207 predicate places. [2023-08-30 11:15:52,669 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 1501 transitions, 28392 flow [2023-08-30 11:15:52,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 77.63636363636364) internal successors, (1708), 22 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:52,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:52,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:15:52,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 11:15:52,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:52,873 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:15:52,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:52,874 INFO L85 PathProgramCache]: Analyzing trace with hash -303418250, now seen corresponding path program 2 times [2023-08-30 11:15:52,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:52,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914153762] [2023-08-30 11:15:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:52,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:53,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:53,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914153762] [2023-08-30 11:15:53,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914153762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:53,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100779589] [2023-08-30 11:15:53,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:15:53,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:53,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:53,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:15:53,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 11:15:53,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:15:53,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:15:53,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:15:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:53,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:53,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100779589] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:53,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:53,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 11:15:53,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447771712] [2023-08-30 11:15:53,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:53,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 11:15:53,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:53,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 11:15:53,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-08-30 11:15:54,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 11:15:54,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 1501 transitions, 28392 flow. Second operand has 22 states, 22 states have (on average 77.63636363636364) internal successors, (1708), 22 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:54,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:54,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 11:15:54,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:16,508 INFO L130 PetriNetUnfolder]: 55441/81771 cut-off events. [2023-08-30 11:16:16,509 INFO L131 PetriNetUnfolder]: For 912050/912050 co-relation queries the response was YES. [2023-08-30 11:16:17,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467989 conditions, 81771 events. 55441/81771 cut-off events. For 912050/912050 co-relation queries the response was YES. Maximal size of possible extension queue 3688. Compared 616059 event pairs, 1395 based on Foata normal form. 786/82555 useless extension candidates. Maximal degree in co-relation 467926. Up to 11135 conditions per place. [2023-08-30 11:16:17,307 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 533 selfloop transitions, 3016 changer transitions 42/3593 dead transitions. [2023-08-30 11:16:17,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 3593 transitions, 68633 flow [2023-08-30 11:16:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-30 11:16:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-30 11:16:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 5118 transitions. [2023-08-30 11:16:17,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44033382087240813 [2023-08-30 11:16:17,312 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 5118 transitions. [2023-08-30 11:16:17,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 5118 transitions. [2023-08-30 11:16:17,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:17,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 5118 transitions. [2023-08-30 11:16:17,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 86.7457627118644) internal successors, (5118), 59 states have internal predecessors, (5118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:17,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 197.0) internal successors, (11820), 60 states have internal predecessors, (11820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:17,327 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 197.0) internal successors, (11820), 60 states have internal predecessors, (11820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:17,327 INFO L175 Difference]: Start difference. First operand has 241 places, 1501 transitions, 28392 flow. Second operand 59 states and 5118 transitions. [2023-08-30 11:16:17,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 3593 transitions, 68633 flow [2023-08-30 11:17:09,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 3593 transitions, 63586 flow, removed 2289 selfloop flow, removed 6 redundant places. [2023-08-30 11:17:09,260 INFO L231 Difference]: Finished difference. Result has 300 places, 3182 transitions, 62644 flow [2023-08-30 11:17:09,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=26151, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=62644, PETRI_PLACES=300, PETRI_TRANSITIONS=3182} [2023-08-30 11:17:09,263 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 266 predicate places. [2023-08-30 11:17:09,263 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 3182 transitions, 62644 flow [2023-08-30 11:17:09,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 77.63636363636364) internal successors, (1708), 22 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:09,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:17:09,264 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:17:09,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 11:17:09,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 11:17:09,468 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:17:09,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:17:09,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1929491086, now seen corresponding path program 2 times [2023-08-30 11:17:09,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:17:09,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125051642] [2023-08-30 11:17:09,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:09,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:17:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:09,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:17:09,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125051642] [2023-08-30 11:17:09,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125051642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:17:09,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825621123] [2023-08-30 11:17:09,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:17:09,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:09,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:17:09,692 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:17:09,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 11:17:09,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:17:09,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:17:09,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:17:09,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:17:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:09,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:17:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:10,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825621123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:17:10,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:17:10,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-08-30 11:17:10,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049149611] [2023-08-30 11:17:10,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:17:10,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:17:10,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:17:10,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:17:10,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-08-30 11:17:10,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 11:17:10,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 3182 transitions, 62644 flow. Second operand has 20 states, 20 states have (on average 77.8) internal successors, (1556), 20 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:10,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:17:10,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 11:17:10,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:47,234 INFO L130 PetriNetUnfolder]: 62629/92343 cut-off events. [2023-08-30 11:17:47,235 INFO L131 PetriNetUnfolder]: For 994460/994460 co-relation queries the response was YES. [2023-08-30 11:17:48,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530389 conditions, 92343 events. 