/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.error.function.in.sv-comp.mode false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-53ca081-m [2022-09-16 12:00:28,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-16 12:00:28,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-16 12:00:28,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-16 12:00:28,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-16 12:00:28,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-16 12:00:28,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-16 12:00:28,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-16 12:00:28,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-16 12:00:28,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-16 12:00:28,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-16 12:00:28,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-16 12:00:28,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-16 12:00:28,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-16 12:00:28,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-16 12:00:28,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-16 12:00:28,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-16 12:00:28,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-16 12:00:28,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-16 12:00:28,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-16 12:00:28,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-16 12:00:28,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-16 12:00:28,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-16 12:00:28,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-16 12:00:28,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-16 12:00:28,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-16 12:00:28,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-16 12:00:28,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-16 12:00:28,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-16 12:00:28,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-16 12:00:28,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-16 12:00:28,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-16 12:00:28,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-16 12:00:28,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-16 12:00:28,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-16 12:00:28,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-16 12:00:28,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-16 12:00:28,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-16 12:00:28,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-16 12:00:28,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-16 12:00:28,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-16 12:00:28,967 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-09-16 12:00:28,995 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-16 12:00:28,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-16 12:00:28,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-16 12:00:28,996 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-16 12:00:28,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-16 12:00:28,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-16 12:00:28,996 INFO L138 SettingsManager]: * Use SBE=true [2022-09-16 12:00:28,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-16 12:00:28,997 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-16 12:00:28,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-16 12:00:28,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-16 12:00:28,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-16 12:00:28,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-16 12:00:28,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-16 12:00:28,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-16 12:00:28,998 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-16 12:00:28,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-16 12:00:28,998 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-16 12:00:28,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-16 12:00:28,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-16 12:00:28,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-16 12:00:28,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-16 12:00:28,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-16 12:00:28,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 12:00:28,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-16 12:00:28,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-16 12:00:28,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-16 12:00:29,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-16 12:00:29,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-16 12:00:29,000 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-16 12:00:29,000 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-16 12:00:29,000 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of error function in SV-COMP mode -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2022-09-16 12:00:29,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-16 12:00:29,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-16 12:00:29,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-16 12:00:29,286 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-16 12:00:29,287 INFO L275 PluginConnector]: CDTParser initialized [2022-09-16 12:00:29,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2022-09-16 12:00:29,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cadf2c25a/224a1bbf1b1246ca99018d7a68c79ebb/FLAG6b1e01cfb [2022-09-16 12:00:29,761 INFO L306 CDTParser]: Found 1 translation units. [2022-09-16 12:00:29,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2022-09-16 12:00:29,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cadf2c25a/224a1bbf1b1246ca99018d7a68c79ebb/FLAG6b1e01cfb [2022-09-16 12:00:29,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cadf2c25a/224a1bbf1b1246ca99018d7a68c79ebb [2022-09-16 12:00:29,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-16 12:00:29,780 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-16 12:00:29,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-16 12:00:29,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-16 12:00:29,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-16 12:00:29,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 12:00:29" (1/1) ... [2022-09-16 12:00:29,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd6fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:29, skipping insertion in model container [2022-09-16 12:00:29,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 12:00:29" (1/1) ... [2022-09-16 12:00:29,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-16 12:00:29,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-16 12:00:29,985 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-09-16 12:00:29,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 12:00:29,997 INFO L203 MainTranslator]: Completed pre-run [2022-09-16 12:00:30,013 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-09-16 12:00:30,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 12:00:30,027 INFO L208 MainTranslator]: Completed translation [2022-09-16 12:00:30,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:30 WrapperNode [2022-09-16 12:00:30,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-16 12:00:30,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-16 12:00:30,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-16 12:00:30,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-16 12:00:30,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:30" (1/1) ... [2022-09-16 12:00:30,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:30" (1/1) ... [2022-09-16 12:00:30,064 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 152 [2022-09-16 12:00:30,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-16 12:00:30,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-16 12:00:30,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-16 12:00:30,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-16 12:00:30,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:30" (1/1) ... [2022-09-16 12:00:30,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:30" (1/1) ... [2022-09-16 12:00:30,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:30" (1/1) ... [2022-09-16 12:00:30,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:30" (1/1) ... [2022-09-16 12:00:30,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:30" (1/1) ... [2022-09-16 12:00:30,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:30" (1/1) ... [2022-09-16 12:00:30,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:30" (1/1) ... [2022-09-16 12:00:30,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-16 12:00:30,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-16 12:00:30,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-16 12:00:30,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-16 12:00:30,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:30" (1/1) ... [2022-09-16 12:00:30,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 12:00:30,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:30,137 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) [2022-09-16 12:00:30,144 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 [2022-09-16 12:00:30,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-16 12:00:30,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-16 12:00:30,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-16 12:00:30,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-16 12:00:30,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-16 12:00:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-16 12:00:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-16 12:00:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-16 12:00:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-16 12:00:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-16 12:00:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-09-16 12:00:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-16 12:00:30,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-16 12:00:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-16 12:00:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-16 12:00:30,174 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-16 12:00:30,254 INFO L234 CfgBuilder]: Building ICFG [2022-09-16 12:00:30,256 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-16 12:00:30,540 INFO L275 CfgBuilder]: Performing block encoding [2022-09-16 12:00:30,675 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-16 12:00:30,675 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-09-16 12:00:30,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 12:00:30 BoogieIcfgContainer [2022-09-16 12:00:30,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-16 12:00:30,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-16 12:00:30,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-16 12:00:30,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-16 12:00:30,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 12:00:29" (1/3) ... [2022-09-16 12:00:30,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8599ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 12:00:30, skipping insertion in model container [2022-09-16 12:00:30,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 12:00:30" (2/3) ... [2022-09-16 12:00:30,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8599ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 12:00:30, skipping insertion in model container [2022-09-16 12:00:30,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 12:00:30" (3/3) ... [2022-09-16 12:00:30,687 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-09-16 12:00:30,705 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-16 12:00:30,705 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-09-16 12:00:30,705 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-16 12:00:30,808 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-16 12:00:30,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 304 flow [2022-09-16 12:00:30,917 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2022-09-16 12:00:30,917 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-16 12:00:30,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-09-16 12:00:30,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 304 flow [2022-09-16 12:00:30,930 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 123 transitions, 255 flow [2022-09-16 12:00:30,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 12:00:30,950 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=false, 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;@618d8242, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 12:00:30,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-09-16 12:00:30,975 INFO L130 PetriNetUnfolder]: 3/63 cut-off events. [2022-09-16 12:00:30,976 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 12:00:30,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:30,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:30,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:30,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:30,982 INFO L85 PathProgramCache]: Analyzing trace with hash 45377837, now seen corresponding path program 1 times [2022-09-16 12:00:30,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:30,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094287884] [2022-09-16 12:00:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:30,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:31,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094287884] [2022-09-16 12:00:31,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094287884] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:31,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:31,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:00:31,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953146120] [2022-09-16 12:00:31,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:31,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:00:31,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:31,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:00:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:00:31,281 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 144 [2022-09-16 12:00:31,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 123 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 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) [2022-09-16 12:00:31,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:31,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 144 [2022-09-16 12:00:31,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:31,514 INFO L130 PetriNetUnfolder]: 73/312 cut-off events. [2022-09-16 12:00:31,515 INFO L131 PetriNetUnfolder]: For 52/58 co-relation queries the response was YES. [2022-09-16 12:00:31,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 312 events. 