./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 08:23:19,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:23:19,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:23:19,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:23:19,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:23:19,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:23:19,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:23:19,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:23:19,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:23:19,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:23:19,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:23:19,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:23:19,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:23:19,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:23:19,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:23:19,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:23:19,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:23:19,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:23:19,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:23:19,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:23:19,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:23:19,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:23:19,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:23:19,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:23:19,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:23:19,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:23:19,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:23:19,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:23:19,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:23:19,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:23:19,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:23:19,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:23:19,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:23:19,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:23:19,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:23:19,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:23:19,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:23:19,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:23:19,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:23:19,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:23:19,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:23:19,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 08:23:20,016 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:23:20,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:23:20,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:23:20,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:23:20,019 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:23:20,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:23:20,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:23:20,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:23:20,020 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:23:20,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:23:20,021 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:23:20,021 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 08:23:20,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:23:20,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:23:20,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:23:20,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:23:20,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:23:20,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:23:20,022 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 08:23:20,023 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:23:20,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:23:20,023 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:23:20,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:23:20,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:23:20,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:23:20,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:23:20,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:23:20,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:23:20,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:23:20,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:23:20,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:23:20,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:23:20,025 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:23:20,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:23:20,026 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:23:20,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:23:20,026 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:23:20,026 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:23:20,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:23:20,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:23:20,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:23:20,356 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:23:20,357 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:23:20,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-09-01 08:23:21,564 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:23:21,752 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:23:21,753 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-09-01 08:23:21,779 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba6892117/12ea60c5064d4f8f963014fc87599d67/FLAG3f98a6a14 [2023-09-01 08:23:21,797 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba6892117/12ea60c5064d4f8f963014fc87599d67 [2023-09-01 08:23:21,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:23:21,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:23:21,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:23:21,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:23:21,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:23:21,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:23:21" (1/1) ... [2023-09-01 08:23:21,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@930eee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:21, skipping insertion in model container [2023-09-01 08:23:21,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:23:21" (1/1) ... [2023-09-01 08:23:21,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:23:21,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:23:21,979 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-09-01 08:23:21,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:23:21,996 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:23:22,029 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-09-01 08:23:22,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:23:22,041 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:23:22,042 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:23:22,047 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:23:22,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22 WrapperNode [2023-09-01 08:23:22,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:23:22,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:23:22,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:23:22,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:23:22,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22" (1/1) ... [2023-09-01 08:23:22,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22" (1/1) ... [2023-09-01 08:23:22,093 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 180 [2023-09-01 08:23:22,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:23:22,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:23:22,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:23:22,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:23:22,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22" (1/1) ... [2023-09-01 08:23:22,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22" (1/1) ... [2023-09-01 08:23:22,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22" (1/1) ... [2023-09-01 08:23:22,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22" (1/1) ... [2023-09-01 08:23:22,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22" (1/1) ... [2023-09-01 08:23:22,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22" (1/1) ... [2023-09-01 08:23:22,145 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22" (1/1) ... [2023-09-01 08:23:22,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22" (1/1) ... [2023-09-01 08:23:22,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:23:22,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:23:22,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:23:22,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:23:22,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22" (1/1) ... [2023-09-01 08:23:22,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:23:22,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:22,183 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) [2023-09-01 08:23:22,214 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 [2023-09-01 08:23:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:23:22,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:23:22,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:23:22,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:23:22,236 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 08:23:22,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 08:23:22,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 08:23:22,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 08:23:22,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 08:23:22,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 08:23:22,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:23:22,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 08:23:22,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 08:23:22,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 08:23:22,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:23:22,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:23:22,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:23:22,240 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 08:23:22,325 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:23:22,327 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:23:22,641 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:23:22,752 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:23:22,752 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 08:23:22,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:23:22 BoogieIcfgContainer [2023-09-01 08:23:22,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:23:22,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:23:22,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:23:22,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:23:22,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:23:21" (1/3) ... [2023-09-01 08:23:22,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23bf27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:23:22, skipping insertion in model container [2023-09-01 08:23:22,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:23:22" (2/3) ... [2023-09-01 08:23:22,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23bf27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:23:22, skipping insertion in model container [2023-09-01 08:23:22,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:23:22" (3/3) ... [2023-09-01 08:23:22,764 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-09-01 08:23:22,771 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:23:22,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:23:22,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 08:23:22,779 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:23:22,858 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 08:23:22,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 160 transitions, 344 flow [2023-09-01 08:23:22,966 INFO L130 PetriNetUnfolder]: 11/157 cut-off events. [2023-09-01 08:23:22,967 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 08:23:22,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 157 events. 11/157 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 147 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 130. Up to 3 conditions per place. [2023-09-01 08:23:22,972 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 160 transitions, 344 flow [2023-09-01 08:23:22,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 136 transitions, 284 flow [2023-09-01 08:23:22,982 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:23:22,995 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 136 transitions, 284 flow [2023-09-01 08:23:22,999 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 136 transitions, 284 flow [2023-09-01 08:23:22,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 136 transitions, 284 flow [2023-09-01 08:23:23,044 INFO L130 PetriNetUnfolder]: 10/136 cut-off events. [2023-09-01 08:23:23,044 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 08:23:23,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 136 events. 10/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 130. Up to 3 conditions per place. [2023-09-01 08:23:23,048 INFO L119 LiptonReduction]: Number of co-enabled transitions 1672 [2023-09-01 08:23:27,604 INFO L134 LiptonReduction]: Checked pairs total: 3726 [2023-09-01 08:23:27,604 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-09-01 08:23:27,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:23:27,626 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;@3b9220b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:23:27,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-09-01 08:23:27,630 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 08:23:27,630 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:23:27,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:27,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 08:23:27,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:27,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:27,638 INFO L85 PathProgramCache]: Analyzing trace with hash 21239, now seen corresponding path program 1 times [2023-09-01 08:23:27,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:27,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925972579] [2023-09-01 08:23:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:27,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:27,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:27,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925972579] [2023-09-01 08:23:27,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925972579] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:23:27,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:23:27,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:23:27,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703744705] [2023-09-01 08:23:27,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:23:27,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:23:27,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:27,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:23:27,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:23:27,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 299 [2023-09-01 08:23:27,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:27,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:27,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 299 [2023-09-01 08:23:27,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:28,114 INFO L130 PetriNetUnfolder]: 1559/2329 cut-off events. [2023-09-01 08:23:28,115 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2023-09-01 08:23:28,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4865 conditions, 2329 events. 1559/2329 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 11415 event pairs, 1276 based on Foata normal form. 0/1459 useless extension candidates. Maximal degree in co-relation 2251. Up to 1124 conditions per place. [2023-09-01 08:23:28,126 INFO L137 encePairwiseOnDemand]: 293/299 looper letters, 49 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-09-01 08:23:28,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 232 flow [2023-09-01 08:23:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:23:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:23:28,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-09-01 08:23:28,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150501672240803 [2023-09-01 08:23:28,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-09-01 08:23:28,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-09-01 08:23:28,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:28,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-09-01 08:23:28,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:28,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:28,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:28,163 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 74 flow. Second operand 3 states and 462 transitions. [2023-09-01 08:23:28,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 232 flow [2023-09-01 08:23:28,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 08:23:28,169 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 78 flow [2023-09-01 08:23:28,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-09-01 08:23:28,173 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-09-01 08:23:28,173 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 78 flow [2023-09-01 08:23:28,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:28,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:28,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 08:23:28,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:23:28,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:28,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:28,175 INFO L85 PathProgramCache]: Analyzing trace with hash 659002, now seen corresponding path program 1 times [2023-09-01 08:23:28,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:28,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926189755] [2023-09-01 08:23:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:28,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:28,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:28,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926189755] [2023-09-01 08:23:28,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926189755] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:28,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105253747] [2023-09-01 08:23:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:28,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:28,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:28,237 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) [2023-09-01 08:23:28,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 08:23:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:28,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:23:28,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:28,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:23:28,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105253747] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:23:28,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:23:28,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-09-01 08:23:28,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469916476] [2023-09-01 08:23:28,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:23:28,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:23:28,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:28,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:23:28,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 08:23:28,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 299 [2023-09-01 08:23:28,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:28,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:28,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 299 [2023-09-01 08:23:28,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:28,631 INFO L130 PetriNetUnfolder]: 1559/2328 cut-off events. [2023-09-01 08:23:28,631 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 08:23:28,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4833 conditions, 2328 events. 