62629/92343 cut-off events. For 994460/994460 co-relation queries the response was YES. Maximal size of possible extension queue 4250. Compared 706552 event pairs, 4387 based on Foata normal form. 1592/93933 useless extension candidates. Maximal degree in co-relation 530320. Up to 31082 conditions per place. [2023-08-30 11:17:48,418 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 455 selfloop transitions, 3382 changer transitions 38/3877 dead transitions. [2023-08-30 11:17:48,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 3877 transitions, 79990 flow [2023-08-30 11:17:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 11:17:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 11:17:48,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2435 transitions. [2023-08-30 11:17:48,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44144307469180566 [2023-08-30 11:17:48,437 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2435 transitions. [2023-08-30 11:17:48,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2435 transitions. [2023-08-30 11:17:48,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:17:48,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2435 transitions. [2023-08-30 11:17:48,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 86.96428571428571) internal successors, (2435), 28 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:48,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 197.0) internal successors, (5713), 29 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:48,464 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 197.0) internal successors, (5713), 29 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:48,464 INFO L175 Difference]: Start difference. First operand has 300 places, 3182 transitions, 62644 flow. Second operand 28 states and 2435 transitions. [2023-08-30 11:17:48,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 3877 transitions, 79990 flow [2023-08-30 11:18:47,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 3877 transitions, 77220 flow, removed 1184 selfloop flow, removed 8 redundant places. [2023-08-30 11:18:47,847 INFO L231 Difference]: Finished difference. Result has 323 places, 3675 transitions, 78642 flow [2023-08-30 11:18:47,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=56989, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2754, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=78642, PETRI_PLACES=323, PETRI_TRANSITIONS=3675} [2023-08-30 11:18:47,850 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 289 predicate places. [2023-08-30 11:18:47,850 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 3675 transitions, 78642 flow [2023-08-30 11:18:47,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 77.8) internal successors, (1556), 20 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:47,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:18:47,851 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:18:47,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 11:18:48,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 11:18:48,056 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:18:48,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:18:48,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1929457606, now seen corresponding path program 3 times [2023-08-30 11:18:48,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:18:48,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551012079] [2023-08-30 11:18:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:18:48,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:18:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:18:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:48,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:18:48,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551012079] [2023-08-30 11:18:48,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551012079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:18:48,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217437889] [2023-08-30 11:18:48,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:18:48,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:18:48,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:18:48,357 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:18:48,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 11:18:48,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 11:18:48,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:18:48,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:18:48,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:18:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:48,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:18:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:49,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217437889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:18:49,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:18:49,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 11:18:49,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302455763] [2023-08-30 11:18:49,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:18:49,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 11:18:49,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:18:49,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 11:18:49,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-08-30 11:18:49,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 11:18:49,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 3675 transitions, 78642 flow. Second operand has 21 states, 21 states have (on average 77.52380952380952) internal successors, (1628), 21 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:49,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:18:49,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 11:18:49,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:19:52,461 INFO L130 PetriNetUnfolder]: 81507/119767 cut-off events. [2023-08-30 11:19:52,477 INFO L131 PetriNetUnfolder]: For 1408722/1408722 co-relation queries the response was YES. [2023-08-30 11:19:53,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734545 conditions, 119767 events. 81507/119767 cut-off events. For 1408722/1408722 co-relation queries the response was YES. Maximal size of possible extension queue 5536. Compared 939666 event pairs, 3963 based on Foata normal form. 1788/121553 useless extension candidates. Maximal degree in co-relation 734472. Up to 23612 conditions per place. [2023-08-30 11:19:53,949 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 778 selfloop transitions, 4241 changer transitions 44/5065 dead transitions. [2023-08-30 11:19:53,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 5065 transitions, 114571 flow [2023-08-30 11:19:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 11:19:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 11:19:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2694 transitions. [2023-08-30 11:19:53,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411331259210742 [2023-08-30 11:19:53,952 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2694 transitions. [2023-08-30 11:19:53,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2694 transitions. [2023-08-30 11:19:53,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:19:53,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2694 transitions. [2023-08-30 11:19:53,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 86.90322580645162) internal successors, (2694), 31 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:53,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 197.0) internal successors, (6304), 32 states have internal predecessors, (6304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:53,959 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 197.0) internal successors, (6304), 32 states have internal predecessors, (6304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:53,959 INFO L175 Difference]: Start difference. First operand has 323 places, 3675 transitions, 78642 flow. Second operand 31 states and 2694 transitions. [2023-08-30 11:19:53,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 5065 transitions, 114571 flow [2023-08-30 11:22:26,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 5065 transitions, 114008 flow, removed 248 selfloop flow, removed 9 redundant places. [2023-08-30 11:22:26,501 INFO L231 Difference]: Finished difference. Result has 358 places, 4844 transitions, 119868 flow [2023-08-30 11:22:26,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=76476, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3068, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=119868, PETRI_PLACES=358, PETRI_TRANSITIONS=4844} [2023-08-30 11:22:26,504 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 324 predicate places. [2023-08-30 11:22:26,504 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 4844 transitions, 119868 flow [2023-08-30 11:22:26,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.52380952380952) internal successors, (1628), 21 