73/312 cut-off events. For 52/58 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1179 event pairs, 46 based on Foata normal form. 28/222 useless extension candidates. Maximal degree in co-relation 164. Up to 82 conditions per place. [2022-09-16 12:00:31,522 INFO L137 encePairwiseOnDemand]: 131/144 looper letters, 42 selfloop transitions, 4 changer transitions 2/137 dead transitions. [2022-09-16 12:00:31,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 137 transitions, 384 flow [2022-09-16 12:00:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:00:31,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:00:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2022-09-16 12:00:31,560 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8402777777777778 [2022-09-16 12:00:31,560 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2022-09-16 12:00:31,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2022-09-16 12:00:31,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:31,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2022-09-16 12:00:31,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:31,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:31,588 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:31,590 INFO L175 Difference]: Start difference. First operand has 120 places, 123 transitions, 255 flow. Second operand 5 states and 605 transitions. [2022-09-16 12:00:31,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 137 transitions, 384 flow [2022-09-16 12:00:31,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 137 transitions, 374 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 12:00:31,599 INFO L231 Difference]: Finished difference. Result has 123 places, 117 transitions, 262 flow [2022-09-16 12:00:31,602 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=123, PETRI_TRANSITIONS=117} [2022-09-16 12:00:31,606 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 3 predicate places. [2022-09-16 12:00:31,607 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 117 transitions, 262 flow [2022-09-16 12:00:31,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 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) [2022-09-16 12:00:31,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:31,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:31,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-16 12:00:31,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:31,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:31,610 INFO L85 PathProgramCache]: Analyzing trace with hash -696994825, now seen corresponding path program 1 times [2022-09-16 12:00:31,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:31,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126641860] [2022-09-16 12:00:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:31,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:31,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126641860] [2022-09-16 12:00:31,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126641860] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:31,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:31,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-16 12:00:31,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361647844] [2022-09-16 12:00:31,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:31,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-16 12:00:31,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:31,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-16 12:00:31,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 12:00:31,785 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 144 [2022-09-16 12:00:31,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 117 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:31,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:31,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 144 [2022-09-16 12:00:31,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:31,891 INFO L130 PetriNetUnfolder]: 89/402 cut-off events. [2022-09-16 12:00:31,892 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-09-16 12:00:31,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 402 events. 89/402 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1729 event pairs, 40 based on Foata normal form. 14/284 useless extension candidates. Maximal degree in co-relation 319. Up to 142 conditions per place. [2022-09-16 12:00:31,904 INFO L137 encePairwiseOnDemand]: 137/144 looper letters, 23 selfloop transitions, 3 changer transitions 0/125 dead transitions. [2022-09-16 12:00:31,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 125 transitions, 331 flow [2022-09-16 12:00:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-16 12:00:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-16 12:00:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2022-09-16 12:00:31,906 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.875 [2022-09-16 12:00:31,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2022-09-16 12:00:31,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2022-09-16 12:00:31,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:31,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2022-09-16 12:00:31,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:31,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:31,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:31,910 INFO L175 Difference]: Start difference. First operand has 123 places, 117 transitions, 262 flow. Second operand 3 states and 378 transitions. [2022-09-16 12:00:31,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 125 transitions, 331 flow [2022-09-16 12:00:31,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 125 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:00:31,916 INFO L231 Difference]: Finished difference. Result has 123 places, 119 transitions, 285 flow [2022-09-16 12:00:31,916 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=123, PETRI_TRANSITIONS=119} [2022-09-16 12:00:31,917 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 3 predicate places. [2022-09-16 12:00:31,917 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 119 transitions, 285 flow [2022-09-16 12:00:31,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:31,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:31,918 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:31,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-16 12:00:31,918 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:31,920 INFO L85 PathProgramCache]: Analyzing trace with hash -778668931, now seen corresponding path program 1 times [2022-09-16 12:00:31,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:31,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512037892] [2022-09-16 12:00:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:31,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:32,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:32,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512037892] [2022-09-16 12:00:32,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512037892] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:00:32,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507372664] [2022-09-16 12:00:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:32,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:32,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:32,009 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) [2022-09-16 12:00:32,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-16 12:00:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:32,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:00:32,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:00:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:32,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:00:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:32,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507372664] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:00:32,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:00:32,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-09-16 12:00:32,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919073776] [2022-09-16 12:00:32,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:00:32,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-16 12:00:32,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:32,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-16 12:00:32,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-09-16 12:00:32,254 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 144 [2022-09-16 12:00:32,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 119 transitions, 285 flow. Second operand has 12 states, 12 states have (on average 111.66666666666667) internal successors, (1340), 12 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:32,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:32,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 144 [2022-09-16 12:00:32,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:32,636 INFO L130 PetriNetUnfolder]: 191/842 cut-off events. [2022-09-16 12:00:32,636 INFO L131 PetriNetUnfolder]: For 150/300 co-relation queries the response was YES. [2022-09-16 12:00:32,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 842 events. 191/842 cut-off events. For 150/300 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4747 event pairs, 105 based on Foata normal form. 3/560 useless extension candidates. Maximal degree in co-relation 548. Up to 171 conditions per place. [2022-09-16 12:00:32,675 INFO L137 encePairwiseOnDemand]: 137/144 looper letters, 103 selfloop transitions, 18 changer transitions 0/210 dead transitions. [2022-09-16 12:00:32,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 210 transitions, 819 flow [2022-09-16 12:00:32,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-09-16 12:00:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-09-16 12:00:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2076 transitions. [2022-09-16 12:00:32,680 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8009259259259259 [2022-09-16 12:00:32,680 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2076 transitions. [2022-09-16 12:00:32,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2076 transitions. [2022-09-16 12:00:32,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:32,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2076 transitions. [2022-09-16 12:00:32,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 115.33333333333333) internal successors, (2076), 18 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:32,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:32,695 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:32,695 INFO L175 Difference]: Start difference. First operand has 123 places, 119 transitions, 285 flow. Second operand 18 states and 2076 transitions. [2022-09-16 12:00:32,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 210 transitions, 819 flow [2022-09-16 12:00:32,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 210 transitions, 808 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:00:32,703 INFO L231 Difference]: Finished difference. Result has 143 places, 131 transitions, 388 flow [2022-09-16 12:00:32,703 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=388, PETRI_PLACES=143, PETRI_TRANSITIONS=131} [2022-09-16 12:00:32,705 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 23 predicate places. [2022-09-16 12:00:32,705 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 131 transitions, 388 flow [2022-09-16 12:00:32,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 111.66666666666667) internal successors, (1340), 12 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:32,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:32,706 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:32,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-16 12:00:32,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:32,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:32,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:32,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1631067334, now seen corresponding path program 1 times [2022-09-16 12:00:32,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:32,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774344243] [2022-09-16 12:00:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:32,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:32,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:32,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774344243] [2022-09-16 12:00:32,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774344243] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:00:32,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101393048] [2022-09-16 12:00:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:32,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:32,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:32,992 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) [2022-09-16 12:00:32,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-16 12:00:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:33,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 12:00:33,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:00:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:33,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:00:33,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101393048] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:33,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:00:33,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 12:00:33,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943479178] [2022-09-16 12:00:33,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:33,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 12:00:33,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:33,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 12:00:33,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 12:00:33,113 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 144 [2022-09-16 12:00:33,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 131 transitions, 388 flow. Second operand has 6 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:33,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:33,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 144 [2022-09-16 12:00:33,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:33,331 INFO L130 PetriNetUnfolder]: 191/838 cut-off events. [2022-09-16 12:00:33,332 INFO L131 PetriNetUnfolder]: For 187/337 co-relation queries the response was YES. [2022-09-16 12:00:33,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1492 conditions, 838 events. 