1559/2328 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 11328 event pairs, 1276 based on Foata normal form. 0/1461 useless extension candidates. Maximal degree in co-relation 2414. Up to 1122 conditions per place. [2023-09-01 08:23:28,641 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 48 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-09-01 08:23:28,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 52 transitions, 226 flow [2023-09-01 08:23:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:23:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:23:28,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2023-09-01 08:23:28,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49414715719063546 [2023-09-01 08:23:28,644 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2023-09-01 08:23:28,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2023-09-01 08:23:28,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:28,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2023-09-01 08:23:28,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:28,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:28,650 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:28,650 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 78 flow. Second operand 4 states and 591 transitions. [2023-09-01 08:23:28,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 52 transitions, 226 flow [2023-09-01 08:23:28,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 52 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:23:28,652 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 76 flow [2023-09-01 08:23:28,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-09-01 08:23:28,653 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-09-01 08:23:28,653 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 76 flow [2023-09-01 08:23:28,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:28,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:28,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 08:23:28,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 08:23:28,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:28,859 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:28,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:28,859 INFO L85 PathProgramCache]: Analyzing trace with hash 659000, now seen corresponding path program 1 times [2023-09-01 08:23:28,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:28,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658243124] [2023-09-01 08:23:28,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:28,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:28,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:28,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658243124] [2023-09-01 08:23:28,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658243124] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:28,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977310598] [2023-09-01 08:23:28,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:28,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:28,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:28,901 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) [2023-09-01 08:23:28,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 08:23:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:28,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:23:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:29,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:23:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:29,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977310598] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:23:29,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:23:29,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:23:29,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550050364] [2023-09-01 08:23:29,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:23:29,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:23:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:29,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:23:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:23:29,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 299 [2023-09-01 08:23:29,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:29,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:29,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 299 [2023-09-01 08:23:29,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:29,568 INFO L130 PetriNetUnfolder]: 3896/5817 cut-off events. [2023-09-01 08:23:29,568 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 08:23:29,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12067 conditions, 5817 events. 3896/5817 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 32355 event pairs, 3190 based on Foata normal form. 0/3651 useless extension candidates. Maximal degree in co-relation 9647. Up to 1123 conditions per place. [2023-09-01 08:23:29,594 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 117 selfloop transitions, 5 changer transitions 0/124 dead transitions. [2023-09-01 08:23:29,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 124 transitions, 540 flow [2023-09-01 08:23:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:23:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:23:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 935 transitions. [2023-09-01 08:23:29,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211817168338907 [2023-09-01 08:23:29,596 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 935 transitions. [2023-09-01 08:23:29,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 935 transitions. [2023-09-01 08:23:29,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:29,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 935 transitions. [2023-09-01 08:23:29,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.83333333333334) internal successors, (935), 6 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:29,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:29,601 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:29,601 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 76 flow. Second operand 6 states and 935 transitions. [2023-09-01 08:23:29,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 124 transitions, 540 flow [2023-09-01 08:23:29,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 124 transitions, 537 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:23:29,603 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 109 flow [2023-09-01 08:23:29,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=109, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-09-01 08:23:29,604 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-09-01 08:23:29,604 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 109 flow [2023-09-01 08:23:29,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:29,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:29,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 08:23:29,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 08:23:29,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 08:23:29,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:29,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:29,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1838721127, now seen corresponding path program 1 times [2023-09-01 08:23:29,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:29,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761522285] [2023-09-01 08:23:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:29,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:29,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:29,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761522285] [2023-09-01 08:23:29,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761522285] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:23:29,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:23:29,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:23:29,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639574167] [2023-09-01 08:23:29,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:23:29,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:23:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:23:29,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:23:29,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 299 [2023-09-01 08:23:29,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:29,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:29,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 299 [2023-09-01 08:23:29,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:30,262 INFO L130 PetriNetUnfolder]: 3076/4747 cut-off events. [2023-09-01 08:23:30,262 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 08:23:30,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9976 conditions, 4747 events. 3076/4747 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27333 event pairs, 1355 based on Foata normal form. 0/3197 useless extension candidates. Maximal degree in co-relation 7973. Up to 2528 conditions per place. [2023-09-01 08:23:30,285 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 41 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-09-01 08:23:30,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 223 flow [2023-09-01 08:23:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:23:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:23:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-09-01 08:23:30,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4927536231884058 [2023-09-01 08:23:30,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-09-01 08:23:30,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-09-01 08:23:30,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:30,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-09-01 08:23:30,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:30,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:30,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:30,291 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 109 flow. Second operand 3 states and 442 transitions. [2023-09-01 08:23:30,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 223 flow [2023-09-01 08:23:30,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 215 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 08:23:30,292 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 103 flow [2023-09-01 08:23:30,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-09-01 08:23:30,293 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-09-01 08:23:30,293 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 103 flow [2023-09-01 08:23:30,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:30,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:30,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 08:23:30,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 08:23:30,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:30,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1838721211, now seen corresponding path program 1 times [2023-09-01 08:23:30,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:30,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086193211] [2023-09-01 08:23:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:30,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:30,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:30,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086193211] [2023-09-01 08:23:30,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086193211] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:23:30,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:23:30,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:23:30,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648750505] [2023-09-01 08:23:30,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:23:30,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:23:30,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:30,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:23:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 08:23:30,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 299 [2023-09-01 08:23:30,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 133.25) internal successors, (533), 4 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:30,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:30,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 299 [2023-09-01 08:23:30,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:30,890 INFO L130 PetriNetUnfolder]: 2816/4228 cut-off events. [2023-09-01 08:23:30,891 INFO L131 PetriNetUnfolder]: For 634/634 co-relation queries the response was YES. [2023-09-01 08:23:30,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9408 conditions, 4228 events. 2816/4228 cut-off events. For 634/634 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23067 event pairs, 2275 based on Foata normal form. 40/3428 useless extension candidates. Maximal degree in co-relation 9018. Up to 3915 conditions per place. [2023-09-01 08:23:30,913 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 27 selfloop transitions, 2 changer transitions 14/45 dead transitions. [2023-09-01 08:23:30,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 225 flow [2023-09-01 08:23:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:23:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:23:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 575 transitions. [2023-09-01 08:23:30,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2023-09-01 08:23:30,916 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 575 transitions. [2023-09-01 08:23:30,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 575 transitions. [2023-09-01 08:23:30,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:30,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 575 transitions. [2023-09-01 08:23:30,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:30,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:30,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:30,921 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 103 flow. Second operand 4 states and 575 transitions. [2023-09-01 08:23:30,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 225 flow [2023-09-01 08:23:30,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 219 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:23:30,924 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 121 flow [2023-09-01 08:23:30,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-09-01 08:23:30,924 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-09-01 08:23:30,925 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 121 flow [2023-09-01 08:23:30,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.25) internal successors, (533), 4 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:30,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:30,925 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 08:23:30,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 08:23:30,926 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:30,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:30,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1841919051, now seen corresponding path program 2 times [2023-09-01 08:23:30,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:30,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710296221] [2023-09-01 08:23:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:30,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:31,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:31,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710296221] [2023-09-01 08:23:31,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710296221] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:31,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005044167] [2023-09-01 08:23:31,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:23:31,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:31,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:31,031 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) [2023-09-01 08:23:31,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 08:23:31,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:23:31,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:23:31,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 08:23:31,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:23:31,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:23:31,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005044167] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:23:31,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:23:31,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-09-01 08:23:31,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373938395] [2023-09-01 08:23:31,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:23:31,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:23:31,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:23:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:23:31,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 299 [2023-09-01 08:23:31,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:31,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:31,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 299 [2023-09-01 08:23:31,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:31,389 INFO L130 PetriNetUnfolder]: 2725/4062 cut-off events. [2023-09-01 08:23:31,389 INFO L131 PetriNetUnfolder]: For 271/271 co-relation queries the response was YES. [2023-09-01 08:23:31,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9681 conditions, 4062 events. 2725/4062 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 21955 event pairs, 2184 based on Foata normal form. 1/2787 useless extension candidates. Maximal degree in co-relation 9660. Up to 3914 conditions per place. [2023-09-01 08:23:31,405 INFO L137 encePairwiseOnDemand]: 297/299 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-09-01 08:23:31,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 30 transitions, 167 flow [2023-09-01 08:23:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:23:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:23:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-09-01 08:23:31,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48272017837235226 [2023-09-01 08:23:31,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-09-01 08:23:31,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-09-01 08:23:31,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:31,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-09-01 08:23:31,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:31,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:31,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:31,410 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 121 flow. Second operand 3 states and 433 transitions. [2023-09-01 08:23:31,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 30 transitions, 167 flow [2023-09-01 08:23:31,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 30 transitions, 151 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-09-01 08:23:31,412 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 97 flow [2023-09-01 08:23:31,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2023-09-01 08:23:31,413 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-09-01 08:23:31,413 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 97 flow [2023-09-01 08:23:31,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:31,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:31,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:31,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 08:23:31,620 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 [2023-09-01 08:23:31,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:31,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:31,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1261717240, now seen corresponding path program 1 times [2023-09-01 08:23:31,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:31,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795948576] [2023-09-01 08:23:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:31,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:31,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:31,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795948576] [2023-09-01 08:23:31,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795948576] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:31,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402893460] [2023-09-01 08:23:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:31,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:31,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:31,721 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) [2023-09-01 08:23:31,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 08:23:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:23:31,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:23:31,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:23:31,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402893460] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:23:31,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:23:31,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-09-01 08:23:31,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726331728] [2023-09-01 08:23:31,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:23:31,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:23:31,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:31,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:23:31,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:23:31,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 299 [2023-09-01 08:23:31,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:31,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:31,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 299 [2023-09-01 08:23:31,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:32,055 INFO L130 PetriNetUnfolder]: 2045/3046 cut-off events. [2023-09-01 08:23:32,055 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2023-09-01 08:23:32,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7070 conditions, 3046 events. 