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:22:26,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:22:26,505 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:22:26,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 11:22:26,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 11:22:26,713 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:22:26,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:22:26,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1034135572, now seen corresponding path program 1 times [2023-08-30 11:22:26,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:22:26,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837854488] [2023-08-30 11:22:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:22:26,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:22:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:22:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:22:27,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:22:27,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837854488] [2023-08-30 11:22:27,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837854488] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:22:27,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422679104] [2023-08-30 11:22:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:22:27,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:22:27,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:22:27,071 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:22:27,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 11:22:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:22:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 11:22:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:22:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:22:27,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:22:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:22:27,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422679104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:22:27,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:22:27,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-08-30 11:22:27,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319636036] [2023-08-30 11:22:27,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:22:27,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 11:22:27,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:22:27,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 11:22:27,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-08-30 11:22:27,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 11:22:27,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 4844 transitions, 119868 flow. Second operand has 23 states, 23 states have (on average 77.56521739130434) internal successors, (1784), 23 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:22:27,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:22:27,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 11:22:27,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:24:18,956 INFO L130 PetriNetUnfolder]: 95533/140441 cut-off events. [2023-08-30 11:24:18,972 INFO L131 PetriNetUnfolder]: For 2121146/2121146 co-relation queries the response was YES. [2023-08-30 11:24:20,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963673 conditions, 140441 events. 95533/140441 cut-off events. For 2121146/2121146 co-relation queries the response was YES. Maximal size of possible extension queue 6516. Compared 1125764 event pairs, 8111 based on Foata normal form. 1270/141709 useless extension candidates. Maximal degree in co-relation 963586. Up to 57922 conditions per place. [2023-08-30 11:24:21,087 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 600 selfloop transitions, 5511 changer transitions 77/6190 dead transitions. [2023-08-30 11:24:21,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 6190 transitions, 155413 flow [2023-08-30 11:24:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-30 11:24:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-30 11:24:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5579 transitions. [2023-08-30 11:24:21,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43568918391253414 [2023-08-30 11:24:21,115 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5579 transitions. [2023-08-30 11:24:21,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5579 transitions. [2023-08-30 11:24:21,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:24:21,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5579 transitions. [2023-08-30 11:24:21,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 85.83076923076923) internal successors, (5579), 65 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:24:21,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 197.0) internal successors, (13002), 66 states have internal predecessors, (13002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:24:21,145 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 197.0) internal successors, (13002), 66 states have internal predecessors, (13002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:24:21,145 INFO L175 Difference]: Start difference. First operand has 358 places, 4844 transitions, 119868 flow. Second operand 65 states and 5579 transitions. [2023-08-30 11:24:21,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 6190 transitions, 155413 flow [2023-08-30 11:28:44,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 6190 transitions, 154998 flow, removed 175 selfloop flow, removed 4 redundant places. [2023-08-30 11:28:44,220 INFO L231 Difference]: Finished difference. Result has 428 places, 5783 transitions, 155888 flow [2023-08-30 11:28:44,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=118565, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4562, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=155888, PETRI_PLACES=428, PETRI_TRANSITIONS=5783} [2023-08-30 11:28:44,224 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 394 predicate places. [2023-08-30 11:28:44,224 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 5783 transitions, 155888 flow [2023-08-30 11:28:44,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 77.56521739130434) internal successors, (1784), 23 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:44,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:28:44,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:28:44,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 11:28:44,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 11:28:44,430 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-30 11:28:44,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:28:44,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1571991217, now seen corresponding path program 2 times [2023-08-30 11:28:44,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:28:44,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112944671] [2023-08-30 11:28:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:28:44,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:28:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:28:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:44,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:28:44,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112944671] [2023-08-30 11:28:44,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112944671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:28:44,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518438794] [2023-08-30 11:28:44,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:28:44,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:28:44,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:28:44,672 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:28:44,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 11:28:44,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:28:44,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:28:44,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:28:44,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:28:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:44,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:28:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:28:45,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518438794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:28:45,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:28:45,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-08-30 11:28:45,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918541715] [2023-08-30 11:28:45,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:28:45,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 11:28:45,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:28:45,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 11:28:45,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2023-08-30 11:28:45,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 11:28:45,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 5783 transitions, 155888 flow. Second operand has 21 states, 21 states have (on average 77.71428571428571) internal successors, (1632), 21 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:28:45,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:28:45,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 11:28:45,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15