191/838 cut-off events. For 187/337 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4689 event pairs, 105 based on Foata normal form. 4/557 useless extension candidates. Maximal degree in co-relation 1177. Up to 312 conditions per place. [2022-09-16 12:00:33,339 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 47 selfloop transitions, 11 changer transitions 0/147 dead transitions. [2022-09-16 12:00:33,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 147 transitions, 539 flow [2022-09-16 12:00:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:00:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:00:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 809 transitions. [2022-09-16 12:00:33,342 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8025793650793651 [2022-09-16 12:00:33,342 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 809 transitions. [2022-09-16 12:00:33,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 809 transitions. [2022-09-16 12:00:33,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:33,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 809 transitions. [2022-09-16 12:00:33,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:33,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:33,349 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:33,349 INFO L175 Difference]: Start difference. First operand has 143 places, 131 transitions, 388 flow. Second operand 7 states and 809 transitions. [2022-09-16 12:00:33,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 147 transitions, 539 flow [2022-09-16 12:00:33,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 147 transitions, 507 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-09-16 12:00:33,359 INFO L231 Difference]: Finished difference. Result has 139 places, 127 transitions, 351 flow [2022-09-16 12:00:33,360 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=351, PETRI_PLACES=139, PETRI_TRANSITIONS=127} [2022-09-16 12:00:33,361 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 19 predicate places. [2022-09-16 12:00:33,361 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 127 transitions, 351 flow [2022-09-16 12:00:33,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:33,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:33,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:33,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-16 12:00:33,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-09-16 12:00:33,586 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:33,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:33,586 INFO L85 PathProgramCache]: Analyzing trace with hash 62535940, now seen corresponding path program 1 times [2022-09-16 12:00:33,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:33,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740939097] [2022-09-16 12:00:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:33,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:33,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:33,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740939097] [2022-09-16 12:00:33,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740939097] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:33,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:33,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:00:33,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968857040] [2022-09-16 12:00:33,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:33,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-16 12:00:33,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:33,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-16 12:00:33,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 12:00:33,638 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 144 [2022-09-16 12:00:33,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 127 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:33,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:33,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 144 [2022-09-16 12:00:33,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:33,827 INFO L130 PetriNetUnfolder]: 281/1188 cut-off events. [2022-09-16 12:00:33,827 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-09-16 12:00:33,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2054 conditions, 1188 events. 281/1188 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7808 event pairs, 20 based on Foata normal form. 0/893 useless extension candidates. Maximal degree in co-relation 1633. Up to 466 conditions per place. [2022-09-16 12:00:33,834 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 25 selfloop transitions, 2 changer transitions 0/135 dead transitions. [2022-09-16 12:00:33,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 135 transitions, 428 flow [2022-09-16 12:00:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-16 12:00:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-16 12:00:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2022-09-16 12:00:33,837 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8773148148148148 [2022-09-16 12:00:33,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2022-09-16 12:00:33,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2022-09-16 12:00:33,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:33,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2022-09-16 12:00:33,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:33,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:33,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:33,840 INFO L175 Difference]: Start difference. First operand has 139 places, 127 transitions, 351 flow. Second operand 3 states and 379 transitions. [2022-09-16 12:00:33,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 135 transitions, 428 flow [2022-09-16 12:00:33,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 135 transitions, 414 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-09-16 12:00:33,844 INFO L231 Difference]: Finished difference. Result has 137 places, 127 transitions, 345 flow [2022-09-16 12:00:33,844 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=345, PETRI_PLACES=137, PETRI_TRANSITIONS=127} [2022-09-16 12:00:33,846 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 17 predicate places. [2022-09-16 12:00:33,847 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 127 transitions, 345 flow [2022-09-16 12:00:33,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:33,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:33,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:33,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-16 12:00:33,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:33,848 INFO L85 PathProgramCache]: Analyzing trace with hash 62535906, now seen corresponding path program 1 times [2022-09-16 12:00:33,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:33,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194987376] [2022-09-16 12:00:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:33,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:34,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:34,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194987376] [2022-09-16 12:00:34,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194987376] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:34,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:34,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-09-16 12:00:34,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126617207] [2022-09-16 12:00:34,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:34,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-09-16 12:00:34,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:34,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-09-16 12:00:34,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-09-16 12:00:34,072 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 144 [2022-09-16 12:00:34,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 127 transitions, 345 flow. Second operand has 9 states, 9 states have (on average 102.11111111111111) internal successors, (919), 9 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:34,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 144 [2022-09-16 12:00:34,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:34,407 INFO L130 PetriNetUnfolder]: 305/1263 cut-off events. [2022-09-16 12:00:34,407 INFO L131 PetriNetUnfolder]: For 241/241 co-relation queries the response was YES. [2022-09-16 12:00:34,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2322 conditions, 1263 events. 305/1263 cut-off events. For 241/241 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 8533 event pairs, 153 based on Foata normal form. 10/990 useless extension candidates. Maximal degree in co-relation 1844. Up to 433 conditions per place. [2022-09-16 12:00:34,417 INFO L137 encePairwiseOnDemand]: 125/144 looper letters, 53 selfloop transitions, 16 changer transitions 4/157 dead transitions. [2022-09-16 12:00:34,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 157 transitions, 571 flow [2022-09-16 12:00:34,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-09-16 12:00:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-09-16 12:00:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1172 transitions. [2022-09-16 12:00:34,420 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.73989898989899 [2022-09-16 12:00:34,421 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1172 transitions. [2022-09-16 12:00:34,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1172 transitions. [2022-09-16 12:00:34,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:34,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1172 transitions. [2022-09-16 12:00:34,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 106.54545454545455) internal successors, (1172), 11 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,428 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,428 INFO L175 Difference]: Start difference. First operand has 137 places, 127 transitions, 345 flow. Second operand 11 states and 1172 transitions. [2022-09-16 12:00:34,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 157 transitions, 571 flow [2022-09-16 12:00:34,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 157 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 12:00:34,433 INFO L231 Difference]: Finished difference. Result has 151 places, 134 transitions, 427 flow [2022-09-16 12:00:34,433 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=427, PETRI_PLACES=151, PETRI_TRANSITIONS=134} [2022-09-16 12:00:34,435 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 31 predicate places. [2022-09-16 12:00:34,435 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 134 transitions, 427 flow [2022-09-16 12:00:34,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 102.11111111111111) internal successors, (919), 9 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:34,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:34,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-09-16 12:00:34,437 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:34,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash 62535907, now seen corresponding path program 1 times [2022-09-16 12:00:34,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:34,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077311715] [2022-09-16 12:00:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:34,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:34,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:34,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077311715] [2022-09-16 12:00:34,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077311715] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:34,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:34,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-16 12:00:34,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429817805] [2022-09-16 12:00:34,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:34,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-16 12:00:34,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-16 12:00:34,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-16 12:00:34,483 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 144 [2022-09-16 12:00:34,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 134 transitions, 427 flow. Second operand has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:34,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 144 [2022-09-16 12:00:34,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:34,604 INFO L130 PetriNetUnfolder]: 150/733 cut-off events. [2022-09-16 12:00:34,604 INFO L131 PetriNetUnfolder]: For 434/735 co-relation queries the response was YES. [2022-09-16 12:00:34,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510 conditions, 733 events. 150/733 cut-off events. For 434/735 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3813 event pairs, 94 based on Foata normal form. 31/599 useless extension candidates. Maximal degree in co-relation 1196. Up to 306 conditions per place. [2022-09-16 12:00:34,610 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 18 selfloop transitions, 4 changer transitions 0/130 dead transitions. [2022-09-16 12:00:34,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 130 transitions, 452 flow [2022-09-16 12:00:34,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:00:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:00:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2022-09-16 12:00:34,613 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8138888888888889 [2022-09-16 12:00:34,613 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2022-09-16 12:00:34,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2022-09-16 12:00:34,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:34,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2022-09-16 12:00:34,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,617 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,617 INFO L175 Difference]: Start difference. First operand has 151 places, 134 transitions, 427 flow. Second operand 5 states and 586 transitions. [2022-09-16 12:00:34,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 130 transitions, 452 flow [2022-09-16 12:00:34,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 130 transitions, 447 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-16 12:00:34,620 INFO L231 Difference]: Finished difference. Result has 150 places, 130 transitions, 411 flow [2022-09-16 12:00:34,621 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=411, PETRI_PLACES=150, PETRI_TRANSITIONS=130} [2022-09-16 12:00:34,621 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 30 predicate places. [2022-09-16 12:00:34,621 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 130 transitions, 411 flow [2022-09-16 12:00:34,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:34,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:34,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-09-16 12:00:34,622 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:34,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:34,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1008127265, now seen corresponding path program 1 times [2022-09-16 12:00:34,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:34,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429666207] [2022-09-16 12:00:34,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:34,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:34,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429666207] [2022-09-16 12:00:34,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429666207] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:34,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:34,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:00:34,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788011851] [2022-09-16 12:00:34,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:34,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:00:34,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:00:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:00:34,663 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 144 [2022-09-16 12:00:34,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 130 transitions, 411 flow. Second operand has 4 states, 4 states have (on average 118.25) internal successors, (473), 4 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:34,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 144 [2022-09-16 12:00:34,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:34,851 INFO L130 PetriNetUnfolder]: 260/1213 cut-off events. [2022-09-16 12:00:34,852 INFO L131 PetriNetUnfolder]: For 430/701 co-relation queries the response was YES. [2022-09-16 12:00:34,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 1213 events. 