2045/3046 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 15735 event pairs, 1576 based on Foata normal form. 0/2250 useless extension candidates. Maximal degree in co-relation 7060. Up to 2922 conditions per place. [2023-09-01 08:23:32,067 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 25 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-09-01 08:23:32,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 28 transitions, 141 flow [2023-09-01 08:23:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:23:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:23:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-09-01 08:23:32,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4816053511705686 [2023-09-01 08:23:32,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-09-01 08:23:32,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-09-01 08:23:32,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:32,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-09-01 08:23:32,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,072 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 97 flow. Second operand 3 states and 432 transitions. [2023-09-01 08:23:32,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 28 transitions, 141 flow [2023-09-01 08:23:32,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 28 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:23:32,073 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 90 flow [2023-09-01 08:23:32,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-09-01 08:23:32,074 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-09-01 08:23:32,074 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 90 flow [2023-09-01 08:23:32,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:32,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:32,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 08:23:32,277 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 [2023-09-01 08:23:32,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:32,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:32,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1261717129, now seen corresponding path program 1 times [2023-09-01 08:23:32,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:32,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131005568] [2023-09-01 08:23:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:32,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:23:32,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:32,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131005568] [2023-09-01 08:23:32,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131005568] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:23:32,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:23:32,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:23:32,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734617664] [2023-09-01 08:23:32,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:23:32,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:23:32,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:32,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:23:32,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 08:23:32,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 299 [2023-09-01 08:23:32,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:32,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 299 [2023-09-01 08:23:32,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:32,526 INFO L130 PetriNetUnfolder]: 1461/2286 cut-off events. [2023-09-01 08:23:32,527 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-09-01 08:23:32,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5339 conditions, 2286 events. 1461/2286 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12074 event pairs, 148 based on Foata normal form. 0/1886 useless extension candidates. Maximal degree in co-relation 5328. Up to 1928 conditions per place. [2023-09-01 08:23:32,538 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 34 selfloop transitions, 2 changer transitions 2/39 dead transitions. [2023-09-01 08:23:32,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 196 flow [2023-09-01 08:23:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:23:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:23:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 567 transitions. [2023-09-01 08:23:32,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47408026755852845 [2023-09-01 08:23:32,544 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 567 transitions. [2023-09-01 08:23:32,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 567 transitions. [2023-09-01 08:23:32,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:32,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 567 transitions. [2023-09-01 08:23:32,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,551 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,551 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 90 flow. Second operand 4 states and 567 transitions. [2023-09-01 08:23:32,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 196 flow [2023-09-01 08:23:32,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:23:32,554 INFO L231 Difference]: Finished difference. Result has 39 places, 26 transitions, 87 flow [2023-09-01 08:23:32,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=87, PETRI_PLACES=39, PETRI_TRANSITIONS=26} [2023-09-01 08:23:32,556 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-09-01 08:23:32,556 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 26 transitions, 87 flow [2023-09-01 08:23:32,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:32,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:32,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 08:23:32,557 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:32,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash -453850703, now seen corresponding path program 1 times [2023-09-01 08:23:32,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:32,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624694459] [2023-09-01 08:23:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:32,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:23:32,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:32,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624694459] [2023-09-01 08:23:32,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624694459] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:23:32,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:23:32,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:23:32,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597841194] [2023-09-01 08:23:32,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:23:32,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:23:32,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:23:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:23:32,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 299 [2023-09-01 08:23:32,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:32,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 299 [2023-09-01 08:23:32,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:32,800 INFO L130 PetriNetUnfolder]: 1293/2058 cut-off events. [2023-09-01 08:23:32,800 INFO L131 PetriNetUnfolder]: For 236/236 co-relation queries the response was YES. [2023-09-01 08:23:32,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4780 conditions, 2058 events. 1293/2058 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10259 event pairs, 476 based on Foata normal form. 88/1758 useless extension candidates. Maximal degree in co-relation 4768. Up to 1553 conditions per place. [2023-09-01 08:23:32,807 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 31 selfloop transitions, 2 changer transitions 3/38 dead transitions. [2023-09-01 08:23:32,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 190 flow [2023-09-01 08:23:32,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:23:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:23:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-09-01 08:23:32,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48049052396878483 [2023-09-01 08:23:32,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-09-01 08:23:32,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-09-01 08:23:32,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:32,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-09-01 08:23:32,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,811 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 87 flow. Second operand 3 states and 431 transitions. [2023-09-01 08:23:32,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 190 flow [2023-09-01 08:23:32,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 187 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:23:32,813 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 102 flow [2023-09-01 08:23:32,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-09-01 08:23:32,814 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-09-01 08:23:32,814 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 102 flow [2023-09-01 08:23:32,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:32,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:32,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:32,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 08:23:32,815 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:32,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1920808828, now seen corresponding path program 1 times [2023-09-01 08:23:32,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:32,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156064745] [2023-09-01 08:23:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:32,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:33,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:33,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156064745] [2023-09-01 08:23:33,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156064745] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:33,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037573648] [2023-09-01 08:23:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:33,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:33,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:33,138 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) [2023-09-01 08:23:33,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 08:23:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:33,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 08:23:33,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:33,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:23:33,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:23:33,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:23:33,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:23:33,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:23:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:33,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:23:33,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:23:33,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-09-01 08:23:33,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:23:33,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 157 [2023-09-01 08:23:33,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-09-01 08:23:33,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-09-01 08:23:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:33,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037573648] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:23:33,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:23:33,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2023-09-01 08:23:33,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323994010] [2023-09-01 08:23:33,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:23:33,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 08:23:33,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:33,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 08:23:33,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2023-09-01 08:23:35,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:23:36,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 299 [2023-09-01 08:23:36,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 102 flow. Second operand has 16 states, 16 states have (on average 99.875) internal successors, (1598), 16 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:36,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:36,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 299 [2023-09-01 08:23:36,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:38,182 INFO L130 PetriNetUnfolder]: 2187/3499 cut-off events. [2023-09-01 08:23:38,182 INFO L131 PetriNetUnfolder]: For 1181/1181 co-relation queries the response was YES. [2023-09-01 08:23:38,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9118 conditions, 3499 events. 2187/3499 cut-off events. For 1181/1181 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19506 event pairs, 824 based on Foata normal form. 0/2863 useless extension candidates. Maximal degree in co-relation 9105. Up to 1949 conditions per place. [2023-09-01 08:23:38,201 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 132 selfloop transitions, 64 changer transitions 5/203 dead transitions. [2023-09-01 08:23:38,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 203 transitions, 1092 flow [2023-09-01 08:23:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 08:23:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 08:23:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2662 transitions. [2023-09-01 08:23:38,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35612040133779266 [2023-09-01 08:23:38,207 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2662 transitions. [2023-09-01 08:23:38,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2662 transitions. [2023-09-01 08:23:38,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:38,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2662 transitions. [2023-09-01 08:23:38,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 106.48) internal successors, (2662), 25 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:38,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 299.0) internal successors, (7774), 26 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:38,223 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 299.0) internal successors, (7774), 26 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:38,224 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 102 flow. Second operand 25 states and 2662 transitions. [2023-09-01 08:23:38,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 203 transitions, 1092 flow [2023-09-01 08:23:38,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 203 transitions, 984 flow, removed 51 selfloop flow, removed 2 redundant places. [2023-09-01 08:23:38,230 INFO L231 Difference]: Finished difference. Result has 69 places, 88 transitions, 502 flow [2023-09-01 08:23:38,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=502, PETRI_PLACES=69, PETRI_TRANSITIONS=88} [2023-09-01 08:23:38,231 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-09-01 08:23:38,231 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 88 transitions, 502 flow [2023-09-01 08:23:38,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 99.875) internal successors, (1598), 16 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:38,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:38,232 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:38,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 08:23:38,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 08:23:38,438 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:38,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:38,438 INFO L85 PathProgramCache]: Analyzing trace with hash 483629055, now seen corresponding path program 1 times [2023-09-01 08:23:38,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:38,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506501675] [2023-09-01 08:23:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:38,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:39,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:39,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506501675] [2023-09-01 08:23:39,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506501675] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:39,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053149223] [2023-09-01 08:23:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:39,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:39,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:39,095 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) [2023-09-01 08:23:39,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 08:23:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:39,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 08:23:39,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:39,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:23:39,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:23:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:23:39,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:23:39,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:23:39,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2023-09-01 08:23:39,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-09-01 08:23:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:23:39,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053149223] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:39,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:23:39,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 15 [2023-09-01 08:23:39,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953427194] [2023-09-01 08:23:39,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:23:39,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 08:23:39,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:39,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 08:23:39,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=224, Unknown=3, NotChecked=0, Total=272 [2023-09-01 08:23:41,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:23:41,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 299 [2023-09-01 08:23:41,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 88 transitions, 502 flow. Second operand has 6 states, 6 states have (on average 118.66666666666667) internal successors, (712), 6 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:41,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:41,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 299 [2023-09-01 08:23:41,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:41,921 INFO L130 PetriNetUnfolder]: 2439/3843 cut-off events. [2023-09-01 08:23:41,921 INFO L131 PetriNetUnfolder]: For 11491/11491 co-relation queries the response was YES. [2023-09-01 08:23:41,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12560 conditions, 3843 events. 2439/3843 cut-off events. For 11491/11491 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21286 event pairs, 643 based on Foata normal form. 0/3134 useless extension candidates. Maximal degree in co-relation 12539. Up to 2611 conditions per place. [2023-09-01 08:23:41,941 INFO L137 encePairwiseOnDemand]: 292/299 looper letters, 74 selfloop transitions, 39 changer transitions 3/118 dead transitions. [2023-09-01 08:23:41,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 118 transitions, 851 flow [2023-09-01 08:23:41,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:23:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:23:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 639 transitions. [2023-09-01 08:23:41,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274247491638796 [2023-09-01 08:23:41,943 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 639 transitions. [2023-09-01 08:23:41,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 639 transitions. [2023-09-01 08:23:41,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:41,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 639 transitions. [2023-09-01 08:23:41,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:41,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 299.0) internal successors, (1794), 6 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:41,947 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 299.0) internal successors, (1794), 6 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:41,947 INFO L175 Difference]: Start difference. First operand has 69 places, 88 transitions, 502 flow. Second operand 5 states and 639 transitions. [2023-09-01 08:23:41,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 118 transitions, 851 flow [2023-09-01 08:23:41,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 118 transitions, 801 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-09-01 08:23:41,975 INFO L231 Difference]: Finished difference. Result has 71 places, 94 transitions, 611 flow [2023-09-01 08:23:41,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=611, PETRI_PLACES=71, PETRI_TRANSITIONS=94} [2023-09-01 08:23:41,977 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-09-01 08:23:41,977 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 94 transitions, 611 flow [2023-09-01 08:23:41,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 118.66666666666667) internal successors, (712), 6 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:41,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:41,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:41,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 08:23:42,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:42,183 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:42,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:42,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1914546208, now seen corresponding path program 2 times [2023-09-01 08:23:42,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:42,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860051703] [2023-09-01 08:23:42,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:42,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860051703] [2023-09-01 08:23:42,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860051703] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308703770] [2023-09-01 08:23:42,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:23:42,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:42,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:42,530 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) [2023-09-01 08:23:42,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 08:23:42,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:23:42,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:23:42,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 08:23:42,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:23:42,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:23:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:23:42,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:23:42,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308703770] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:23:42,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:23:42,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2023-09-01 08:23:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325617186] [2023-09-01 08:23:42,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:23:42,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 08:23:42,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:42,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 08:23:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-09-01 08:23:42,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 299 [2023-09-01 08:23:42,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 611 flow. Second operand has 6 states, 6 states have (on average 124.66666666666667) internal successors, (748), 6 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:42,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:42,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 299 [2023-09-01 08:23:42,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:43,055 INFO L130 PetriNetUnfolder]: 2098/3311 cut-off events. [2023-09-01 08:23:43,055 INFO L131 PetriNetUnfolder]: For 11372/11372 co-relation queries the response was YES. [2023-09-01 08:23:43,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11448 conditions, 3311 events. 