260/1213 cut-off events. For 430/701 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 7813 event pairs, 109 based on Foata normal form. 1/944 useless extension candidates. Maximal degree in co-relation 2508. Up to 286 conditions per place. [2022-09-16 12:00:34,862 INFO L137 encePairwiseOnDemand]: 137/144 looper letters, 20 selfloop transitions, 8 changer transitions 0/139 dead transitions. [2022-09-16 12:00:34,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 139 transitions, 506 flow [2022-09-16 12:00:34,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:00:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:00:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2022-09-16 12:00:34,864 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8416666666666667 [2022-09-16 12:00:34,864 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 606 transitions. [2022-09-16 12:00:34,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 606 transitions. [2022-09-16 12:00:34,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:34,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 606 transitions. [2022-09-16 12:00:34,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,868 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,868 INFO L175 Difference]: Start difference. First operand has 150 places, 130 transitions, 411 flow. Second operand 5 states and 606 transitions. [2022-09-16 12:00:34,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 139 transitions, 506 flow [2022-09-16 12:00:34,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 139 transitions, 498 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-16 12:00:34,872 INFO L231 Difference]: Finished difference. Result has 152 places, 133 transitions, 452 flow [2022-09-16 12:00:34,873 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=152, PETRI_TRANSITIONS=133} [2022-09-16 12:00:34,873 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 32 predicate places. [2022-09-16 12:00:34,873 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 133 transitions, 452 flow [2022-09-16 12:00:34,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.25) internal successors, (473), 4 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:34,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:34,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-09-16 12:00:34,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:34,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:34,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1008127266, now seen corresponding path program 1 times [2022-09-16 12:00:34,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:34,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002111182] [2022-09-16 12:00:34,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:34,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:34,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:34,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002111182] [2022-09-16 12:00:34,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002111182] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:34,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:34,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-16 12:00:34,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746552622] [2022-09-16 12:00:34,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:34,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 12:00:34,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:34,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 12:00:34,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-09-16 12:00:34,932 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 144 [2022-09-16 12:00:34,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 133 transitions, 452 flow. Second operand has 6 states, 6 states have (on average 108.5) internal successors, (651), 6 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:34,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:34,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 144 [2022-09-16 12:00:34,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:35,137 INFO L130 PetriNetUnfolder]: 214/1098 cut-off events. [2022-09-16 12:00:35,137 INFO L131 PetriNetUnfolder]: For 958/1231 co-relation queries the response was YES. [2022-09-16 12:00:35,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2443 conditions, 1098 events. 214/1098 cut-off events. For 958/1231 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 6870 event pairs, 126 based on Foata normal form. 11/958 useless extension candidates. Maximal degree in co-relation 2180. Up to 449 conditions per place. [2022-09-16 12:00:35,147 INFO L137 encePairwiseOnDemand]: 134/144 looper letters, 44 selfloop transitions, 7 changer transitions 0/143 dead transitions. [2022-09-16 12:00:35,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 143 transitions, 590 flow [2022-09-16 12:00:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 12:00:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 12:00:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 784 transitions. [2022-09-16 12:00:35,150 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-09-16 12:00:35,150 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 784 transitions. [2022-09-16 12:00:35,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 784 transitions. [2022-09-16 12:00:35,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:35,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 784 transitions. [2022-09-16 12:00:35,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:35,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:35,154 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:35,155 INFO L175 Difference]: Start difference. First operand has 152 places, 133 transitions, 452 flow. Second operand 7 states and 784 transitions. [2022-09-16 12:00:35,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 143 transitions, 590 flow [2022-09-16 12:00:35,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 143 transitions, 585 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-16 12:00:35,160 INFO L231 Difference]: Finished difference. Result has 157 places, 133 transitions, 468 flow [2022-09-16 12:00:35,160 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=468, PETRI_PLACES=157, PETRI_TRANSITIONS=133} [2022-09-16 12:00:35,161 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 37 predicate places. [2022-09-16 12:00:35,161 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 133 transitions, 468 flow [2022-09-16 12:00:35,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.5) internal successors, (651), 6 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:35,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:35,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:35,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-09-16 12:00:35,162 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2129092498, now seen corresponding path program 1 times [2022-09-16 12:00:35,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:35,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773162166] [2022-09-16 12:00:35,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:35,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:35,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:35,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773162166] [2022-09-16 12:00:35,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773162166] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:00:35,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968860663] [2022-09-16 12:00:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:35,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:35,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:35,381 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) [2022-09-16 12:00:35,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-16 12:00:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-16 12:00:35,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:00:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:00:35,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 12:00:35,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968860663] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:35,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 12:00:35,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-09-16 12:00:35,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803374135] [2022-09-16 12:00:35,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:35,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-16 12:00:35,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-16 12:00:35,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-09-16 12:00:35,667 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 144 [2022-09-16 12:00:35,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 133 transitions, 468 flow. Second operand has 7 states, 7 states have (on average 110.14285714285714) internal successors, (771), 7 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:35,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:35,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 144 [2022-09-16 12:00:35,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:35,963 INFO L130 PetriNetUnfolder]: 267/1063 cut-off events. [2022-09-16 12:00:35,963 INFO L131 PetriNetUnfolder]: For 1396/1396 co-relation queries the response was YES. [2022-09-16 12:00:35,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 1063 events. 267/1063 cut-off events. For 1396/1396 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6642 event pairs, 18 based on Foata normal form. 76/1048 useless extension candidates. Maximal degree in co-relation 2421. Up to 247 conditions per place. [2022-09-16 12:00:35,973 INFO L137 encePairwiseOnDemand]: 131/144 looper letters, 27 selfloop transitions, 13 changer transitions 5/145 dead transitions. [2022-09-16 12:00:35,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 145 transitions, 659 flow [2022-09-16 12:00:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-16 12:00:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-16 12:00:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1011 transitions. [2022-09-16 12:00:35,977 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7800925925925926 [2022-09-16 12:00:35,977 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1011 transitions. [2022-09-16 12:00:35,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1011 transitions. [2022-09-16 12:00:35,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:35,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1011 transitions. [2022-09-16 12:00:35,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:35,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:35,983 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:35,983 INFO L175 Difference]: Start difference. First operand has 157 places, 133 transitions, 468 flow. Second operand 9 states and 1011 transitions. [2022-09-16 12:00:35,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 145 transitions, 659 flow [2022-09-16 12:00:35,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 145 transitions, 612 flow, removed 16 selfloop flow, removed 6 redundant places. [2022-09-16 12:00:35,989 INFO L231 Difference]: Finished difference. Result has 156 places, 125 transitions, 423 flow [2022-09-16 12:00:35,990 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=423, PETRI_PLACES=156, PETRI_TRANSITIONS=125} [2022-09-16 12:00:35,990 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 36 predicate places. [2022-09-16 12:00:35,990 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 125 transitions, 423 flow [2022-09-16 12:00:35,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.14285714285714) internal successors, (771), 7 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:35,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:35,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:36,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-16 12:00:36,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:36,222 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:36,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:36,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2028117293, now seen corresponding path program 1 times [2022-09-16 12:00:36,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:36,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658440434] [2022-09-16 12:00:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:36,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:36,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658440434] [2022-09-16 12:00:36,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658440434] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:00:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101033331] [2022-09-16 12:00:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:36,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:36,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:36,928 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) [2022-09-16 12:00:36,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-16 12:00:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:37,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 46 conjunts are in the unsatisfiable core [2022-09-16 12:00:37,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:00:37,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-09-16 12:00:37,385 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-09-16 12:00:37,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-09-16 12:00:37,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-09-16 12:00:37,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-09-16 12:00:37,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-16 12:00:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:38,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:00:39,020 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-16 12:00:39,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 50 [2022-09-16 12:00:39,032 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-16 12:00:39,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 148 treesize of output 144 [2022-09-16 12:00:39,043 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-16 12:00:39,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 132 treesize of output 120 [2022-09-16 12:00:39,055 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-16 12:00:39,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 83 treesize of output 83 [2022-09-16 12:00:39,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-09-16 12:00:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:40,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101033331] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:00:40,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:00:40,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 55 [2022-09-16 12:00:40,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917270319] [2022-09-16 12:00:40,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:00:40,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-09-16 12:00:40,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:40,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-09-16 12:00:40,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=2553, Unknown=23, NotChecked=0, Total=3080 [2022-09-16 12:00:40,038 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2022-09-16 12:00:40,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 125 transitions, 423 flow. Second operand has 56 states, 56 states have (on average 70.25) internal successors, (3934), 56 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:40,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:40,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2022-09-16 12:00:40,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:44,367 INFO L130 PetriNetUnfolder]: 550/2315 cut-off events. [2022-09-16 12:00:44,367 INFO L131 PetriNetUnfolder]: For 3307/3523 co-relation queries the response was YES. [2022-09-16 12:00:44,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5735 conditions, 2315 events. 550/2315 cut-off events. For 3307/3523 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 17659 event pairs, 58 based on Foata normal form. 14/2125 useless extension candidates. Maximal degree in co-relation 5601. Up to 507 conditions per place. [2022-09-16 12:00:44,393 INFO L137 encePairwiseOnDemand]: 115/144 looper letters, 113 selfloop transitions, 49 changer transitions 10/226 dead transitions. [2022-09-16 12:00:44,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 226 transitions, 1283 flow [2022-09-16 12:00:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-09-16 12:00:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-09-16 12:00:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2749 transitions. [2022-09-16 12:00:44,423 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.502375730994152 [2022-09-16 12:00:44,423 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2749 transitions. [2022-09-16 12:00:44,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2749 transitions. [2022-09-16 12:00:44,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:44,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2749 transitions. [2022-09-16 12:00:44,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 72.34210526315789) internal successors, (2749), 38 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:44,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 144.0) internal successors, (5616), 39 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:44,441 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 144.0) internal successors, (5616), 39 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:44,441 INFO L175 Difference]: Start difference. First operand has 156 places, 125 transitions, 423 flow. Second operand 38 states and 2749 transitions. [2022-09-16 12:00:44,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 226 transitions, 1283 flow [2022-09-16 12:00:44,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 226 transitions, 1117 flow, removed 29 selfloop flow, removed 14 redundant places. [2022-09-16 12:00:44,451 INFO L231 Difference]: Finished difference. Result has 186 places, 158 transitions, 734 flow [2022-09-16 12:00:44,452 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=734, PETRI_PLACES=186, PETRI_TRANSITIONS=158} [2022-09-16 12:00:44,452 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 66 predicate places. [2022-09-16 12:00:44,452 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 158 transitions, 734 flow [2022-09-16 12:00:44,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 70.25) internal successors, (3934), 56 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:44,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:44,455 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:44,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-16 12:00:44,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:44,668 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:44,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2112266963, now seen corresponding path program 2 times [2022-09-16 12:00:44,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:44,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145791457] [2022-09-16 12:00:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:44,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:44,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:44,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145791457] [2022-09-16 12:00:44,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145791457] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:00:44,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221172298] [2022-09-16 12:00:44,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 12:00:44,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:44,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:44,793 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) [2022-09-16 12:00:44,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-16 12:00:44,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-16 12:00:44,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 12:00:44,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-16 12:00:44,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:00:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-09-16 12:00:45,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:00:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-09-16 12:00:45,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221172298] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:00:45,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:00:45,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-09-16 12:00:45,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667163399] [2022-09-16 12:00:45,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:00:45,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-16 12:00:45,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:45,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-16 12:00:45,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-09-16 12:00:45,214 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 144 [2022-09-16 12:00:45,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 158 transitions, 734 flow. Second operand has 18 states, 18 states have (on average 101.61111111111111) internal successors, (1829), 18 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:45,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:45,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 144 [2022-09-16 12:00:45,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:46,009 INFO L130 PetriNetUnfolder]: 310/1636 cut-off events. [2022-09-16 12:00:46,009 INFO L131 PetriNetUnfolder]: For 2480/2774 co-relation queries the response was YES. [2022-09-16 12:00:46,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3762 conditions, 1636 events. 310/1636 cut-off events. For 2480/2774 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 10945 event pairs, 111 based on Foata normal form. 2/1523 useless extension candidates. Maximal degree in co-relation 3632. Up to 372 conditions per place. [2022-09-16 12:00:46,026 INFO L137 encePairwiseOnDemand]: 133/144 looper letters, 175 selfloop transitions, 25 changer transitions 0/285 dead transitions. [2022-09-16 12:00:46,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 285 transitions, 2020 flow [2022-09-16 12:00:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-09-16 12:00:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-09-16 12:00:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2469 transitions. [2022-09-16 12:00:46,031 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7144097222222222 [2022-09-16 12:00:46,031 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2469 transitions. [2022-09-16 12:00:46,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2469 transitions. [2022-09-16 12:00:46,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:46,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2469 transitions. [2022-09-16 12:00:46,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 102.875) internal successors, (2469), 24 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:46,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 144.0) internal successors, (3600), 25 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:46,043 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 144.0) internal successors, (3600), 25 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:46,043 INFO L175 Difference]: Start difference. First operand has 186 places, 158 transitions, 734 flow. Second operand 24 states and 2469 transitions. [2022-09-16 12:00:46,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 285 transitions, 2020 flow [2022-09-16 12:00:46,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 285 transitions, 1933 flow, removed 20 selfloop flow, removed 20 redundant places. [2022-09-16 12:00:46,055 INFO L231 Difference]: Finished difference. Result has 189 places, 162 transitions, 736 flow [2022-09-16 12:00:46,055 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=736, PETRI_PLACES=189, PETRI_TRANSITIONS=162} [2022-09-16 12:00:46,056 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 69 predicate places. [2022-09-16 12:00:46,056 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 162 transitions, 736 flow [2022-09-16 12:00:46,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 101.61111111111111) internal successors, (1829), 18 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:46,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:46,073 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:46,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-16 12:00:46,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-09-16 12:00:46,296 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1893728655, now seen corresponding path program 1 times [2022-09-16 12:00:46,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:46,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706672360] [2022-09-16 12:00:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:46,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:00:46,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:46,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706672360] [2022-09-16 12:00:46,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706672360] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:46,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:46,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 12:00:46,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579811323] [2022-09-16 12:00:46,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:46,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:00:46,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:46,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:00:46,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:00:46,345 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 144 [2022-09-16 12:00:46,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 162 transitions, 736 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:46,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:46,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 144 [2022-09-16 12:00:46,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:46,777 INFO L130 PetriNetUnfolder]: 484/2629 cut-off events. [2022-09-16 12:00:46,778 INFO L131 PetriNetUnfolder]: For 3865/4191 co-relation queries the response was YES. [2022-09-16 12:00:46,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5597 conditions, 2629 events. 484/2629 cut-off events. For 3865/4191 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 20781 event pairs, 96 based on Foata normal form. 68/2499 useless extension candidates. Maximal degree in co-relation 4450. Up to 567 conditions per place. [2022-09-16 12:00:46,807 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 43 selfloop transitions, 15 changer transitions 5/182 dead transitions. [2022-09-16 12:00:46,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 182 transitions, 1015 flow [2022-09-16 12:00:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-16 12:00:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-16 12:00:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2022-09-16 12:00:46,809 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8524305555555556 [2022-09-16 12:00:46,809 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2022-09-16 12:00:46,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2022-09-16 12:00:46,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:46,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2022-09-16 12:00:46,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:46,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:46,811 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:46,811 INFO L175 Difference]: Start difference. First operand has 189 places, 162 transitions, 736 flow. Second operand 4 states and 491 transitions. [2022-09-16 12:00:46,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 182 transitions, 1015 flow [2022-09-16 12:00:46,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 182 transitions, 957 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-09-16 12:00:46,822 INFO L231 Difference]: Finished difference. Result has 177 places, 171 transitions, 880 flow [2022-09-16 12:00:46,823 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=880, PETRI_PLACES=177, PETRI_TRANSITIONS=171} [2022-09-16 12:00:46,824 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 57 predicate places. [2022-09-16 12:00:46,824 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 171 transitions, 880 flow [2022-09-16 12:00:46,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:46,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:46,825 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:46,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-09-16 12:00:46,825 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:46,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:46,825 INFO L85 PathProgramCache]: Analyzing trace with hash 332792196, now seen corresponding path program 1 times [2022-09-16 12:00:46,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:46,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228349455] [2022-09-16 12:00:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:46,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-16 12:00:46,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228349455] [2022-09-16 12:00:46,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228349455] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:46,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:46,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-16 12:00:46,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674909002] [2022-09-16 12:00:46,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:46,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-16 12:00:46,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:46,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-16 12:00:46,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-09-16 12:00:46,924 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 144 [2022-09-16 12:00:46,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 171 transitions, 880 flow. Second operand has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:46,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:46,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 144 [2022-09-16 12:00:46,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:47,547 INFO L130 PetriNetUnfolder]: 787/2971 cut-off events. [2022-09-16 12:00:47,548 INFO L131 PetriNetUnfolder]: For 8714/11734 co-relation queries the response was YES. [2022-09-16 12:00:47,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8091 conditions, 2971 events. 