2098/3311 cut-off events. For 11372/11372 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17781 event pairs, 658 based on Foata normal form. 6/2846 useless extension candidates. Maximal degree in co-relation 11425. Up to 2097 conditions per place. [2023-09-01 08:23:43,070 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 70 selfloop transitions, 30 changer transitions 3/105 dead transitions. [2023-09-01 08:23:43,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 105 transitions, 826 flow [2023-09-01 08:23:43,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:23:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:23:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 536 transitions. [2023-09-01 08:23:43,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44816053511705684 [2023-09-01 08:23:43,072 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 536 transitions. [2023-09-01 08:23:43,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 536 transitions. [2023-09-01 08:23:43,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:43,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 536 transitions. [2023-09-01 08:23:43,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:43,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:43,075 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:43,075 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 611 flow. Second operand 4 states and 536 transitions. [2023-09-01 08:23:43,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 105 transitions, 826 flow [2023-09-01 08:23:43,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 816 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 08:23:43,096 INFO L231 Difference]: Finished difference. Result has 70 places, 86 transitions, 602 flow [2023-09-01 08:23:43,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=602, PETRI_PLACES=70, PETRI_TRANSITIONS=86} [2023-09-01 08:23:43,096 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-09-01 08:23:43,097 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 86 transitions, 602 flow [2023-09-01 08:23:43,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 124.66666666666667) internal successors, (748), 6 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:43,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:43,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:43,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 08:23:43,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:43,302 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:43,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:43,303 INFO L85 PathProgramCache]: Analyzing trace with hash 584470044, now seen corresponding path program 1 times [2023-09-01 08:23:43,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:43,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141401772] [2023-09-01 08:23:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:43,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:43,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:43,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141401772] [2023-09-01 08:23:43,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141401772] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:43,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801339998] [2023-09-01 08:23:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:43,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:43,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:43,653 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) [2023-09-01 08:23:43,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 08:23:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:43,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 08:23:43,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:43,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:23:43,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:23:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:43,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:23:44,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:23:44,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2023-09-01 08:23:44,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-09-01 08:23:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:44,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801339998] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:23:44,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:23:44,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-09-01 08:23:44,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816728448] [2023-09-01 08:23:44,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:23:44,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 08:23:44,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 08:23:44,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=219, Unknown=1, NotChecked=0, Total=272 [2023-09-01 08:23:44,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 299 [2023-09-01 08:23:44,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 86 transitions, 602 flow. Second operand has 17 states, 17 states have (on average 116.94117647058823) internal successors, (1988), 17 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:44,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:44,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 299 [2023-09-01 08:23:44,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:45,512 INFO L130 PetriNetUnfolder]: 2845/4425 cut-off events. [2023-09-01 08:23:45,512 INFO L131 PetriNetUnfolder]: For 13585/13585 co-relation queries the response was YES. [2023-09-01 08:23:45,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15086 conditions, 4425 events. 2845/4425 cut-off events. For 13585/13585 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24751 event pairs, 969 based on Foata normal form. 0/3857 useless extension candidates. Maximal degree in co-relation 15063. Up to 2064 conditions per place. [2023-09-01 08:23:45,530 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 125 selfloop transitions, 59 changer transitions 3/189 dead transitions. [2023-09-01 08:23:45,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 189 transitions, 1407 flow [2023-09-01 08:23:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 08:23:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 08:23:45,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1751 transitions. [2023-09-01 08:23:45,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182990922121357 [2023-09-01 08:23:45,533 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1751 transitions. [2023-09-01 08:23:45,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1751 transitions. [2023-09-01 08:23:45,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:45,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1751 transitions. [2023-09-01 08:23:45,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 125.07142857142857) internal successors, (1751), 14 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:45,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 299.0) internal successors, (4485), 15 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:45,541 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 299.0) internal successors, (4485), 15 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:45,541 INFO L175 Difference]: Start difference. First operand has 70 places, 86 transitions, 602 flow. Second operand 14 states and 1751 transitions. [2023-09-01 08:23:45,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 189 transitions, 1407 flow [2023-09-01 08:23:45,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 189 transitions, 1341 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:23:45,556 INFO L231 Difference]: Finished difference. Result has 86 places, 109 transitions, 905 flow [2023-09-01 08:23:45,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=905, PETRI_PLACES=86, PETRI_TRANSITIONS=109} [2023-09-01 08:23:45,557 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2023-09-01 08:23:45,557 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 109 transitions, 905 flow [2023-09-01 08:23:45,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 116.94117647058823) internal successors, (1988), 17 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:45,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:45,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:45,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 08:23:45,762 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,SelfDestructingSolverStorable12 [2023-09-01 08:23:45,762 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:45,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:45,763 INFO L85 PathProgramCache]: Analyzing trace with hash 778611264, now seen corresponding path program 2 times [2023-09-01 08:23:45,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:45,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735456948] [2023-09-01 08:23:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:46,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:46,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735456948] [2023-09-01 08:23:46,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735456948] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:46,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114292617] [2023-09-01 08:23:46,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:23:46,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:46,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:46,157 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) [2023-09-01 08:23:46,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 08:23:46,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:23:46,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:23:46,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 08:23:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:46,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:23:46,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:23:46,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:23:46,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:23:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:23:46,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:23:46,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114292617] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:23:46,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:23:46,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-09-01 08:23:46,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604637434] [2023-09-01 08:23:46,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:23:46,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:23:46,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:46,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:23:46,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-09-01 08:23:46,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 299 [2023-09-01 08:23:46,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 109 transitions, 905 flow. Second operand has 7 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:46,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:46,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 299 [2023-09-01 08:23:46,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:46,981 INFO L130 PetriNetUnfolder]: 2838/4437 cut-off events. [2023-09-01 08:23:46,981 INFO L131 PetriNetUnfolder]: For 19173/19173 co-relation queries the response was YES. [2023-09-01 08:23:46,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17157 conditions, 4437 events. 2838/4437 cut-off events. For 19173/19173 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24692 event pairs, 824 based on Foata normal form. 0/3936 useless extension candidates. Maximal degree in co-relation 17128. Up to 2032 conditions per place. [2023-09-01 08:23:46,997 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 89 selfloop transitions, 34 changer transitions 3/128 dead transitions. [2023-09-01 08:23:46,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 128 transitions, 1236 flow [2023-09-01 08:23:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:23:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:23:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 528 transitions. [2023-09-01 08:23:46,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4414715719063545 [2023-09-01 08:23:46,998 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 528 transitions. [2023-09-01 08:23:46,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 528 transitions. [2023-09-01 08:23:46,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:46,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 528 transitions. [2023-09-01 08:23:46,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:47,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:47,001 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:47,001 INFO L175 Difference]: Start difference. First operand has 86 places, 109 transitions, 905 flow. Second operand 4 states and 528 transitions. [2023-09-01 08:23:47,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 128 transitions, 1236 flow [2023-09-01 08:23:47,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 1200 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-09-01 08:23:47,036 INFO L231 Difference]: Finished difference. Result has 86 places, 109 transitions, 980 flow [2023-09-01 08:23:47,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=980, PETRI_PLACES=86, PETRI_TRANSITIONS=109} [2023-09-01 08:23:47,037 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2023-09-01 08:23:47,037 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 109 transitions, 980 flow [2023-09-01 08:23:47,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:47,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:47,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:47,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-09-01 08:23:47,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 08:23:47,242 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:47,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:47,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2107600325, now seen corresponding path program 1 times [2023-09-01 08:23:47,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:47,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995387124] [2023-09-01 08:23:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:47,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:47,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:47,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995387124] [2023-09-01 08:23:47,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995387124] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:47,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081604488] [2023-09-01 08:23:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:47,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:47,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:47,944 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) [2023-09-01 08:23:47,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 08:23:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:48,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 08:23:48,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:48,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:23:48,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:23:48,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:23:48,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:23:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:23:48,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:23:48,267 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_514 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_514) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 2147483649 c_~d~0))) is different from false [2023-09-01 08:23:52,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:23:52,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 166 [2023-09-01 08:23:52,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2023-09-01 08:23:52,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2023-09-01 08:23:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:23:52,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081604488] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:52,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:23:52,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2023-09-01 08:23:52,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246658257] [2023-09-01 08:23:52,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:23:52,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:23:52,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:52,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:23:52,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=283, Unknown=7, NotChecked=34, Total=380 [2023-09-01 08:23:52,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 299 [2023-09-01 08:23:52,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 109 transitions, 980 flow. Second operand has 7 states, 7 states have (on average 111.57142857142857) internal successors, (781), 7 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) [2023-09-01 08:23:52,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:52,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 299 [2023-09-01 08:23:52,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:56,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:23:57,034 INFO L130 PetriNetUnfolder]: 2710/4258 cut-off events. [2023-09-01 08:23:57,034 INFO L131 PetriNetUnfolder]: For 19313/19313 co-relation queries the response was YES. [2023-09-01 08:23:57,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17066 conditions, 4258 events. 2710/4258 cut-off events. For 19313/19313 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 23636 event pairs, 535 based on Foata normal form. 57/3864 useless extension candidates. Maximal degree in co-relation 17035. Up to 2297 conditions per place. [2023-09-01 08:23:57,053 INFO L137 encePairwiseOnDemand]: 291/299 looper letters, 93 selfloop transitions, 60 changer transitions 3/158 dead transitions. [2023-09-01 08:23:57,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 158 transitions, 1580 flow [2023-09-01 08:23:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:23:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:23:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 723 transitions. [2023-09-01 08:23:57,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40301003344481606 [2023-09-01 08:23:57,055 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 723 transitions. [2023-09-01 08:23:57,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 723 transitions. [2023-09-01 08:23:57,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:57,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 723 transitions. [2023-09-01 08:23:57,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.5) internal successors, (723), 6 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:57,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:57,059 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:57,060 INFO L175 Difference]: Start difference. First operand has 86 places, 109 transitions, 980 flow. Second operand 6 states and 723 transitions. [2023-09-01 08:23:57,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 158 transitions, 1580 flow [2023-09-01 08:23:57,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 158 transitions, 1538 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:23:57,092 INFO L231 Difference]: Finished difference. Result has 91 places, 126 transitions, 1304 flow [2023-09-01 08:23:57,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1304, PETRI_PLACES=91, PETRI_TRANSITIONS=126} [2023-09-01 08:23:57,092 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2023-09-01 08:23:57,092 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 126 transitions, 1304 flow [2023-09-01 08:23:57,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.57142857142857) internal successors, (781), 7 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) [2023-09-01 08:23:57,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:57,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:57,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-09-01 08:23:57,298 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,SelfDestructingSolverStorable14 [2023-09-01 08:23:57,298 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:23:57,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:57,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1632846295, now seen corresponding path program 1 times [2023-09-01 08:23:57,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:57,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079104966] [2023-09-01 08:23:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:57,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:57,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:57,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079104966] [2023-09-01 08:23:57,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079104966] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:57,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808981088] [2023-09-01 08:23:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:57,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:57,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:57,701 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) [2023-09-01 08:23:57,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 08:23:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:57,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 08:23:57,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:57,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:23:57,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:23:57,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:23:58,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:23:58,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:23:58,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:23:58,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:23:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:58,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:23:58,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:23:58,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-09-01 08:23:58,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:23:58,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 359 treesize of output 343 [2023-09-01 08:23:58,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 71 [2023-09-01 08:23:58,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 130 [2023-09-01 08:23:58,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 58 [2023-09-01 08:23:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:58,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808981088] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:23:58,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:23:58,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-09-01 08:23:58,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513943673] [2023-09-01 08:23:58,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:23:58,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 08:23:58,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:58,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 08:23:58,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=305, Unknown=8, NotChecked=0, Total=380 [2023-09-01 08:24:00,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:24:00,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 299 [2023-09-01 08:24:00,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 126 transitions, 1304 flow. Second operand has 20 states, 20 states have (on average 96.8) internal successors, (1936), 20 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:00,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:24:00,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 299 [2023-09-01 08:24:00,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:24:04,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:24:04,457 INFO L130 PetriNetUnfolder]: 2916/4531 cut-off events. [2023-09-01 08:24:04,457 INFO L131 PetriNetUnfolder]: For 26685/26701 co-relation queries the response was YES. [2023-09-01 08:24:04,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19940 conditions, 4531 events. 