787/2971 cut-off events. For 8714/11734 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 21513 event pairs, 156 based on Foata normal form. 128/2747 useless extension candidates. Maximal degree in co-relation 5798. Up to 1086 conditions per place. [2022-09-16 12:00:47,589 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 63 selfloop transitions, 8 changer transitions 0/178 dead transitions. [2022-09-16 12:00:47,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 178 transitions, 1058 flow [2022-09-16 12:00:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 12:00:47,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 12:00:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2022-09-16 12:00:47,602 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7708333333333334 [2022-09-16 12:00:47,602 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2022-09-16 12:00:47,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2022-09-16 12:00:47,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:47,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2022-09-16 12:00:47,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:47,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:47,604 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:47,604 INFO L175 Difference]: Start difference. First operand has 177 places, 171 transitions, 880 flow. Second operand 5 states and 555 transitions. [2022-09-16 12:00:47,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 178 transitions, 1058 flow [2022-09-16 12:00:47,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 178 transitions, 1045 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-09-16 12:00:47,651 INFO L231 Difference]: Finished difference. Result has 177 places, 170 transitions, 883 flow [2022-09-16 12:00:47,652 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=883, PETRI_PLACES=177, PETRI_TRANSITIONS=170} [2022-09-16 12:00:47,652 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 57 predicate places. [2022-09-16 12:00:47,653 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 170 transitions, 883 flow [2022-09-16 12:00:47,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:47,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:47,653 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:47,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-09-16 12:00:47,653 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:47,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1025578855, now seen corresponding path program 1 times [2022-09-16 12:00:47,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:47,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321014666] [2022-09-16 12:00:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:47,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 12:00:47,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:47,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321014666] [2022-09-16 12:00:47,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321014666] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 12:00:47,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 12:00:47,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-16 12:00:47,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312823631] [2022-09-16 12:00:47,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 12:00:47,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 12:00:47,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:47,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 12:00:47,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 12:00:47,772 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 144 [2022-09-16 12:00:47,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 170 transitions, 883 flow. Second operand has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:47,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:47,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 144 [2022-09-16 12:00:47,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:48,254 INFO L130 PetriNetUnfolder]: 523/3520 cut-off events. [2022-09-16 12:00:48,254 INFO L131 PetriNetUnfolder]: For 7663/7681 co-relation queries the response was YES. [2022-09-16 12:00:48,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8431 conditions, 3520 events. 523/3520 cut-off events. For 7663/7681 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 29744 event pairs, 93 based on Foata normal form. 127/3359 useless extension candidates. Maximal degree in co-relation 5621. Up to 684 conditions per place. [2022-09-16 12:00:48,290 INFO L137 encePairwiseOnDemand]: 140/144 looper letters, 62 selfloop transitions, 4 changer transitions 0/185 dead transitions. [2022-09-16 12:00:48,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 185 transitions, 1178 flow [2022-09-16 12:00:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-16 12:00:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-16 12:00:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 485 transitions. [2022-09-16 12:00:48,292 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8420138888888888 [2022-09-16 12:00:48,292 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 485 transitions. [2022-09-16 12:00:48,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 485 transitions. [2022-09-16 12:00:48,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:48,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 485 transitions. [2022-09-16 12:00:48,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:48,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:48,294 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:48,294 INFO L175 Difference]: Start difference. First operand has 177 places, 170 transitions, 883 flow. Second operand 4 states and 485 transitions. [2022-09-16 12:00:48,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 185 transitions, 1178 flow [2022-09-16 12:00:48,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 185 transitions, 1154 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-16 12:00:48,315 INFO L231 Difference]: Finished difference. Result has 178 places, 169 transitions, 862 flow [2022-09-16 12:00:48,316 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=862, PETRI_PLACES=178, PETRI_TRANSITIONS=169} [2022-09-16 12:00:48,316 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 58 predicate places. [2022-09-16 12:00:48,316 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 169 transitions, 862 flow [2022-09-16 12:00:48,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:48,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:48,317 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:48,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-09-16 12:00:48,317 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:48,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:48,317 INFO L85 PathProgramCache]: Analyzing trace with hash 330985323, now seen corresponding path program 1 times [2022-09-16 12:00:48,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:48,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567437260] [2022-09-16 12:00:48,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:48,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-16 12:00:48,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:48,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567437260] [2022-09-16 12:00:48,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567437260] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:00:48,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008112139] [2022-09-16 12:00:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:48,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:48,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:48,662 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) [2022-09-16 12:00:48,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-16 12:00:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:48,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 21 conjunts are in the unsatisfiable core [2022-09-16 12:00:48,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:00:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:49,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:00:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:50,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008112139] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:00:50,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:00:50,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 31 [2022-09-16 12:00:50,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294994067] [2022-09-16 12:00:50,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:00:50,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-09-16 12:00:50,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:50,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-09-16 12:00:50,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2022-09-16 12:00:50,029 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 144 [2022-09-16 12:00:50,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 169 transitions, 862 flow. Second operand has 31 states, 31 states have (on average 96.03225806451613) internal successors, (2977), 31 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:50,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:50,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 144 [2022-09-16 12:00:50,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:51,242 INFO L130 PetriNetUnfolder]: 820/3420 cut-off events. [2022-09-16 12:00:51,242 INFO L131 PetriNetUnfolder]: For 12263/12263 co-relation queries the response was YES. [2022-09-16 12:00:51,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10417 conditions, 3420 events. 820/3420 cut-off events. For 12263/12263 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 27244 event pairs, 595 based on Foata normal form. 2/3158 useless extension candidates. Maximal degree in co-relation 7585. Up to 1634 conditions per place. [2022-09-16 12:00:51,304 INFO L137 encePairwiseOnDemand]: 126/144 looper letters, 66 selfloop transitions, 20 changer transitions 24/185 dead transitions. [2022-09-16 12:00:51,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 185 transitions, 1028 flow [2022-09-16 12:00:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-09-16 12:00:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-09-16 12:00:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2218 transitions. [2022-09-16 12:00:51,309 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6696859903381642 [2022-09-16 12:00:51,309 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2218 transitions. [2022-09-16 12:00:51,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2218 transitions. [2022-09-16 12:00:51,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:51,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2218 transitions. [2022-09-16 12:00:51,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 96.43478260869566) internal successors, (2218), 23 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:51,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:51,334 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:51,335 INFO L175 Difference]: Start difference. First operand has 178 places, 169 transitions, 862 flow. Second operand 23 states and 2218 transitions. [2022-09-16 12:00:51,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 185 transitions, 1028 flow [2022-09-16 12:00:51,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 185 transitions, 1008 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-09-16 12:00:51,429 INFO L231 Difference]: Finished difference. Result has 203 places, 148 transitions, 717 flow [2022-09-16 12:00:51,429 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=717, PETRI_PLACES=203, PETRI_TRANSITIONS=148} [2022-09-16 12:00:51,429 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 83 predicate places. [2022-09-16 12:00:51,429 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 148 transitions, 717 flow [2022-09-16 12:00:51,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 96.03225806451613) internal successors, (2977), 31 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:51,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:51,431 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:51,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-09-16 12:00:51,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-09-16 12:00:51,645 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1054059764, now seen corresponding path program 1 times [2022-09-16 12:00:51,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:51,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892133211] [2022-09-16 12:00:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:51,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-16 12:00:51,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:00:51,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892133211] [2022-09-16 12:00:51,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892133211] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:00:51,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594057696] [2022-09-16 12:00:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:51,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:51,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:00:51,786 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) [2022-09-16 12:00:51,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-16 12:00:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:00:51,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 36 conjunts are in the unsatisfiable core [2022-09-16 12:00:51,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:00:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:52,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:00:52,742 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-16 12:00:52,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-09-16 12:00:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:00:53,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594057696] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:00:53,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:00:53,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 16, 15] total 34 [2022-09-16 12:00:53,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603128223] [2022-09-16 12:00:53,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:00:53,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-09-16 12:00:53,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:00:53,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-09-16 12:00:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2022-09-16 12:00:53,810 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 144 [2022-09-16 12:00:53,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 148 transitions, 717 flow. Second operand has 35 states, 35 states have (on average 86.48571428571428) internal successors, (3027), 35 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:53,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:00:53,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 144 [2022-09-16 12:00:53,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:00:58,097 INFO L130 PetriNetUnfolder]: 3216/8881 cut-off events. [2022-09-16 12:00:58,097 INFO L131 PetriNetUnfolder]: For 29945/29945 co-relation queries the response was YES. [2022-09-16 12:00:58,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28831 conditions, 8881 events. 3216/8881 cut-off events. For 29945/29945 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 81121 event pairs, 542 based on Foata normal form. 324/8698 useless extension candidates. Maximal degree in co-relation 22331. Up to 2381 conditions per place. [2022-09-16 12:00:58,239 INFO L137 encePairwiseOnDemand]: 122/144 looper letters, 211 selfloop transitions, 209 changer transitions 13/500 dead transitions. [2022-09-16 12:00:58,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 500 transitions, 4254 flow [2022-09-16 12:00:58,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-09-16 12:00:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-09-16 12:00:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 5849 transitions. [2022-09-16 12:00:58,247 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6154250841750841 [2022-09-16 12:00:58,248 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 5849 transitions. [2022-09-16 12:00:58,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 5849 transitions. [2022-09-16 12:00:58,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:00:58,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 5849 transitions. [2022-09-16 12:00:58,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 88.62121212121212) internal successors, (5849), 66 states have internal predecessors, (5849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:58,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 144.0) internal successors, (9648), 67 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:58,312 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 144.0) internal successors, (9648), 67 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:58,312 INFO L175 Difference]: Start difference. First operand has 203 places, 148 transitions, 717 flow. Second operand 66 states and 5849 transitions. [2022-09-16 12:00:58,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 500 transitions, 4254 flow [2022-09-16 12:00:58,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 500 transitions, 3804 flow, removed 209 selfloop flow, removed 24 redundant places. [2022-09-16 12:00:58,372 INFO L231 Difference]: Finished difference. Result has 264 places, 348 transitions, 3343 flow [2022-09-16 12:00:58,373 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=3343, PETRI_PLACES=264, PETRI_TRANSITIONS=348} [2022-09-16 12:00:58,373 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 144 predicate places. [2022-09-16 12:00:58,373 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 348 transitions, 3343 flow [2022-09-16 12:00:58,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 86.48571428571428) internal successors, (3027), 35 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:00:58,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:00:58,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:00:58,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-16 12:00:58,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:00:58,599 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:00:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:00:58,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2063870011, now seen corresponding path program 2 times [2022-09-16 12:00:58,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:00:58,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943219533] [2022-09-16 12:00:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:00:58,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:00:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:01:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:01:00,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:01:00,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943219533] [2022-09-16 12:01:00,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943219533] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:01:00,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88388895] [2022-09-16 12:01:00,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 12:01:00,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:01:00,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:01:00,188 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) [2022-09-16 12:01:00,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-16 12:01:00,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-16 12:01:00,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 12:01:00,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 53 conjunts are in the unsatisfiable core [2022-09-16 12:01:00,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:01:00,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-09-16 12:01:01,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-16 12:01:01,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-09-16 12:01:01,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-16 12:01:01,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-09-16 12:01:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:01:02,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:01:03,654 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-16 12:01:03,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-09-16 12:01:03,697 INFO L356 Elim1Store]: treesize reduction 12, result has 83.6 percent of original size [2022-09-16 12:01:03,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 194 treesize of output 222 [2022-09-16 12:01:03,732 INFO L356 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-09-16 12:01:03,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 158 treesize of output 146 [2022-09-16 12:01:03,755 INFO L356 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-09-16 12:01:03,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 93 treesize of output 99 [2022-09-16 12:01:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:01:08,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88388895] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:01:08,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:01:08,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 24] total 76 [2022-09-16 12:01:08,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867635270] [2022-09-16 12:01:08,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:01:08,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-09-16 12:01:08,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:01:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-09-16 12:01:08,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=5486, Unknown=12, NotChecked=0, Total=5852 [2022-09-16 12:01:08,345 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 144 [2022-09-16 12:01:08,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 348 transitions, 3343 flow. Second operand has 77 states, 77 states have (on average 69.2987012987013) internal successors, (5336), 77 states have internal predecessors, (5336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:08,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:01:08,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 144 [2022-09-16 12:01:08,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:01:15,573 INFO L130 PetriNetUnfolder]: 3300/10078 cut-off events. [2022-09-16 12:01:15,574 INFO L131 PetriNetUnfolder]: For 227744/228681 co-relation queries the response was YES. [2022-09-16 12:01:15,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52358 conditions, 10078 events. 3300/10078 cut-off events. For 227744/228681 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 96702 event pairs, 1250 based on Foata normal form. 109/9483 useless extension candidates. Maximal degree in co-relation 35624. Up to 4989 conditions per place. [2022-09-16 12:01:15,784 INFO L137 encePairwiseOnDemand]: 108/144 looper letters, 321 selfloop transitions, 108 changer transitions 1/483 dead transitions. [2022-09-16 12:01:15,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 483 transitions, 5748 flow [2022-09-16 12:01:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-09-16 12:01:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-09-16 12:01:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3429 transitions. [2022-09-16 12:01:15,795 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.48596938775510207 [2022-09-16 12:01:15,795 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3429 transitions. [2022-09-16 12:01:15,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3429 transitions. [2022-09-16 12:01:15,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:01:15,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3429 transitions. [2022-09-16 12:01:15,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 69.9795918367347) internal successors, (3429), 49 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:15,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 144.0) internal successors, (7200), 50 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:15,842 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 144.0) internal successors, (7200), 50 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:15,842 INFO L175 Difference]: Start difference. First operand has 264 places, 348 transitions, 3343 flow. Second operand 49 states and 3429 transitions. [2022-09-16 12:01:15,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 483 transitions, 5748 flow [2022-09-16 12:01:17,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 483 transitions, 5196 flow, removed 262 selfloop flow, removed 12 redundant places. [2022-09-16 12:01:17,219 INFO L231 Difference]: Finished difference. Result has 325 places, 426 transitions, 4355 flow [2022-09-16 12:01:17,220 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=2913, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=4355, PETRI_PLACES=325, PETRI_TRANSITIONS=426} [2022-09-16 12:01:17,221 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 205 predicate places. [2022-09-16 12:01:17,221 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 426 transitions, 4355 flow [2022-09-16 12:01:17,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 69.2987012987013) internal successors, (5336), 77 states have internal predecessors, (5336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:17,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:01:17,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:01:17,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-09-16 12:01:17,441 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,SelfDestructingSolverStorable17 [2022-09-16 12:01:17,442 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:01:17,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:01:17,442 INFO L85 PathProgramCache]: Analyzing trace with hash 258873333, now seen corresponding path program 3 times [2022-09-16 12:01:17,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:01:17,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144361469] [2022-09-16 12:01:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:01:17,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:01:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:01:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:01:18,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:01:18,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144361469] [2022-09-16 12:01:18,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144361469] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:01:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569339179] [2022-09-16 12:01:18,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-16 12:01:18,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:01:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:01:18,206 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) [2022-09-16 12:01:18,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-16 12:01:18,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-16 12:01:18,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 12:01:18,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 22 conjunts are in the unsatisfiable core [2022-09-16 12:01:18,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:01:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-16 12:01:18,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:01:18,873 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-16 12:01:18,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 52 treesize of output 70 [2022-09-16 12:01:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-16 12:01:19,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569339179] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:01:19,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:01:19,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 6, 6] total 33 [2022-09-16 12:01:19,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444848030] [2022-09-16 12:01:19,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:01:19,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-16 12:01:19,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:01:19,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-16 12:01:19,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2022-09-16 12:01:19,281 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 144 [2022-09-16 12:01:19,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 426 transitions, 4355 flow. Second operand has 34 states, 34 states have (on average 80.23529411764706) internal successors, (2728), 34 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:19,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:01:19,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 144 [2022-09-16 12:01:19,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:01:27,841 INFO L130 PetriNetUnfolder]: 6556/19032 cut-off events. [2022-09-16 12:01:27,842 INFO L131 PetriNetUnfolder]: For 567703/569022 co-relation queries the response was YES. [2022-09-16 12:01:28,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113783 conditions, 19032 events. 6556/19032 cut-off events. For 567703/569022 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 202387 event pairs, 830 based on Foata normal form. 540/18460 useless extension candidates. Maximal degree in co-relation 113563. Up to 4091 conditions per place. [2022-09-16 12:01:28,133 INFO L137 encePairwiseOnDemand]: 119/144 looper letters, 661 selfloop transitions, 244 changer transitions 7/974 dead transitions. [2022-09-16 12:01:28,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 974 transitions, 12744 flow [2022-09-16 12:01:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-09-16 12:01:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-09-16 12:01:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5249 transitions. [2022-09-16 12:01:28,140 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5695529513888888 [2022-09-16 12:01:28,141 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5249 transitions. [2022-09-16 12:01:28,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5249 transitions. [2022-09-16 12:01:28,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:01:28,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5249 transitions. [2022-09-16 12:01:28,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 82.015625) internal successors, (5249), 64 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:28,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 144.0) internal successors, (9360), 65 states have internal predecessors, (9360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:28,162 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 144.0) internal successors, (9360), 65 states have internal predecessors, (9360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:28,162 INFO L175 Difference]: Start difference. First operand has 325 places, 426 transitions, 4355 flow. Second operand 64 states and 5249 transitions. [2022-09-16 12:01:28,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 974 transitions, 12744 flow [2022-09-16 12:01:30,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 974 transitions, 12403 flow, removed 136 selfloop flow, removed 25 redundant places. [2022-09-16 12:01:30,541 INFO L231 Difference]: Finished difference. Result has 394 places, 600 transitions, 7597 flow [2022-09-16 12:01:30,542 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=7597, PETRI_PLACES=394, PETRI_TRANSITIONS=600} [2022-09-16 12:01:30,542 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 274 predicate places. [2022-09-16 12:01:30,542 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 600 transitions, 7597 flow [2022-09-16 12:01:30,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 80.23529411764706) internal successors, (2728), 34 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:30,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:01:30,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:01:30,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-16 12:01:30,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:01:30,755 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:01:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:01:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1224931098, now seen corresponding path program 2 times [2022-09-16 12:01:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:01:30,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624343344] [2022-09-16 12:01:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:01:30,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:01:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:01:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:01:31,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:01:31,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624343344] [2022-09-16 