2916/4531 cut-off events. For 26685/26701 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25082 event pairs, 1053 based on Foata normal form. 67/4076 useless extension candidates. Maximal degree in co-relation 19907. Up to 2163 conditions per place. [2023-09-01 08:24:04,479 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 139 selfloop transitions, 67 changer transitions 4/212 dead transitions. [2023-09-01 08:24:04,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 212 transitions, 2134 flow [2023-09-01 08:24:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 08:24:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 08:24:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1459 transitions. [2023-09-01 08:24:04,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34854276158623987 [2023-09-01 08:24:04,483 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1459 transitions. [2023-09-01 08:24:04,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1459 transitions. [2023-09-01 08:24:04,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:24:04,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1459 transitions. [2023-09-01 08:24:04,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 104.21428571428571) internal successors, (1459), 14 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:04,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 299.0) internal successors, (4485), 15 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:04,490 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 299.0) internal successors, (4485), 15 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:04,490 INFO L175 Difference]: Start difference. First operand has 91 places, 126 transitions, 1304 flow. Second operand 14 states and 1459 transitions. [2023-09-01 08:24:04,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 212 transitions, 2134 flow [2023-09-01 08:24:04,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 212 transitions, 2031 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-09-01 08:24:04,540 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1444 flow [2023-09-01 08:24:04,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1444, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2023-09-01 08:24:04,541 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 64 predicate places. [2023-09-01 08:24:04,541 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1444 flow [2023-09-01 08:24:04,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 96.8) internal successors, (1936), 20 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:04,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:24:04,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:24:04,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 08:24:04,746 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,SelfDestructingSolverStorable15 [2023-09-01 08:24:04,746 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:24:04,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:24:04,747 INFO L85 PathProgramCache]: Analyzing trace with hash -966002759, now seen corresponding path program 1 times [2023-09-01 08:24:04,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:24:04,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935949745] [2023-09-01 08:24:04,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:24:04,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:24:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:24:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:24:04,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:24:04,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935949745] [2023-09-01 08:24:04,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935949745] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:24:04,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786886138] [2023-09-01 08:24:04,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:24:04,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:24:04,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:24:04,812 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) [2023-09-01 08:24:04,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 08:24:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:24:04,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 08:24:04,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:24:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:04,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:24:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:05,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786886138] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:24:05,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:24:05,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2023-09-01 08:24:05,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152694083] [2023-09-01 08:24:05,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:24:05,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 08:24:05,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:24:05,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 08:24:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:24:05,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 299 [2023-09-01 08:24:05,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1444 flow. Second operand has 15 states, 15 states have (on average 128.4) internal successors, (1926), 15 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:05,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:24:05,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 299 [2023-09-01 08:24:05,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:24:05,841 INFO L130 PetriNetUnfolder]: 4142/6635 cut-off events. [2023-09-01 08:24:05,841 INFO L131 PetriNetUnfolder]: For 47882/47882 co-relation queries the response was YES. [2023-09-01 08:24:05,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29804 conditions, 6635 events. 4142/6635 cut-off events. For 47882/47882 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40793 event pairs, 1348 based on Foata normal form. 173/6112 useless extension candidates. Maximal degree in co-relation 29770. Up to 1956 conditions per place. [2023-09-01 08:24:05,871 INFO L137 encePairwiseOnDemand]: 292/299 looper letters, 89 selfloop transitions, 28 changer transitions 96/215 dead transitions. [2023-09-01 08:24:05,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 215 transitions, 2494 flow [2023-09-01 08:24:05,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 08:24:05,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 08:24:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1228 transitions. [2023-09-01 08:24:05,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45633593459680416 [2023-09-01 08:24:05,880 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1228 transitions. [2023-09-01 08:24:05,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1228 transitions. [2023-09-01 08:24:05,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:24:05,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1228 transitions. [2023-09-01 08:24:05,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 136.44444444444446) internal successors, (1228), 9 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:05,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 299.0) internal successors, (2990), 10 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:05,885 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 299.0) internal successors, (2990), 10 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:05,885 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1444 flow. Second operand 9 states and 1228 transitions. [2023-09-01 08:24:05,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 215 transitions, 2494 flow [2023-09-01 08:24:05,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 215 transitions, 2445 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-09-01 08:24:05,967 INFO L231 Difference]: Finished difference. Result has 107 places, 85 transitions, 1074 flow [2023-09-01 08:24:05,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1074, PETRI_PLACES=107, PETRI_TRANSITIONS=85} [2023-09-01 08:24:05,968 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 69 predicate places. [2023-09-01 08:24:05,968 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 85 transitions, 1074 flow [2023-09-01 08:24:05,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.4) internal successors, (1926), 15 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:05,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:24:05,968 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:24:05,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 08:24:06,173 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,SelfDestructingSolverStorable16 [2023-09-01 08:24:06,173 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:24:06,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:24:06,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1828583879, now seen corresponding path program 2 times [2023-09-01 08:24:06,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:24:06,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875357184] [2023-09-01 08:24:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:24:06,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:24:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:24:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:07,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:24:07,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875357184] [2023-09-01 08:24:07,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875357184] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:24:07,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786676321] [2023-09-01 08:24:07,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:24:07,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:24:07,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:24:07,085 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) [2023-09-01 08:24:07,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 08:24:07,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:24:07,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:24:07,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 08:24:07,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:24:07,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:24:07,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:24:07,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:24:07,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:24:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:24:07,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:24:07,407 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_657 (Array Int Int))) (< 0 (+ 2147483649 c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_657) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2023-09-01 08:24:09,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:24:09,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2023-09-01 08:24:09,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2023-09-01 08:24:09,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-09-01 08:24:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-09-01 08:24:09,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786676321] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:24:09,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:24:09,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 20 [2023-09-01 08:24:09,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900890918] [2023-09-01 08:24:09,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:24:09,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 08:24:09,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:24:09,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 08:24:09,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=4, NotChecked=38, Total=462 [2023-09-01 08:24:09,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 299 [2023-09-01 08:24:09,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 85 transitions, 1074 flow. Second operand has 22 states, 22 states have (on average 96.81818181818181) internal successors, (2130), 22 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:09,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:24:09,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 299 [2023-09-01 08:24:09,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:24:11,098 INFO L130 PetriNetUnfolder]: 2561/4161 cut-off events. [2023-09-01 08:24:11,098 INFO L131 PetriNetUnfolder]: For 42479/42575 co-relation queries the response was YES. [2023-09-01 08:24:11,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20652 conditions, 4161 events. 2561/4161 cut-off events. For 42479/42575 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 23308 event pairs, 892 based on Foata normal form. 90/3776 useless extension candidates. Maximal degree in co-relation 20615. Up to 1785 conditions per place. [2023-09-01 08:24:11,117 INFO L137 encePairwiseOnDemand]: 293/299 looper letters, 94 selfloop transitions, 45 changer transitions 9/150 dead transitions. [2023-09-01 08:24:11,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 150 transitions, 1794 flow [2023-09-01 08:24:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 08:24:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 08:24:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1134 transitions. [2023-09-01 08:24:11,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447856491334752 [2023-09-01 08:24:11,119 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1134 transitions. [2023-09-01 08:24:11,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1134 transitions. [2023-09-01 08:24:11,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:24:11,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1134 transitions. [2023-09-01 08:24:11,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 103.0909090909091) internal successors, (1134), 11 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:11,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:11,124 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:11,124 INFO L175 Difference]: Start difference. First operand has 107 places, 85 transitions, 1074 flow. Second operand 11 states and 1134 transitions. [2023-09-01 08:24:11,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 150 transitions, 1794 flow [2023-09-01 08:24:11,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 150 transitions, 1589 flow, removed 89 selfloop flow, removed 13 redundant places. [2023-09-01 08:24:11,191 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 1135 flow [2023-09-01 08:24:11,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1135, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2023-09-01 08:24:11,192 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-09-01 08:24:11,192 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 1135 flow [2023-09-01 08:24:11,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 96.81818181818181) internal successors, (2130), 22 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:11,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:24:11,193 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:24:11,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 08:24:11,397 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,SelfDestructingSolverStorable17 [2023-09-01 08:24:11,397 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:24:11,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:24:11,398 INFO L85 PathProgramCache]: Analyzing trace with hash 203769688, now seen corresponding path program 1 times [2023-09-01 08:24:11,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:24:11,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594835571] [2023-09-01 08:24:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:24:11,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:24:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:24:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:11,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:24:11,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594835571] [2023-09-01 08:24:11,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594835571] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:24:11,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492026569] [2023-09-01 08:24:11,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:24:11,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:24:11,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:24:11,797 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) [2023-09-01 08:24:11,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 08:24:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:24:11,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 08:24:11,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:24:11,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:24:12,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:24:12,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:24:12,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:24:12,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:24:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:12,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:24:12,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:24:12,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2023-09-01 08:24:12,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:24:12,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 405 treesize of output 391 [2023-09-01 08:24:12,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:24:12,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 106 [2023-09-01 08:24:12,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:24:12,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 93 [2023-09-01 08:24:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:13,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492026569] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:24:13,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:24:13,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-09-01 08:24:13,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459370446] [2023-09-01 08:24:13,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:24:13,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 08:24:13,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:24:13,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 08:24:13,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=653, Unknown=1, NotChecked=0, Total=756 [2023-09-01 08:24:15,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-09-01 08:24:15,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 1135 flow. Second operand has 28 states, 28 states have (on average 98.60714285714286) internal successors, (2761), 28 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:15,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:24:15,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-09-01 08:24:15,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:24:17,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:24:19,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:24:22,434 INFO L130 PetriNetUnfolder]: 4521/7169 cut-off events. [2023-09-01 08:24:22,434 INFO L131 PetriNetUnfolder]: For 35577/35577 co-relation queries the response was YES. [2023-09-01 08:24:22,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29656 conditions, 7169 events. 4521/7169 cut-off events. For 35577/35577 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 43692 event pairs, 1493 based on Foata normal form. 88/6372 useless extension candidates. Maximal degree in co-relation 29628. Up to 4130 conditions per place. [2023-09-01 08:24:22,466 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 209 selfloop transitions, 112 changer transitions 11/334 dead transitions. [2023-09-01 08:24:22,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 334 transitions, 3272 flow [2023-09-01 08:24:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 08:24:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 08:24:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2975 transitions. [2023-09-01 08:24:22,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35535117056856186 [2023-09-01 08:24:22,470 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2975 transitions. [2023-09-01 08:24:22,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2975 transitions. [2023-09-01 08:24:22,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:24:22,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2975 transitions. [2023-09-01 08:24:22,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 106.25) internal successors, (2975), 28 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:22,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 299.0) internal successors, (8671), 29 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:22,481 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 299.0) internal successors, (8671), 29 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:22,481 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 1135 flow. Second operand 28 states and 2975 transitions. [2023-09-01 08:24:22,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 334 transitions, 3272 flow [2023-09-01 08:24:22,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 334 transitions, 3112 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-09-01 08:24:22,514 INFO L231 Difference]: Finished difference. Result has 99 places, 180 transitions, 2269 flow [2023-09-01 08:24:22,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2269, PETRI_PLACES=99, PETRI_TRANSITIONS=180} [2023-09-01 08:24:22,515 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 61 predicate places. [2023-09-01 08:24:22,515 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 180 transitions, 2269 flow [2023-09-01 08:24:22,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.60714285714286) internal successors, (2761), 28 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:22,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:24:22,516 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:24:22,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 08:24:22,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:24:22,720 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:24:22,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:24:22,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1866153395, now seen corresponding path program 2 times [2023-09-01 08:24:22,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:24:22,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686705276] [2023-09-01 08:24:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:24:22,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:24:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:24:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:23,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:24:23,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686705276] [2023-09-01 08:24:23,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686705276] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:24:23,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196067901] [2023-09-01 08:24:23,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:24:23,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:24:23,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:24:23,294 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:24:23,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 08:24:23,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:24:23,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:24:23,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 08:24:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:24:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:24:23,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:24:23,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:24:23,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2023-09-01 08:24:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:24:23,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196067901] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:24:23,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:24:23,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 21 [2023-09-01 08:24:23,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803524387] [2023-09-01 08:24:23,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:24:23,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 08:24:23,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:24:23,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 08:24:23,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-09-01 08:24:24,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 299 [2023-09-01 08:24:24,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 180 transitions, 2269 flow. Second operand has 23 states, 23 states have (on average 120.0) internal successors, (2760), 23 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:24,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:24:24,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 299 [2023-09-01 08:24:24,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:24:25,377 INFO L130 PetriNetUnfolder]: 4876/7832 cut-off events. [2023-09-01 08:24:25,378 INFO L131 PetriNetUnfolder]: For 38520/38520 co-relation queries the response was YES. [2023-09-01 08:24:25,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33315 conditions, 7832 events. 4876/7832 cut-off events. For 38520/38520 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 49054 event pairs, 1479 based on Foata normal form. 0/6971 useless extension candidates. Maximal degree in co-relation 33287. Up to 5483 conditions per place. [2023-09-01 08:24:25,422 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 210 selfloop transitions, 82 changer transitions 12/306 dead transitions. [2023-09-01 08:24:25,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 306 transitions, 3501 flow [2023-09-01 08:24:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 08:24:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 08:24:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2168 transitions. [2023-09-01 08:24:25,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42651977178831396 [2023-09-01 08:24:25,426 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2168 transitions. [2023-09-01 08:24:25,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2168 transitions. [2023-09-01 08:24:25,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:24:25,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2168 transitions. [2023-09-01 08:24:25,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 127.52941176470588) internal successors, (2168), 17 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:25,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 299.0) internal successors, (5382), 18 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:25,441 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 299.0) internal successors, (5382), 18 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:25,442 INFO L175 Difference]: Start difference. First operand has 99 places, 180 transitions, 2269 flow. Second operand 17 states and 2168 transitions. [2023-09-01 08:24:25,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 306 transitions, 3501 flow [2023-09-01 08:24:25,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 306 transitions, 3059 flow, removed 214 selfloop flow, removed 5 redundant places. [2023-09-01 08:24:25,506 INFO L231 Difference]: Finished difference. Result has 115 places, 203 transitions, 2332 flow [2023-09-01 08:24:25,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2332, PETRI_PLACES=115, PETRI_TRANSITIONS=203} [2023-09-01 08:24:25,506 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 77 predicate places. [2023-09-01 08:24:25,507 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 203 transitions, 2332 flow [2023-09-01 08:24:25,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 120.0) internal successors, (2760), 23 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:25,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:24:25,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:24:25,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-09-01 08:24:25,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:24:25,713 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:24:25,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:24:25,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1692522056, now seen corresponding path program 3 times [2023-09-01 08:24:25,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:24:25,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384339622] [2023-09-01 08:24:25,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:24:25,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:24:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:24:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:26,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:24:26,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384339622] [2023-09-01 08:24:26,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384339622] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:24:26,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696766210] [2023-09-01 08:24:26,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:24:26,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:24:26,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:24:26,213 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:24:26,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 08:24:26,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:24:26,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:24:26,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 08:24:26,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:24:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:26,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:24:26,810 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 08:24:26,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 51 [2023-09-01 08:24:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:27,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696766210] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:24:27,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:24:27,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-09-01 08:24:27,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373377930] [2023-09-01 08:24:27,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:24:27,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 08:24:27,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:24:27,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 08:24:27,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2023-09-01 08:24:27,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 299 [2023-09-01 08:24:27,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 203 transitions, 2332 flow. Second operand has 26 states, 26 states have (on average 117.73076923076923) internal successors, (3061), 26 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:27,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:24:27,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 299 [2023-09-01 08:24:27,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:24:31,860 INFO L130 PetriNetUnfolder]: 8701/13931 cut-off events. [2023-09-01 08:24:31,861 INFO L131 PetriNetUnfolder]: For 87801/87801 co-relation queries the response was YES. [2023-09-01 08:24:31,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61793 conditions, 13931 events. 8701/13931 cut-off events. For 87801/87801 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 95461 event pairs, 2285 based on Foata normal form. 195/12498 useless extension candidates. Maximal degree in co-relation 61759. Up to 4544 conditions per place. [2023-09-01 08:24:31,953 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 367 selfloop transitions, 199 changer transitions 22/590 dead transitions. [2023-09-01 08:24:31,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 590 transitions, 6267 flow [2023-09-01 08:24:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 08:24:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 08:24:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4662 transitions. [2023-09-01 08:24:31,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214046822742475 [2023-09-01 08:24:31,958 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4662 transitions. [2023-09-01 08:24:31,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4662 transitions. [2023-09-01 08:24:31,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:24:31,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4662 transitions. [2023-09-01 08:24:31,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 126.0) internal successors, (4662), 37 states have internal predecessors, (4662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:31,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 299.0) internal successors, (11362), 38 states have internal predecessors, (11362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:31,971 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 299.0) internal successors, (11362), 38 states have internal predecessors, (11362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:31,971 INFO L175 Difference]: Start difference. First operand has 115 places, 203 transitions, 2332 flow. Second operand 37 states and 4662 transitions. [2023-09-01 08:24:31,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 590 transitions, 6267 flow [2023-09-01 08:24:32,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 590 transitions, 6079 flow, removed 63 selfloop flow, removed 8 redundant places. [2023-09-01 08:24:32,160 INFO L231 Difference]: Finished difference. Result has 157 places, 328 transitions, 4628 flow [2023-09-01 08:24:32,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4628, PETRI_PLACES=157, PETRI_TRANSITIONS=328} [2023-09-01 08:24:32,161 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 119 predicate places. [2023-09-01 08:24:32,161 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 328 transitions, 4628 flow [2023-09-01 08:24:32,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 117.73076923076923) internal successors, (3061), 26 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:32,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:24:32,162 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:24:32,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-09-01 08:24:32,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:24:32,369 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:24:32,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:24:32,370 INFO L85 PathProgramCache]: Analyzing trace with hash 935119790, now seen corresponding path program 1 times [2023-09-01 08:24:32,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:24:32,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893031521] [2023-09-01 08:24:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:24:32,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:24:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:24:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:32,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:24:32,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893031521] [2023-09-01 08:24:32,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893031521] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:24:32,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804892267] [2023-09-01 08:24:32,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:24:32,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:24:32,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:24:32,885 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:24:32,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 08:24:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:24:32,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 46 conjunts are in the unsatisfiable core [2023-09-01 08:24:32,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:24:33,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-09-01 08:24:33,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:24:33,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:24:33,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:24:33,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:24:33,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:24:33,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:24:33,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 32 [2023-09-01 08:24:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:33,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:24:34,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:24:34,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 83 [2023-09-01 08:24:34,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:24:34,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31646 treesize of output 28467 [2023-09-01 08:24:34,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:24:34,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 268 [2023-09-01 08:24:34,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:24:34,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 218 [2023-09-01 08:24:34,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 62 [2023-09-01 08:24:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:36,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804892267] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:24:36,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:24:36,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-09-01 08:24:36,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450057331] [2023-09-01 08:24:36,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:24:36,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 08:24:36,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:24:36,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 08:24:36,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=739, Unknown=10, NotChecked=0, Total=870 [2023-09-01 08:24:36,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 299 [2023-09-01 08:24:36,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 328 transitions, 4628 flow. Second operand has 30 states, 30 states have (on average 95.6) internal successors, (2868), 30 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:36,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:24:36,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 299 [2023-09-01 08:24:36,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:24:39,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:24:41,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:24:44,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:24:46,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:24:48,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:24:59,939 WARN L222 SmtUtils]: Spent 10.35s on a formula simplification. DAG size of input: 135 DAG size of output: 112 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:25:02,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:09,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:11,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:13,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:17,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:20,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:24,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:26,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:28,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:30,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:37,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:39,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:41,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:43,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:45,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:47,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:49,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:53,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:25:57,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:04,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:06,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:08,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:10,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:12,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:14,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:16,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:19,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:21,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:23,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:25,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:27,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:29,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:31,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:33,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:36,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:38,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:40,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:42,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:45,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:47,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:26:48,105 INFO L130 PetriNetUnfolder]: 13183/21504 cut-off events. [2023-09-01 08:26:48,105 INFO L131 PetriNetUnfolder]: For 297281/297281 co-relation queries the response was YES. [2023-09-01 08:26:48,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113394 conditions, 21504 events. 13183/21504 cut-off events. For 297281/297281 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 156205 event pairs, 2937 based on Foata normal form. 1027/20041 useless extension candidates. Maximal degree in co-relation 113344. Up to 6770 conditions per place. [2023-09-01 08:26:48,315 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 404 selfloop transitions, 335 changer transitions 19/760 dead transitions. [2023-09-01 08:26:48,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 760 transitions, 10366 flow [2023-09-01 08:26:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 08:26:48,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 08:26:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4133 transitions. [2023-09-01 08:26:48,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3455685618729097 [2023-09-01 08:26:48,322 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4133 transitions. [2023-09-01 08:26:48,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4133 transitions. [2023-09-01 08:26:48,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:26:48,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4133 transitions. [2023-09-01 08:26:48,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 103.325) internal successors, (4133), 40 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:26:48,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 299.0) internal successors, (12259), 41 states have internal predecessors, (12259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:26:48,338 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 299.0) internal successors, (12259), 41 states have internal predecessors, (12259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:26:48,338 INFO L175 Difference]: Start difference. First operand has 157 places, 328 transitions, 4628 flow. Second operand 40 states and 4133 transitions. [2023-09-01 08:26:48,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 760 transitions, 10366 flow [2023-09-01 08:26:49,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 760 transitions, 9104 flow, removed 595 selfloop flow, removed 11 redundant places. [2023-09-01 08:26:49,929 INFO L231 Difference]: Finished difference. Result has 205 places, 508 transitions, 7734 flow [2023-09-01 08:26:49,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=7734, PETRI_PLACES=205, PETRI_TRANSITIONS=508} [2023-09-01 08:26:49,930 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 167 predicate places. [2023-09-01 08:26:49,930 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 508 transitions, 7734 flow [2023-09-01 08:26:49,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 95.6) internal successors, (2868), 30 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:26:49,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:26:49,930 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:26:49,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-09-01 08:26:50,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:26:50,139 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:26:50,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:26:50,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1831096115, now seen corresponding path program 4 times [2023-09-01 08:26:50,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:26:50,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962197265] [2023-09-01 08:26:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:26:50,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:26:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:26:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:26:50,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:26:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962197265] [2023-09-01 08:26:50,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962197265] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:26:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575234877] [2023-09-01 08:26:50,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:26:50,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:26:50,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:26:50,861 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:26:50,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 08:26:50,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:26:50,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:26:50,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 08:26:50,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:26:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:26:51,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:26:51,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:26:51,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2023-09-01 08:26:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:26:51,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575234877] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:26:51,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:26:51,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 21 [2023-09-01 08:26:51,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734995036] [2023-09-01 08:26:51,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:26:51,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 08:26:51,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:26:51,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 08:26:51,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-09-01 08:26:52,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 299 [2023-09-01 08:26:52,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 508 transitions, 7734 flow. Second operand has 23 states, 23 states have (on average 120.0) internal successors, (2760), 23 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:26:52,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:26:52,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 299 [2023-09-01 08:26:52,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:26:59,337 INFO L130 PetriNetUnfolder]: 16293/26495 cut-off events. [2023-09-01 08:26:59,338 INFO L131 PetriNetUnfolder]: For 412968/412968 co-relation queries the response was YES. [2023-09-01 08:26:59,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149480 conditions, 26495 events. 16293/26495 cut-off events. For 412968/412968 co-relation queries the response was YES. Maximal size of possible extension queue 1207. Compared 199868 event pairs, 5681 based on Foata normal form. 211/23613 useless extension candidates. Maximal degree in co-relation 149413. Up to 18061 conditions per place. [2023-09-01 08:26:59,706 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 586 selfloop transitions, 262 changer transitions 42/892 dead transitions. [2023-09-01 08:26:59,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 892 transitions, 13271 flow [2023-09-01 08:26:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 08:26:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 08:26:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4710 transitions. [2023-09-01 08:26:59,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42574346922173006 [2023-09-01 08:26:59,715 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4710 transitions. [2023-09-01 08:26:59,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4710 transitions. [2023-09-01 08:26:59,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:26:59,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4710 transitions. [2023-09-01 08:26:59,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 127.29729729729729) internal successors, (4710), 37 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:26:59,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 299.0) internal successors, (11362), 38 states have internal predecessors, (11362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:26:59,740 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 299.0) internal successors, (11362), 38 states have internal predecessors, (11362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:26:59,740 INFO L175 Difference]: Start difference. First operand has 205 places, 508 transitions, 7734 flow. Second operand 37 states and 4710 transitions. [2023-09-01 08:26:59,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 892 transitions, 13271 flow [2023-09-01 08:27:04,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 892 transitions, 11624 flow, removed 815 selfloop flow, removed 6 redundant places. [2023-09-01 08:27:04,250 INFO L231 Difference]: Finished difference. Result has 243 places, 639 transitions, 9335 flow [2023-09-01 08:27:04,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=6499, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=9335, PETRI_PLACES=243, PETRI_TRANSITIONS=639} [2023-09-01 08:27:04,251 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 205 predicate places. [2023-09-01 08:27:04,252 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 639 transitions, 9335 flow [2023-09-01 08:27:04,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 120.0) internal successors, (2760), 23 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:04,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:04,252 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:27:04,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-09-01 08:27:04,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:04,457 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:27:04,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:04,457 INFO L85 PathProgramCache]: Analyzing trace with hash 925687215, now seen corresponding path program 1 times [2023-09-01 08:27:04,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:04,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113820575] [2023-09-01 08:27:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:04,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:05,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:05,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113820575] [2023-09-01 08:27:05,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113820575] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:27:05,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350165822] [2023-09-01 08:27:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:05,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:05,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:27:05,636 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:27:05,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 08:27:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 08:27:05,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:27:06,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:27:06,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-09-01 08:27:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:27:06,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:27:06,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:27:06,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 73 [2023-09-01 08:27:06,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 10 [2023-09-01 08:27:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:27:06,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350165822] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:27:06,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:27:06,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2023-09-01 08:27:06,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330139324] [2023-09-01 08:27:06,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:27:06,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 08:27:06,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:06,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 08:27:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=663, Unknown=2, NotChecked=0, Total=756 [2023-09-01 08:27:07,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 299 [2023-09-01 08:27:07,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 639 transitions, 9335 flow. Second operand has 28 states, 28 states have (on average 106.75) internal successors, (2989), 28 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:07,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:07,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 299 [2023-09-01 08:27:07,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:10,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:27:13,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:27:15,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:27:22,597 INFO L130 PetriNetUnfolder]: 20769/33650 cut-off events. [2023-09-01 08:27:22,597 INFO L131 PetriNetUnfolder]: For 563512/563512 co-relation queries the response was YES. [2023-09-01 08:27:23,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186499 conditions, 33650 events. 20769/33650 cut-off events. For 563512/563512 co-relation queries the response was YES. Maximal size of possible extension queue 1518. Compared 261003 event pairs, 5248 based on Foata normal form. 399/30383 useless extension candidates. Maximal degree in co-relation 186423. Up to 17620 conditions per place. [2023-09-01 08:27:23,415 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 566 selfloop transitions, 382 changer transitions 27/977 dead transitions. [2023-09-01 08:27:23,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 977 transitions, 14927 flow [2023-09-01 08:27:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 08:27:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 08:27:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3436 transitions. [2023-09-01 08:27:23,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3830546265328874 [2023-09-01 08:27:23,420 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3436 transitions. [2023-09-01 08:27:23,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3436 transitions. [2023-09-01 08:27:23,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:23,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3436 transitions. [2023-09-01 08:27:23,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 114.53333333333333) internal successors, (3436), 30 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:23,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 299.0) internal successors, (9269), 31 states have internal predecessors, (9269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:23,463 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 299.0) internal successors, (9269), 31 states have internal predecessors, (9269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:23,464 INFO L175 Difference]: Start difference. First operand has 243 places, 639 transitions, 9335 flow. Second operand 30 states and 3436 transitions. [2023-09-01 08:27:23,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 977 transitions, 14927 flow [2023-09-01 08:27:29,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 977 transitions, 14315 flow, removed 268 selfloop flow, removed 10 redundant places. [2023-09-01 08:27:29,782 INFO L231 Difference]: Finished difference. Result has 274 places, 762 transitions, 12379 flow [2023-09-01 08:27:29,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=8748, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=12379, PETRI_PLACES=274, PETRI_TRANSITIONS=762} [2023-09-01 08:27:29,798 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 236 predicate places. [2023-09-01 08:27:29,798 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 762 transitions, 12379 flow [2023-09-01 08:27:29,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 106.75) internal successors, (2989), 28 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:29,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:29,799 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:27:29,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-09-01 08:27:30,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:30,000 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:27:30,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:30,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1046601165, now seen corresponding path program 2 times [2023-09-01 08:27:30,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:30,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723310458] [2023-09-01 08:27:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:30,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:30,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:30,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723310458] [2023-09-01 08:27:30,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723310458] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:27:30,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972492557] [2023-09-01 08:27:30,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:27:30,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:30,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:27:30,785 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:27:30,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 08:27:30,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:27:30,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:27:30,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 08:27:30,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:27:31,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:27:31,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-09-01 08:27:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:27:31,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:27:31,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:27:31,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 73 [2023-09-01 08:27:31,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 10 [2023-09-01 08:27:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:27:31,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972492557] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:27:31,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:27:31,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-09-01 08:27:31,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189005586] [2023-09-01 08:27:31,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:27:31,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 08:27:31,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:27:31,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 08:27:31,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=610, Unknown=3, NotChecked=0, Total=702 [2023-09-01 08:27:32,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 299 [2023-09-01 08:27:32,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 762 transitions, 12379 flow. Second operand has 27 states, 27 states have (on average 112.77777777777777) internal successors, (3045), 27 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:32,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:27:32,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 299 [2023-09-01 08:27:32,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:27:35,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:27:46,083 INFO L130 PetriNetUnfolder]: 27027/43257 cut-off events. [2023-09-01 08:27:46,084 INFO L131 PetriNetUnfolder]: For 1027607/1027607 co-relation queries the response was YES. [2023-09-01 08:27:46,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269248 conditions, 43257 events. 27027/43257 cut-off events. For 1027607/1027607 co-relation queries the response was YES. Maximal size of possible extension queue 1909. Compared 342255 event pairs, 6698 based on Foata normal form. 1235/39615 useless extension candidates. Maximal degree in co-relation 269159. Up to 22980 conditions per place. [2023-09-01 08:27:46,686 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 722 selfloop transitions, 470 changer transitions 24/1218 dead transitions. [2023-09-01 08:27:46,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 1218 transitions, 21065 flow [2023-09-01 08:27:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 08:27:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 08:27:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3506 transitions. [2023-09-01 08:27:46,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40433629339176563 [2023-09-01 08:27:46,689 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3506 transitions. [2023-09-01 08:27:46,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3506 transitions. [2023-09-01 08:27:46,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:27:46,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3506 transitions. [2023-09-01 08:27:46,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 120.89655172413794) internal successors, (3506), 29 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:46,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 299.0) internal successors, (8970), 30 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:46,697 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 299.0) internal successors, (8970), 30 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:46,697 INFO L175 Difference]: Start difference. First operand has 274 places, 762 transitions, 12379 flow. Second operand 29 states and 3506 transitions. [2023-09-01 08:27:46,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 1218 transitions, 21065 flow [2023-09-01 08:28:00,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1218 transitions, 19888 flow, removed 575 selfloop flow, removed 8 redundant places. [2023-09-01 08:28:00,026 INFO L231 Difference]: Finished difference. Result has 302 places, 955 transitions, 16659 flow [2023-09-01 08:28:00,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=11285, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=16659, PETRI_PLACES=302, PETRI_TRANSITIONS=955} [2023-09-01 08:28:00,027 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 264 predicate places. [2023-09-01 08:28:00,027 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 955 transitions, 16659 flow [2023-09-01 08:28:00,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 112.77777777777777) internal successors, (3045), 27 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:00,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:28:00,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:28:00,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-09-01 08:28:00,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-09-01 08:28:00,232 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:28:00,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:28:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1823098230, now seen corresponding path program 2 times [2023-09-01 08:28:00,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:28:00,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62639371] [2023-09-01 08:28:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:28:00,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:28:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:28:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:00,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:28:00,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62639371] [2023-09-01 08:28:00,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62639371] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:28:00,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25139805] [2023-09-01 08:28:00,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:28:00,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:28:00,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:28:00,902 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:28:00,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 08:28:01,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:28:01,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:28:01,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 48 conjunts are in the unsatisfiable core [2023-09-01 08:28:01,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:28:01,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:28:01,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:28:01,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:28:01,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:28:01,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-09-01 08:28:01,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:28:01,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-09-01 08:28:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:01,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:28:02,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:28:02,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2023-09-01 08:28:02,571 INFO L321 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-09-01 08:28:02,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 987 treesize of output 915 [2023-09-01 08:28:02,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 180 [2023-09-01 08:28:02,608 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:28:02,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 144 [2023-09-01 08:28:02,654 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-09-01 08:28:02,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 97 [2023-09-01 08:28:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:04,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25139805] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:28:04,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:28:04,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 08:28:04,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732767244] [2023-09-01 08:28:04,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:28:04,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 08:28:04,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:04,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 08:28:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=847, Unknown=4, NotChecked=0, Total=992 [2023-09-01 08:28:06,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:06,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 299 [2023-09-01 08:28:06,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 955 transitions, 16659 flow. Second operand has 32 states, 32 states have (on average 95.5) internal successors, (3056), 32 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:06,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:06,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 299 [2023-09-01 08:28:06,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:28:15,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:22,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:24,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:28:47,631 WARN L222 SmtUtils]: Spent 18.62s on a formula simplification. DAG size of input: 138 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:29:07,903 WARN L222 SmtUtils]: Spent 18.56s on a formula simplification. DAG size of input: 128 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:29:13,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:29:34,534 WARN L222 SmtUtils]: Spent 20.66s on a formula simplification. DAG size of input: 142 DAG size of output: 105 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:29:38,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:29:54,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:29:56,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:29:58,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:30:04,239 INFO L130 PetriNetUnfolder]: 32217/51496 cut-off events. [2023-09-01 08:30:04,240 INFO L131 PetriNetUnfolder]: For 1453080/1453080 co-relation queries the response was YES. [2023-09-01 08:30:05,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349061 conditions, 51496 events. 32217/51496 cut-off events. For 1453080/1453080 co-relation queries the response was YES. Maximal size of possible extension queue 2155. Compared 412826 event pairs, 12599 based on Foata normal form. 1075/46379 useless extension candidates. Maximal degree in co-relation 348963. Up to 31199 conditions per place. [2023-09-01 08:30:05,754 INFO L137 encePairwiseOnDemand]: 283/299 looper letters, 1267 selfloop transitions, 373 changer transitions 12/1654 dead transitions. [2023-09-01 08:30:05,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1654 transitions, 30115 flow [2023-09-01 08:30:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-09-01 08:30:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-09-01 08:30:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 6631 transitions. [2023-09-01 08:30:05,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465196488294314 [2023-09-01 08:30:05,763 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 6631 transitions. [2023-09-01 08:30:05,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 6631 transitions. [2023-09-01 08:30:05,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:30:05,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 6631 transitions. [2023-09-01 08:30:05,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 103.609375) internal successors, (6631), 64 states have internal predecessors, (6631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:05,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 299.0) internal successors, (19435), 65 states have internal predecessors, (19435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:05,779 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 299.0) internal successors, (19435), 65 states have internal predecessors, (19435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:05,779 INFO L175 Difference]: Start difference. First operand has 302 places, 955 transitions, 16659 flow. Second operand 64 states and 6631 transitions. [2023-09-01 08:30:05,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1654 transitions, 30115 flow [2023-09-01 08:30:24,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1654 transitions, 29347 flow, removed 299 selfloop flow, removed 17 redundant places. [2023-09-01 08:30:24,627 INFO L231 Difference]: Finished difference. Result has 382 places, 1154 transitions, 23417 flow [2023-09-01 08:30:24,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=15584, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=23417, PETRI_PLACES=382, PETRI_TRANSITIONS=1154} [2023-09-01 08:30:24,628 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 344 predicate places. [2023-09-01 08:30:24,628 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 1154 transitions, 23417 flow [2023-09-01 08:30:24,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 95.5) internal successors, (3056), 32 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:24,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:30:24,629 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:30:24,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 08:30:24,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 08:30:24,833 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:30:24,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:30:24,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1898898306, now seen corresponding path program 3 times [2023-09-01 08:30:24,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:30:24,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65330714] [2023-09-01 08:30:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:30:24,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:30:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:30:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:30:25,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:30:25,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65330714] [2023-09-01 08:30:25,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65330714] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:30:25,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802431868] [2023-09-01 08:30:25,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:30:25,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:30:25,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:30:25,496 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:30:25,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 08:30:25,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:30:25,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:30:25,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 08:30:25,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:30:25,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:30:25,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 08:30:25,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:30:25,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-09-01 08:30:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:30:25,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:30:26,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:30:26,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 249 [2023-09-01 08:30:26,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 73 [2023-09-01 08:30:26,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:30:26,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 63 [2023-09-01 08:30:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:30:26,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802431868] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:30:26,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:30:26,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 27 [2023-09-01 08:30:26,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505741539] [2023-09-01 08:30:26,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:30:26,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 08:30:26,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:30:26,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 08:30:26,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=711, Unknown=12, NotChecked=0, Total=812 [2023-09-01 08:30:26,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-09-01 08:30:26,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 1154 transitions, 23417 flow. Second operand has 29 states, 29 states have (on average 98.62068965517241) internal successors, (2860), 29 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:30:26,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:30:26,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-09-01 08:30:26,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:30:34,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:30:40,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:07,531 WARN L222 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:31:11,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:22,160 WARN L222 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 80 DAG size of output: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:31:29,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:31:37,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:32:04,734 INFO L130 PetriNetUnfolder]: 55672/88317 cut-off events. [2023-09-01 08:32:04,734 INFO L131 PetriNetUnfolder]: For 7387694/7387694 co-relation queries the response was YES. [2023-09-01 08:32:07,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774209 conditions, 88317 events. 55672/88317 cut-off events. For 7387694/7387694 co-relation queries the response was YES. Maximal size of possible extension queue 3105. Compared 738638 event pairs, 7269 based on Foata normal form. 2849/80657 useless extension candidates. Maximal degree in co-relation 774076. Up to 41263 conditions per place. [2023-09-01 08:32:08,114 INFO L137 encePairwiseOnDemand]: 284/299 looper letters, 1011 selfloop transitions, 1530 changer transitions 35/2578 dead transitions. [2023-09-01 08:32:08,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 2578 transitions, 59007 flow [2023-09-01 08:32:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-09-01 08:32:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-09-01 08:32:08,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 6558 transitions. [2023-09-01 08:32:08,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3595591863589013 [2023-09-01 08:32:08,137 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 6558 transitions. [2023-09-01 08:32:08,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 6558 transitions. [2023-09-01 08:32:08,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:32:08,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 6558 transitions. [2023-09-01 08:32:08,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 107.50819672131148) internal successors, (6558), 61 states have internal predecessors, (6558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:08,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 299.0) internal successors, (18538), 62 states have internal predecessors, (18538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:08,164 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 299.0) internal successors, (18538), 62 states have internal predecessors, (18538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:32:08,164 INFO L175 Difference]: Start difference. First operand has 382 places, 1154 transitions, 23417 flow. Second operand 61 states and 6558 transitions. [2023-09-01 08:32:08,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 2578 transitions, 59007 flow [2023-09-01 08:33:47,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 2578 transitions, 48867 flow, removed 4994 selfloop flow, removed 12 redundant places. [2023-09-01 08:33:47,604 INFO L231 Difference]: Finished difference. Result has 467 places, 2025 transitions, 45619 flow [2023-09-01 08:33:47,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=18703, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=775, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=45619, PETRI_PLACES=467, PETRI_TRANSITIONS=2025} [2023-09-01 08:33:47,605 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 429 predicate places. [2023-09-01 08:33:47,605 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 2025 transitions, 45619 flow [2023-09-01 08:33:47,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 98.62068965517241) internal successors, (2860), 29 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:47,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:47,606 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:47,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:47,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 08:33:47,812 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:47,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1823098228, now seen corresponding path program 4 times [2023-09-01 08:33:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:47,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123332184] [2023-09-01 08:33:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:47,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:48,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:48,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123332184] [2023-09-01 08:33:48,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123332184] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:48,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806457882] [2023-09-01 08:33:48,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:33:48,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:48,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:48,381 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:48,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 08:33:48,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:33:48,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:48,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 48 conjunts are in the unsatisfiable core [2023-09-01 08:33:48,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:48,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:48,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2023-09-01 08:33:49,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:49,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2023-09-01 08:33:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:49,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:49,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:49,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 503 treesize of output 422 [2023-09-01 08:33:49,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:49,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 68 [2023-09-01 08:33:49,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 26 [2023-09-01 08:33:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:49,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806457882] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:49,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:49,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 08:33:49,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494746385] [2023-09-01 08:33:49,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:49,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 08:33:49,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:49,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 08:33:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=844, Unknown=3, NotChecked=0, Total=992 [2023-09-01 08:33:50,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-09-01 08:33:50,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 2025 transitions, 45619 flow. Second operand has 32 states, 32 states have (on average 98.5) internal successors, (3152), 32 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:50,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:50,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-09-01 08:33:50,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:34:03,276 WARN L222 SmtUtils]: Spent 8.45s on a formula simplification. DAG size of input: 74 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:34:06,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:34:15,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:34:59,059 INFO L130 PetriNetUnfolder]: 55701/89452 cut-off events. [2023-09-01 08:34:59,059 INFO L131 PetriNetUnfolder]: For 5877864/5877864 co-relation queries the response was YES. [2023-09-01 08:35:02,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820451 conditions, 89452 events. 55701/89452 cut-off events. For 5877864/5877864 co-relation queries the response was YES. Maximal size of possible extension queue 3196. Compared 768451 event pairs, 20555 based on Foata normal form. 682/79237 useless extension candidates. Maximal degree in co-relation 820285. Up to 77292 conditions per place. [2023-09-01 08:35:03,230 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 1924 selfloop transitions, 297 changer transitions 10/2233 dead transitions. [2023-09-01 08:35:03,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 2233 transitions, 53868 flow [2023-09-01 08:35:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 08:35:03,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 08:35:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2853 transitions. [2023-09-01 08:35:03,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3534002229654404 [2023-09-01 08:35:03,235 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2853 transitions. [2023-09-01 08:35:03,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2853 transitions. [2023-09-01 08:35:03,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:35:03,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2853 transitions. [2023-09-01 08:35:03,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 105.66666666666667) internal successors, (2853), 27 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:03,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 299.0) internal successors, (8372), 28 states have internal predecessors, (8372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:03,253 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 299.0) internal successors, (8372), 28 states have internal predecessors, (8372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:35:03,254 INFO L175 Difference]: Start difference. First operand has 467 places, 2025 transitions, 45619 flow. Second operand 27 states and 2853 transitions. [2023-09-01 08:35:03,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 2233 transitions, 53868 flow Killed by 15