12:01:31,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624343344] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:01:31,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814872798] [2022-09-16 12:01:31,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 12:01:31,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:01:31,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:01:31,382 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) [2022-09-16 12:01:31,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-16 12:01:31,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-16 12:01:31,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 12:01:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 38 conjunts are in the unsatisfiable core [2022-09-16 12:01:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:01:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:01:32,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:01:32,312 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-09-16 12:01:32,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 17 [2022-09-16 12:01:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:01:33,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814872798] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:01:33,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:01:33,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 13] total 45 [2022-09-16 12:01:33,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379686208] [2022-09-16 12:01:33,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:01:33,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-09-16 12:01:33,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:01:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-09-16 12:01:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-09-16 12:01:33,062 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 144 [2022-09-16 12:01:33,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 600 transitions, 7597 flow. Second operand has 46 states, 46 states have (on average 79.21739130434783) internal successors, (3644), 46 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:01:33,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:01:33,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 144 [2022-09-16 12:01:33,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:02:12,133 INFO L130 PetriNetUnfolder]: 13690/37999 cut-off events. [2022-09-16 12:02:12,133 INFO L131 PetriNetUnfolder]: For 1652572/1655209 co-relation queries the response was YES. [2022-09-16 12:02:13,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241754 conditions, 37999 events. 13690/37999 cut-off events. For 1652572/1655209 co-relation queries the response was YES. Maximal size of possible extension queue 962. Compared 439623 event pairs, 923 based on Foata normal form. 2468/38412 useless extension candidates. Maximal degree in co-relation 241516. Up to 8699 conditions per place. [2022-09-16 12:02:13,945 INFO L137 encePairwiseOnDemand]: 116/144 looper letters, 1078 selfloop transitions, 1440 changer transitions 6/2586 dead transitions. [2022-09-16 12:02:13,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 2586 transitions, 47349 flow [2022-09-16 12:02:13,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-09-16 12:02:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2022-09-16 12:02:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 15702 transitions. [2022-09-16 12:02:13,963 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5679253472222222 [2022-09-16 12:02:13,964 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 15702 transitions. [2022-09-16 12:02:13,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 15702 transitions. [2022-09-16 12:02:13,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:02:13,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 15702 transitions. [2022-09-16 12:02:13,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 81.78125) internal successors, (15702), 192 states have internal predecessors, (15702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:02:14,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 144.0) internal successors, (27792), 193 states have internal predecessors, (27792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:02:14,033 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 144.0) internal successors, (27792), 193 states have internal predecessors, (27792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:02:14,033 INFO L175 Difference]: Start difference. First operand has 394 places, 600 transitions, 7597 flow. Second operand 192 states and 15702 transitions. [2022-09-16 12:02:14,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 2586 transitions, 47349 flow [2022-09-16 12:02:24,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 2586 transitions, 45250 flow, removed 1018 selfloop flow, removed 23 redundant places. [2022-09-16 12:02:24,121 INFO L231 Difference]: Finished difference. Result has 667 places, 1861 transitions, 35267 flow [2022-09-16 12:02:24,122 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=35267, PETRI_PLACES=667, PETRI_TRANSITIONS=1861} [2022-09-16 12:02:24,123 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 547 predicate places. [2022-09-16 12:02:24,123 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 1861 transitions, 35267 flow [2022-09-16 12:02:24,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 79.21739130434783) internal successors, (3644), 46 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:02:24,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:02:24,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:02:24,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-09-16 12:02:24,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:02:24,338 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:02:24,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:02:24,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1224931097, now seen corresponding path program 4 times [2022-09-16 12:02:24,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:02:24,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322410338] [2022-09-16 12:02:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:02:24,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:02:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:02:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:02:25,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:02:25,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322410338] [2022-09-16 12:02:25,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322410338] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:02:25,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847308939] [2022-09-16 12:02:25,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-16 12:02:25,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:02:25,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:02:25,359 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) [2022-09-16 12:02:25,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-09-16 12:02:25,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-16 12:02:25,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 12:02:25,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 43 conjunts are in the unsatisfiable core [2022-09-16 12:02:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:02:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:02:26,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:02:26,969 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-09-16 12:02:26,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 70 [2022-09-16 12:02:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:02:28,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847308939] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:02:28,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:02:28,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 17] total 57 [2022-09-16 12:02:28,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618786150] [2022-09-16 12:02:28,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:02:28,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-09-16 12:02:28,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:02:28,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-09-16 12:02:28,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=2945, Unknown=0, NotChecked=0, Total=3306 [2022-09-16 12:02:28,956 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 144 [2022-09-16 12:02:28,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 1861 transitions, 35267 flow. Second operand has 58 states, 58 states have (on average 70.05172413793103) internal successors, (4063), 58 states have internal predecessors, (4063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:02:28,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:02:28,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 144 [2022-09-16 12:02:28,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 12:03:33,528 INFO L130 PetriNetUnfolder]: 18231/51753 cut-off events. [2022-09-16 12:03:33,529 INFO L131 PetriNetUnfolder]: For 11113634/11117380 co-relation queries the response was YES. [2022-09-16 12:03:37,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499432 conditions, 51753 events. 18231/51753 cut-off events. For 11113634/11117380 co-relation queries the response was YES. Maximal size of possible extension queue 1207. Compared 628637 event pairs, 514 based on Foata normal form. 2611/51942 useless extension candidates. Maximal degree in co-relation 499076. Up to 11432 conditions per place. [2022-09-16 12:03:38,135 INFO L137 encePairwiseOnDemand]: 109/144 looper letters, 1627 selfloop transitions, 2020 changer transitions 57/3757 dead transitions. [2022-09-16 12:03:38,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 3757 transitions, 86862 flow [2022-09-16 12:03:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-09-16 12:03:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2022-09-16 12:03:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 7369 transitions. [2022-09-16 12:03:38,144 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5017020697167756 [2022-09-16 12:03:38,144 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 7369 transitions. [2022-09-16 12:03:38,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 7369 transitions. [2022-09-16 12:03:38,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 12:03:38,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 7369 transitions. [2022-09-16 12:03:38,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 72.24509803921569) internal successors, (7369), 102 states have internal predecessors, (7369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:03:38,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 144.0) internal successors, (14832), 103 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:03:38,167 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 144.0) internal successors, (14832), 103 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:03:38,168 INFO L175 Difference]: Start difference. First operand has 667 places, 1861 transitions, 35267 flow. Second operand 102 states and 7369 transitions. [2022-09-16 12:03:38,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 3757 transitions, 86862 flow [2022-09-16 12:10:39,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 3757 transitions, 65618 flow, removed 10549 selfloop flow, removed 27 redundant places. [2022-09-16 12:10:39,121 INFO L231 Difference]: Finished difference. Result has 777 places, 2807 transitions, 57330 flow [2022-09-16 12:10:39,122 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=25957, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=57330, PETRI_PLACES=777, PETRI_TRANSITIONS=2807} [2022-09-16 12:10:39,123 INFO L287 CegarLoopForPetriNet]: 120 programPoint places, 657 predicate places. [2022-09-16 12:10:39,123 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 2807 transitions, 57330 flow [2022-09-16 12:10:39,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 70.05172413793103) internal successors, (4063), 58 states have internal predecessors, (4063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:10:39,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 12:10:39,124 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 12:10:39,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-09-16 12:10:39,333 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,SelfDestructingSolverStorable20 [2022-09-16 12:10:39,334 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-09-16 12:10:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 12:10:39,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1710563266, now seen corresponding path program 5 times [2022-09-16 12:10:39,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 12:10:39,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394352616] [2022-09-16 12:10:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 12:10:39,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 12:10:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 12:10:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:10:40,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 12:10:40,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394352616] [2022-09-16 12:10:40,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394352616] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 12:10:40,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737580500] [2022-09-16 12:10:40,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-16 12:10:40,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 12:10:40,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 12:10:40,242 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) [2022-09-16 12:10:40,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-09-16 12:10:40,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-16 12:10:40,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 12:10:40,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2022-09-16 12:10:40,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 12:10:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:10:41,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 12:10:41,597 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-09-16 12:10:41,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 70 [2022-09-16 12:10:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 12:10:43,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737580500] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 12:10:43,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 12:10:43,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 17, 17] total 59 [2022-09-16 12:10:43,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632658916] [2022-09-16 12:10:43,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 12:10:43,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-09-16 12:10:43,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 12:10:43,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-09-16 12:10:43,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=3050, Unknown=0, NotChecked=0, Total=3540 [2022-09-16 12:10:43,071 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 144 [2022-09-16 12:10:43,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 2807 transitions, 57330 flow. Second operand has 60 states, 60 states have (on average 70.0) internal successors, (4200), 60 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 12:10:43,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 12:10:43,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 144 [2022-09-16 12:10:43,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand