./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 12:03:07,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 12:03:07,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 12:03:07,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 12:03:07,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 12:03:07,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 12:03:07,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 12:03:07,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 12:03:07,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 12:03:07,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 12:03:07,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 12:03:07,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 12:03:07,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 12:03:07,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 12:03:07,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 12:03:07,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 12:03:07,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 12:03:07,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 12:03:07,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 12:03:07,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 12:03:07,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 12:03:07,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 12:03:07,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 12:03:07,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 12:03:07,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 12:03:07,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 12:03:07,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 12:03:07,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 12:03:07,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 12:03:07,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 12:03:07,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 12:03:07,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 12:03:07,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 12:03:07,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 12:03:07,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 12:03:07,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 12:03:07,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 12:03:07,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 12:03:07,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 12:03:07,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 12:03:07,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 12:03:07,962 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 12:03:08,002 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 12:03:08,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 12:03:08,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 12:03:08,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 12:03:08,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 12:03:08,005 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 12:03:08,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 12:03:08,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 12:03:08,006 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 12:03:08,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 12:03:08,007 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 12:03:08,007 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 12:03:08,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 12:03:08,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 12:03:08,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 12:03:08,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 12:03:08,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 12:03:08,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 12:03:08,009 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 12:03:08,009 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 12:03:08,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 12:03:08,009 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 12:03:08,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 12:03:08,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 12:03:08,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 12:03:08,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 12:03:08,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 12:03:08,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 12:03:08,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 12:03:08,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 12:03:08,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 12:03:08,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 12:03:08,012 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 12:03:08,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 12:03:08,012 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 12:03:08,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 12:03:08,012 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 12:03:08,013 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 12:03:08,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 12:03:08,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 12:03:08,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 12:03:08,412 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 12:03:08,412 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 12:03:08,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-08-30 12:03:09,462 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 12:03:09,713 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 12:03:09,714 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-08-30 12:03:09,721 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cada554de/e5245fde80184183bc9ec4208664bb85/FLAG47c79afdc [2023-08-30 12:03:09,740 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cada554de/e5245fde80184183bc9ec4208664bb85 [2023-08-30 12:03:09,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 12:03:09,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 12:03:09,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 12:03:09,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 12:03:09,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 12:03:09,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:03:09" (1/1) ... [2023-08-30 12:03:09,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48979967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:09, skipping insertion in model container [2023-08-30 12:03:09,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:03:09" (1/1) ... [2023-08-30 12:03:09,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 12:03:09,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 12:03:09,974 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c[2987,3000] [2023-08-30 12:03:09,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 12:03:09,998 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 12:03:10,034 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c[2987,3000] [2023-08-30 12:03:10,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 12:03:10,055 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 12:03:10,055 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 12:03:10,061 INFO L208 MainTranslator]: Completed translation [2023-08-30 12:03:10,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10 WrapperNode [2023-08-30 12:03:10,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 12:03:10,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 12:03:10,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 12:03:10,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 12:03:10,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10" (1/1) ... [2023-08-30 12:03:10,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10" (1/1) ... [2023-08-30 12:03:10,119 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 223 [2023-08-30 12:03:10,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 12:03:10,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 12:03:10,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 12:03:10,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 12:03:10,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10" (1/1) ... [2023-08-30 12:03:10,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10" (1/1) ... [2023-08-30 12:03:10,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10" (1/1) ... [2023-08-30 12:03:10,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10" (1/1) ... [2023-08-30 12:03:10,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10" (1/1) ... [2023-08-30 12:03:10,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10" (1/1) ... [2023-08-30 12:03:10,167 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10" (1/1) ... [2023-08-30 12:03:10,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10" (1/1) ... [2023-08-30 12:03:10,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 12:03:10,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 12:03:10,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 12:03:10,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 12:03:10,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10" (1/1) ... [2023-08-30 12:03:10,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 12:03:10,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:10,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 12:03:10,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 12:03:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 12:03:10,258 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 12:03:10,258 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 12:03:10,258 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 12:03:10,258 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 12:03:10,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 12:03:10,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 12:03:10,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 12:03:10,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 12:03:10,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 12:03:10,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 12:03:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 12:03:10,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 12:03:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 12:03:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 12:03:10,262 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 12:03:10,345 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 12:03:10,347 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 12:03:10,759 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 12:03:10,934 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 12:03:10,935 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 12:03:10,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:03:10 BoogieIcfgContainer [2023-08-30 12:03:10,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 12:03:10,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 12:03:10,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 12:03:10,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 12:03:10,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:03:09" (1/3) ... [2023-08-30 12:03:10,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480b3574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:03:10, skipping insertion in model container [2023-08-30 12:03:10,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:03:10" (2/3) ... [2023-08-30 12:03:10,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480b3574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:03:10, skipping insertion in model container [2023-08-30 12:03:10,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:03:10" (3/3) ... [2023-08-30 12:03:10,944 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2023-08-30 12:03:10,951 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 12:03:10,959 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 12:03:10,959 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 12:03:10,959 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 12:03:11,033 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 12:03:11,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 192 transitions, 400 flow [2023-08-30 12:03:11,185 INFO L130 PetriNetUnfolder]: 13/190 cut-off events. [2023-08-30 12:03:11,185 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 12:03:11,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 190 events. 13/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 163 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2023-08-30 12:03:11,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 192 transitions, 400 flow [2023-08-30 12:03:11,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 174 transitions, 357 flow [2023-08-30 12:03:11,208 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 12:03:11,219 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 174 transitions, 357 flow [2023-08-30 12:03:11,223 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 174 transitions, 357 flow [2023-08-30 12:03:11,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 174 transitions, 357 flow [2023-08-30 12:03:11,289 INFO L130 PetriNetUnfolder]: 12/174 cut-off events. [2023-08-30 12:03:11,290 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 12:03:11,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 174 events. 12/174 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2023-08-30 12:03:11,294 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-30 12:03:17,587 INFO L134 LiptonReduction]: Checked pairs total: 3067 [2023-08-30 12:03:17,588 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-08-30 12:03:17,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 12:03:17,606 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3b1565c4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 12:03:17,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-08-30 12:03:17,609 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 12:03:17,610 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 12:03:17,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:17,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 12:03:17,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:17,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:17,615 INFO L85 PathProgramCache]: Analyzing trace with hash 27239, now seen corresponding path program 1 times [2023-08-30 12:03:17,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:17,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391813185] [2023-08-30 12:03:17,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:17,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:17,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:17,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391813185] [2023-08-30 12:03:17,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391813185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:17,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:03:17,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 12:03:17,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612209513] [2023-08-30 12:03:17,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:17,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:03:17,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:17,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:03:17,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 12:03:18,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2023-08-30 12:03:18,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:18,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:18,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2023-08-30 12:03:18,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:18,193 INFO L130 PetriNetUnfolder]: 355/617 cut-off events. [2023-08-30 12:03:18,193 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-30 12:03:18,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 617 events. 355/617 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2715 event pairs, 288 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 560. Up to 312 conditions per place. [2023-08-30 12:03:18,204 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 49 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-08-30 12:03:18,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 53 transitions, 230 flow [2023-08-30 12:03:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:03:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:03:18,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2023-08-30 12:03:18,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49232158988256547 [2023-08-30 12:03:18,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2023-08-30 12:03:18,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2023-08-30 12:03:18,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:18,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2023-08-30 12:03:18,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:18,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:18,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:18,246 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 75 flow. Second operand 3 states and 545 transitions. [2023-08-30 12:03:18,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 53 transitions, 230 flow [2023-08-30 12:03:18,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 53 transitions, 220 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 12:03:18,253 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 98 flow [2023-08-30 12:03:18,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=33, PETRI_TRANSITIONS=32} [2023-08-30 12:03:18,259 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2023-08-30 12:03:18,260 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 98 flow [2023-08-30 12:03:18,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:18,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:18,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 12:03:18,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 12:03:18,264 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:18,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:18,273 INFO L85 PathProgramCache]: Analyzing trace with hash 845670, now seen corresponding path program 1 times [2023-08-30 12:03:18,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:18,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923161029] [2023-08-30 12:03:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:18,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:18,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:18,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923161029] [2023-08-30 12:03:18,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923161029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:18,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:03:18,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 12:03:18,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427525994] [2023-08-30 12:03:18,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:18,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:03:18,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:18,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:03:18,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 12:03:18,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2023-08-30 12:03:18,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:18,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:18,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2023-08-30 12:03:18,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:18,466 INFO L130 PetriNetUnfolder]: 355/615 cut-off events. [2023-08-30 12:03:18,467 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 12:03:18,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 615 events. 355/615 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 2735 event pairs, 288 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 627. Up to 615 conditions per place. [2023-08-30 12:03:18,470 INFO L137 encePairwiseOnDemand]: 366/369 looper letters, 29 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 12:03:18,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 150 flow [2023-08-30 12:03:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:03:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:03:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-30 12:03:18,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598012646793135 [2023-08-30 12:03:18,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-30 12:03:18,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-30 12:03:18,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:18,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-30 12:03:18,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:18,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:18,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:18,478 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 98 flow. Second operand 3 states and 509 transitions. [2023-08-30 12:03:18,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 150 flow [2023-08-30 12:03:18,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 12:03:18,479 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 84 flow [2023-08-30 12:03:18,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2023-08-30 12:03:18,480 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2023-08-30 12:03:18,480 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 84 flow [2023-08-30 12:03:18,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:18,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:18,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 12:03:18,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 12:03:18,482 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:18,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:18,482 INFO L85 PathProgramCache]: Analyzing trace with hash 845684, now seen corresponding path program 1 times [2023-08-30 12:03:18,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:18,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993930048] [2023-08-30 12:03:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:18,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:18,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:18,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993930048] [2023-08-30 12:03:18,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993930048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:18,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317277919] [2023-08-30 12:03:18,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:18,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:18,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:18,553 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:18,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 12:03:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:18,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 12:03:18,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:18,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:18,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317277919] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:18,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:18,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 12:03:18,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457152195] [2023-08-30 12:03:18,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:18,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 12:03:18,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:18,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 12:03:18,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 12:03:18,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2023-08-30 12:03:18,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 84 flow. Second operand has 7 states, 7 states have (on average 161.14285714285714) internal successors, (1128), 7 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:18,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:18,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2023-08-30 12:03:18,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:19,133 INFO L130 PetriNetUnfolder]: 886/1533 cut-off events. [2023-08-30 12:03:19,134 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 12:03:19,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3164 conditions, 1533 events. 886/1533 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7907 event pairs, 720 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 3156. Up to 310 conditions per place. [2023-08-30 12:03:19,141 INFO L137 encePairwiseOnDemand]: 363/369 looper letters, 110 selfloop transitions, 13 changer transitions 0/123 dead transitions. [2023-08-30 12:03:19,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 123 transitions, 550 flow [2023-08-30 12:03:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 12:03:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 12:03:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1089 transitions. [2023-08-30 12:03:19,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2023-08-30 12:03:19,145 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1089 transitions. [2023-08-30 12:03:19,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1089 transitions. [2023-08-30 12:03:19,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:19,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1089 transitions. [2023-08-30 12:03:19,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.5) internal successors, (1089), 6 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:19,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:19,157 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:19,157 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 84 flow. Second operand 6 states and 1089 transitions. [2023-08-30 12:03:19,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 123 transitions, 550 flow [2023-08-30 12:03:19,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 123 transitions, 549 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 12:03:19,160 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 176 flow [2023-08-30 12:03:19,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2023-08-30 12:03:19,161 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-30 12:03:19,161 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 176 flow [2023-08-30 12:03:19,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 161.14285714285714) internal successors, (1128), 7 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:19,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:19,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 12:03:19,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:19,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:19,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:19,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:19,369 INFO L85 PathProgramCache]: Analyzing trace with hash 812911231, now seen corresponding path program 1 times [2023-08-30 12:03:19,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:19,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641162779] [2023-08-30 12:03:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:19,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:19,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:19,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641162779] [2023-08-30 12:03:19,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641162779] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:19,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:03:19,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 12:03:19,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172967336] [2023-08-30 12:03:19,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:19,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 12:03:19,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 12:03:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 12:03:19,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 369 [2023-08-30 12:03:19,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:19,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:19,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 369 [2023-08-30 12:03:19,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:19,704 INFO L130 PetriNetUnfolder]: 731/1280 cut-off events. [2023-08-30 12:03:19,704 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 12:03:19,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2681 conditions, 1280 events. 731/1280 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6733 event pairs, 597 based on Foata normal form. 6/632 useless extension candidates. Maximal degree in co-relation 2669. Up to 1226 conditions per place. [2023-08-30 12:03:19,710 INFO L137 encePairwiseOnDemand]: 360/369 looper letters, 41 selfloop transitions, 7 changer transitions 2/50 dead transitions. [2023-08-30 12:03:19,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 302 flow [2023-08-30 12:03:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 12:03:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 12:03:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 669 transitions. [2023-08-30 12:03:19,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532520325203252 [2023-08-30 12:03:19,713 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 669 transitions. [2023-08-30 12:03:19,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 669 transitions. [2023-08-30 12:03:19,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:19,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 669 transitions. [2023-08-30 12:03:19,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:19,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:19,719 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:19,719 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 176 flow. Second operand 4 states and 669 transitions. [2023-08-30 12:03:19,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 302 flow [2023-08-30 12:03:19,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 283 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 12:03:19,722 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 195 flow [2023-08-30 12:03:19,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-08-30 12:03:19,723 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-08-30 12:03:19,723 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 195 flow [2023-08-30 12:03:19,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:19,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:19,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 12:03:19,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 12:03:19,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:19,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:19,725 INFO L85 PathProgramCache]: Analyzing trace with hash -568490395, now seen corresponding path program 1 times [2023-08-30 12:03:19,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:19,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469859598] [2023-08-30 12:03:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:19,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:19,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:19,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469859598] [2023-08-30 12:03:19,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469859598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:19,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254194872] [2023-08-30 12:03:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:19,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:19,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:19,807 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:19,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 12:03:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:19,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 12:03:19,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:19,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:03:19,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254194872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:19,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:03:19,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-30 12:03:19,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449312057] [2023-08-30 12:03:19,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:19,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:03:19,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:19,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:03:19,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 12:03:19,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 369 [2023-08-30 12:03:19,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:19,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:19,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 369 [2023-08-30 12:03:19,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:20,041 INFO L130 PetriNetUnfolder]: 559/988 cut-off events. [2023-08-30 12:03:20,041 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2023-08-30 12:03:20,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2318 conditions, 988 events. 559/988 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4938 event pairs, 441 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 2304. Up to 988 conditions per place. [2023-08-30 12:03:20,047 INFO L137 encePairwiseOnDemand]: 366/369 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 12:03:20,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 263 flow [2023-08-30 12:03:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:03:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:03:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-30 12:03:20,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2023-08-30 12:03:20,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-30 12:03:20,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-30 12:03:20,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:20,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-30 12:03:20,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:20,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:20,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:20,055 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 195 flow. Second operand 3 states and 519 transitions. [2023-08-30 12:03:20,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 263 flow [2023-08-30 12:03:20,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 255 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 12:03:20,057 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 181 flow [2023-08-30 12:03:20,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-30 12:03:20,058 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-30 12:03:20,058 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 181 flow [2023-08-30 12:03:20,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:20,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:20,059 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 12:03:20,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 12:03:20,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:20,265 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:20,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:20,265 INFO L85 PathProgramCache]: Analyzing trace with hash -575196619, now seen corresponding path program 2 times [2023-08-30 12:03:20,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:20,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55650517] [2023-08-30 12:03:20,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:20,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:20,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:20,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55650517] [2023-08-30 12:03:20,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55650517] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:20,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739976529] [2023-08-30 12:03:20,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:03:20,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:20,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:20,366 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:20,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 12:03:20,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 12:03:20,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:03:20,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 12:03:20,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 12:03:20,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:03:20,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739976529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:20,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:03:20,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 12:03:20,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947423967] [2023-08-30 12:03:20,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:20,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:03:20,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:20,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:03:20,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 12:03:20,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 369 [2023-08-30 12:03:20,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:20,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:20,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 369 [2023-08-30 12:03:20,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:20,598 INFO L130 PetriNetUnfolder]: 559/987 cut-off events. [2023-08-30 12:03:20,598 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 12:03:20,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2311 conditions, 987 events. 559/987 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4933 event pairs, 441 based on Foata normal form. 1/584 useless extension candidates. Maximal degree in co-relation 2296. Up to 982 conditions per place. [2023-08-30 12:03:20,603 INFO L137 encePairwiseOnDemand]: 366/369 looper letters, 31 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2023-08-30 12:03:20,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 245 flow [2023-08-30 12:03:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:03:20,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:03:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-30 12:03:20,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46160794941282746 [2023-08-30 12:03:20,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-30 12:03:20,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-30 12:03:20,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:20,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-30 12:03:20,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:20,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:20,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:20,610 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 181 flow. Second operand 3 states and 511 transitions. [2023-08-30 12:03:20,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 245 flow [2023-08-30 12:03:20,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 12:03:20,612 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 182 flow [2023-08-30 12:03:20,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-30 12:03:20,612 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-30 12:03:20,613 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 182 flow [2023-08-30 12:03:20,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:20,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:20,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:20,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:20,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:20,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:20,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:20,819 INFO L85 PathProgramCache]: Analyzing trace with hash -443332278, now seen corresponding path program 1 times [2023-08-30 12:03:20,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:20,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064401784] [2023-08-30 12:03:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:20,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:21,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:21,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064401784] [2023-08-30 12:03:21,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064401784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:21,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:03:21,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 12:03:21,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563251972] [2023-08-30 12:03:21,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:21,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 12:03:21,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:21,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 12:03:21,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 12:03:21,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 369 [2023-08-30 12:03:21,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 150.16666666666666) internal successors, (901), 6 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:21,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:21,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 369 [2023-08-30 12:03:21,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:21,527 INFO L130 PetriNetUnfolder]: 628/1171 cut-off events. [2023-08-30 12:03:21,528 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 12:03:21,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2762 conditions, 1171 events. 628/1171 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6287 event pairs, 510 based on Foata normal form. 24/791 useless extension candidates. Maximal degree in co-relation 2746. Up to 986 conditions per place. [2023-08-30 12:03:21,533 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 40 selfloop transitions, 3 changer transitions 11/54 dead transitions. [2023-08-30 12:03:21,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 363 flow [2023-08-30 12:03:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 12:03:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 12:03:21,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2023-08-30 12:03:21,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276422764227642 [2023-08-30 12:03:21,536 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2023-08-30 12:03:21,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2023-08-30 12:03:21,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:21,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2023-08-30 12:03:21,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:21,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 369.0) internal successors, (2214), 6 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:21,544 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 369.0) internal successors, (2214), 6 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:21,544 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 182 flow. Second operand 5 states and 789 transitions. [2023-08-30 12:03:21,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 363 flow [2023-08-30 12:03:21,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 351 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 12:03:21,546 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 193 flow [2023-08-30 12:03:21,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-30 12:03:21,547 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-08-30 12:03:21,547 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 193 flow [2023-08-30 12:03:21,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 150.16666666666666) internal successors, (901), 6 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:21,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:21,548 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 12:03:21,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 12:03:21,548 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:21,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:21,549 INFO L85 PathProgramCache]: Analyzing trace with hash -442232376, now seen corresponding path program 1 times [2023-08-30 12:03:21,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:21,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926482986] [2023-08-30 12:03:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:21,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:21,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926482986] [2023-08-30 12:03:21,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926482986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:21,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447751492] [2023-08-30 12:03:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:21,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:21,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:21,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:21,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 12:03:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:21,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 12:03:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:21,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:21,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447751492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:21,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:21,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 12:03:21,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674714958] [2023-08-30 12:03:21,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:21,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 12:03:21,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:21,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 12:03:21,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 12:03:21,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2023-08-30 12:03:21,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 193 flow. Second operand has 13 states, 13 states have (on average 161.15384615384616) internal successors, (2095), 13 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:21,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:21,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2023-08-30 12:03:21,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:22,470 INFO L130 PetriNetUnfolder]: 1363/2397 cut-off events. [2023-08-30 12:03:22,470 INFO L131 PetriNetUnfolder]: For 454/454 co-relation queries the response was YES. [2023-08-30 12:03:22,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6481 conditions, 2397 events. 1363/2397 cut-off events. For 454/454 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13274 event pairs, 1071 based on Foata normal form. 12/1563 useless extension candidates. Maximal degree in co-relation 6463. Up to 853 conditions per place. [2023-08-30 12:03:22,486 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 203 selfloop transitions, 31 changer transitions 2/236 dead transitions. [2023-08-30 12:03:22,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 236 transitions, 1401 flow [2023-08-30 12:03:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 12:03:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 12:03:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2162 transitions. [2023-08-30 12:03:22,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488256549232159 [2023-08-30 12:03:22,491 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2162 transitions. [2023-08-30 12:03:22,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2162 transitions. [2023-08-30 12:03:22,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:22,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2162 transitions. [2023-08-30 12:03:22,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 180.16666666666666) internal successors, (2162), 12 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:22,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 369.0) internal successors, (4797), 13 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:22,505 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 369.0) internal successors, (4797), 13 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:22,506 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 193 flow. Second operand 12 states and 2162 transitions. [2023-08-30 12:03:22,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 236 transitions, 1401 flow [2023-08-30 12:03:22,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 236 transitions, 1382 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 12:03:22,511 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 396 flow [2023-08-30 12:03:22,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=396, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-08-30 12:03:22,512 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-08-30 12:03:22,512 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 396 flow [2023-08-30 12:03:22,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 161.15384615384616) internal successors, (2095), 13 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:22,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:22,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:22,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 12:03:22,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:22,719 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:22,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1494750123, now seen corresponding path program 1 times [2023-08-30 12:03:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:22,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985998698] [2023-08-30 12:03:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 12:03:22,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:22,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985998698] [2023-08-30 12:03:22,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985998698] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:22,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:03:22,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 12:03:22,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465564226] [2023-08-30 12:03:22,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:22,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:03:22,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:22,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:03:22,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 12:03:22,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 369 [2023-08-30 12:03:22,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 396 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:22,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:22,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 369 [2023-08-30 12:03:22,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:23,093 INFO L130 PetriNetUnfolder]: 1553/2767 cut-off events. [2023-08-30 12:03:23,093 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-08-30 12:03:23,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7373 conditions, 2767 events. 1553/2767 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16177 event pairs, 555 based on Foata normal form. 80/1981 useless extension candidates. Maximal degree in co-relation 7349. Up to 2133 conditions per place. [2023-08-30 12:03:23,112 INFO L137 encePairwiseOnDemand]: 363/369 looper letters, 60 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2023-08-30 12:03:23,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 545 flow [2023-08-30 12:03:23,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:03:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:03:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-30 12:03:23,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2023-08-30 12:03:23,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-30 12:03:23,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-30 12:03:23,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:23,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-30 12:03:23,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:23,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:23,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:23,119 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 396 flow. Second operand 3 states and 522 transitions. [2023-08-30 12:03:23,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 545 flow [2023-08-30 12:03:23,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 455 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-08-30 12:03:23,123 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 326 flow [2023-08-30 12:03:23,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=326, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2023-08-30 12:03:23,124 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2023-08-30 12:03:23,124 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 326 flow [2023-08-30 12:03:23,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:23,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:23,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:23,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 12:03:23,125 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:23,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:23,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1461847141, now seen corresponding path program 1 times [2023-08-30 12:03:23,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:23,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082524129] [2023-08-30 12:03:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:23,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:23,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082524129] [2023-08-30 12:03:23,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082524129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572079043] [2023-08-30 12:03:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:23,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:23,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:23,214 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:23,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 12:03:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:23,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 12:03:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:23,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:03:23,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572079043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:23,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:03:23,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 12:03:23,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463775203] [2023-08-30 12:03:23,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:23,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:03:23,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:23,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:03:23,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 12:03:23,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 369 [2023-08-30 12:03:23,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 326 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:23,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:23,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 369 [2023-08-30 12:03:23,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:23,568 INFO L130 PetriNetUnfolder]: 1107/1995 cut-off events. [2023-08-30 12:03:23,569 INFO L131 PetriNetUnfolder]: For 986/986 co-relation queries the response was YES. [2023-08-30 12:03:23,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5835 conditions, 1995 events. 1107/1995 cut-off events. For 986/986 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10731 event pairs, 875 based on Foata normal form. 206/1761 useless extension candidates. Maximal degree in co-relation 5810. Up to 1995 conditions per place. [2023-08-30 12:03:23,581 INFO L137 encePairwiseOnDemand]: 366/369 looper letters, 52 selfloop transitions, 1 changer transitions 1/54 dead transitions. [2023-08-30 12:03:23,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 424 flow [2023-08-30 12:03:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:03:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:03:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-30 12:03:23,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2023-08-30 12:03:23,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-30 12:03:23,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-30 12:03:23,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:23,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-30 12:03:23,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:23,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:23,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:23,589 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 326 flow. Second operand 3 states and 516 transitions. [2023-08-30 12:03:23,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 424 flow [2023-08-30 12:03:23,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 412 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 12:03:23,593 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 298 flow [2023-08-30 12:03:23,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2023-08-30 12:03:23,594 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2023-08-30 12:03:23,594 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 298 flow [2023-08-30 12:03:23,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:23,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:23,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:23,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:23,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 12:03:23,800 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:23,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:23,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1938747915, now seen corresponding path program 1 times [2023-08-30 12:03:23,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:23,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383030886] [2023-08-30 12:03:23,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:23,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 12:03:23,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:23,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383030886] [2023-08-30 12:03:23,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383030886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:23,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:03:23,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 12:03:23,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935626903] [2023-08-30 12:03:23,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:23,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:03:23,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:23,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:03:23,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 12:03:23,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 369 [2023-08-30 12:03:23,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:23,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:23,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 369 [2023-08-30 12:03:23,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:24,163 INFO L130 PetriNetUnfolder]: 1112/2037 cut-off events. [2023-08-30 12:03:24,164 INFO L131 PetriNetUnfolder]: For 516/516 co-relation queries the response was YES. [2023-08-30 12:03:24,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5333 conditions, 2037 events. 1112/2037 cut-off events. For 516/516 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11603 event pairs, 550 based on Foata normal form. 60/1657 useless extension candidates. Maximal degree in co-relation 5308. Up to 1611 conditions per place. [2023-08-30 12:03:24,180 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 56 selfloop transitions, 2 changer transitions 4/62 dead transitions. [2023-08-30 12:03:24,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 447 flow [2023-08-30 12:03:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:03:24,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:03:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2023-08-30 12:03:24,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46973803071364045 [2023-08-30 12:03:24,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2023-08-30 12:03:24,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2023-08-30 12:03:24,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:24,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2023-08-30 12:03:24,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:24,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:24,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:24,188 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 298 flow. Second operand 3 states and 520 transitions. [2023-08-30 12:03:24,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 447 flow [2023-08-30 12:03:24,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 12:03:24,192 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 315 flow [2023-08-30 12:03:24,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2023-08-30 12:03:24,193 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2023-08-30 12:03:24,193 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 315 flow [2023-08-30 12:03:24,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:24,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:24,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:24,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 12:03:24,194 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:24,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash -28358383, now seen corresponding path program 1 times [2023-08-30 12:03:24,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:24,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503255372] [2023-08-30 12:03:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:24,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:24,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:24,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503255372] [2023-08-30 12:03:24,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503255372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:24,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408092995] [2023-08-30 12:03:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:24,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:24,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:24,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:24,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 12:03:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:24,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 12:03:24,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 12:03:24,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:03:24,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408092995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:24,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:03:24,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-08-30 12:03:24,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929505957] [2023-08-30 12:03:24,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:24,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 12:03:24,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:24,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 12:03:24,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 12:03:24,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 369 [2023-08-30 12:03:24,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:24,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:24,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 369 [2023-08-30 12:03:24,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:25,107 INFO L130 PetriNetUnfolder]: 1362/2387 cut-off events. [2023-08-30 12:03:25,108 INFO L131 PetriNetUnfolder]: For 946/946 co-relation queries the response was YES. [2023-08-30 12:03:25,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6995 conditions, 2387 events. 1362/2387 cut-off events. For 946/946 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12980 event pairs, 150 based on Foata normal form. 0/1807 useless extension candidates. Maximal degree in co-relation 6968. Up to 1651 conditions per place. [2023-08-30 12:03:25,122 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 60 selfloop transitions, 4 changer transitions 7/71 dead transitions. [2023-08-30 12:03:25,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 516 flow [2023-08-30 12:03:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 12:03:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 12:03:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 666 transitions. [2023-08-30 12:03:25,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2023-08-30 12:03:25,125 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 666 transitions. [2023-08-30 12:03:25,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 666 transitions. [2023-08-30 12:03:25,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:25,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 666 transitions. [2023-08-30 12:03:25,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.5) internal successors, (666), 4 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:25,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:25,130 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:25,130 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 315 flow. Second operand 4 states and 666 transitions. [2023-08-30 12:03:25,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 516 flow [2023-08-30 12:03:25,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 495 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-30 12:03:25,134 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 328 flow [2023-08-30 12:03:25,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-08-30 12:03:25,134 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2023-08-30 12:03:25,135 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 328 flow [2023-08-30 12:03:25,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:25,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:25,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:25,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:25,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:25,341 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:25,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash -118446548, now seen corresponding path program 1 times [2023-08-30 12:03:25,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:25,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737507576] [2023-08-30 12:03:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:25,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:25,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:25,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737507576] [2023-08-30 12:03:25,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737507576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:25,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467605938] [2023-08-30 12:03:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:25,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:25,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:25,937 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:25,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 12:03:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:26,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 12:03:26,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:26,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:03:26,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:03:26,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 12:03:26,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:03:26,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 12:03:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:26,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:26,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:03:26,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 12:03:26,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:03:26,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 12:03:26,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-30 12:03:26,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-08-30 12:03:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:26,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467605938] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:26,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:26,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-30 12:03:26,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286547575] [2023-08-30 12:03:26,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:26,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 12:03:26,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:26,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 12:03:26,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2023-08-30 12:03:27,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 369 [2023-08-30 12:03:27,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 328 flow. Second operand has 20 states, 20 states have (on average 118.65) internal successors, (2373), 20 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:27,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:27,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 369 [2023-08-30 12:03:27,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:28,594 INFO L130 PetriNetUnfolder]: 1459/2543 cut-off events. [2023-08-30 12:03:28,594 INFO L131 PetriNetUnfolder]: For 1207/1207 co-relation queries the response was YES. [2023-08-30 12:03:28,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7574 conditions, 2543 events. 1459/2543 cut-off events. For 1207/1207 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14239 event pairs, 535 based on Foata normal form. 0/1907 useless extension candidates. Maximal degree in co-relation 7546. Up to 1992 conditions per place. [2023-08-30 12:03:28,608 INFO L137 encePairwiseOnDemand]: 356/369 looper letters, 94 selfloop transitions, 33 changer transitions 15/142 dead transitions. [2023-08-30 12:03:28,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 142 transitions, 945 flow [2023-08-30 12:03:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 12:03:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 12:03:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1867 transitions. [2023-08-30 12:03:28,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33730803974706414 [2023-08-30 12:03:28,614 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1867 transitions. [2023-08-30 12:03:28,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1867 transitions. [2023-08-30 12:03:28,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:28,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1867 transitions. [2023-08-30 12:03:28,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 124.46666666666667) internal successors, (1867), 15 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:28,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 369.0) internal successors, (5904), 16 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:28,626 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 369.0) internal successors, (5904), 16 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:28,626 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 328 flow. Second operand 15 states and 1867 transitions. [2023-08-30 12:03:28,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 142 transitions, 945 flow [2023-08-30 12:03:28,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 142 transitions, 926 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 12:03:28,631 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 492 flow [2023-08-30 12:03:28,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=492, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-08-30 12:03:28,632 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2023-08-30 12:03:28,632 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 492 flow [2023-08-30 12:03:28,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 118.65) internal successors, (2373), 20 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:28,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:28,634 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:28,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:28,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:28,840 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:28,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:28,840 INFO L85 PathProgramCache]: Analyzing trace with hash 172004863, now seen corresponding path program 1 times [2023-08-30 12:03:28,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:28,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043653485] [2023-08-30 12:03:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:28,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:29,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:29,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043653485] [2023-08-30 12:03:29,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043653485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434939468] [2023-08-30 12:03:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:29,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:29,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:29,553 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:29,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 12:03:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:29,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 12:03:29,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 12:03:29,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:29,736 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:03:29,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2023-08-30 12:03:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 12:03:29,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434939468] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:29,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 12:03:29,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 3] total 11 [2023-08-30 12:03:29,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980067478] [2023-08-30 12:03:29,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:29,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 12:03:29,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:29,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 12:03:29,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-30 12:03:29,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 369 [2023-08-30 12:03:29,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 492 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:29,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:29,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 369 [2023-08-30 12:03:29,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:30,230 INFO L130 PetriNetUnfolder]: 1805/3074 cut-off events. [2023-08-30 12:03:30,230 INFO L131 PetriNetUnfolder]: For 4916/4916 co-relation queries the response was YES. [2023-08-30 12:03:30,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10781 conditions, 3074 events. 1805/3074 cut-off events. For 4916/4916 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17324 event pairs, 430 based on Foata normal form. 0/2654 useless extension candidates. Maximal degree in co-relation 10749. Up to 2272 conditions per place. [2023-08-30 12:03:30,250 INFO L137 encePairwiseOnDemand]: 363/369 looper letters, 78 selfloop transitions, 12 changer transitions 5/95 dead transitions. [2023-08-30 12:03:30,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 95 transitions, 793 flow [2023-08-30 12:03:30,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 12:03:30,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 12:03:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 669 transitions. [2023-08-30 12:03:30,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532520325203252 [2023-08-30 12:03:30,253 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 669 transitions. [2023-08-30 12:03:30,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 669 transitions. [2023-08-30 12:03:30,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:30,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 669 transitions. [2023-08-30 12:03:30,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:30,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:30,257 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:30,257 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 492 flow. Second operand 4 states and 669 transitions. [2023-08-30 12:03:30,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 95 transitions, 793 flow [2023-08-30 12:03:30,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 747 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-30 12:03:30,275 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 524 flow [2023-08-30 12:03:30,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=524, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-08-30 12:03:30,276 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 37 predicate places. [2023-08-30 12:03:30,276 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 524 flow [2023-08-30 12:03:30,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:30,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:30,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:30,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:30,485 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,SelfDestructingSolverStorable13 [2023-08-30 12:03:30,485 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:30,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:30,486 INFO L85 PathProgramCache]: Analyzing trace with hash -28358382, now seen corresponding path program 1 times [2023-08-30 12:03:30,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:30,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398154271] [2023-08-30 12:03:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:30,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:31,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:31,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398154271] [2023-08-30 12:03:31,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398154271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:31,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058679262] [2023-08-30 12:03:31,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:31,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:31,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:31,173 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:31,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 12:03:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:31,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 12:03:31,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:31,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:31,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:03:31,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 12:03:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:31,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058679262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:31,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:31,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2023-08-30 12:03:31,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488503540] [2023-08-30 12:03:31,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:31,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 12:03:31,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:31,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 12:03:31,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-08-30 12:03:32,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 369 [2023-08-30 12:03:32,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 524 flow. Second operand has 17 states, 17 states have (on average 136.94117647058823) internal successors, (2328), 17 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:32,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:32,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 369 [2023-08-30 12:03:32,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:34,773 INFO L130 PetriNetUnfolder]: 5154/8557 cut-off events. [2023-08-30 12:03:34,773 INFO L131 PetriNetUnfolder]: For 22510/22510 co-relation queries the response was YES. [2023-08-30 12:03:34,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34102 conditions, 8557 events. 5154/8557 cut-off events. For 22510/22510 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 55571 event pairs, 434 based on Foata normal form. 382/7665 useless extension candidates. Maximal degree in co-relation 34071. Up to 3265 conditions per place. [2023-08-30 12:03:34,840 INFO L137 encePairwiseOnDemand]: 356/369 looper letters, 149 selfloop transitions, 108 changer transitions 22/279 dead transitions. [2023-08-30 12:03:34,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 279 transitions, 2383 flow [2023-08-30 12:03:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 12:03:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 12:03:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3960 transitions. [2023-08-30 12:03:34,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2023-08-30 12:03:34,851 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3960 transitions. [2023-08-30 12:03:34,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3960 transitions. [2023-08-30 12:03:34,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:34,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3960 transitions. [2023-08-30 12:03:34,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 141.42857142857142) internal successors, (3960), 28 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:34,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 369.0) internal successors, (10701), 29 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:34,874 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 369.0) internal successors, (10701), 29 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:34,874 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 524 flow. Second operand 28 states and 3960 transitions. [2023-08-30 12:03:34,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 279 transitions, 2383 flow [2023-08-30 12:03:34,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 279 transitions, 2331 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 12:03:34,954 INFO L231 Difference]: Finished difference. Result has 105 places, 180 transitions, 1794 flow [2023-08-30 12:03:34,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1794, PETRI_PLACES=105, PETRI_TRANSITIONS=180} [2023-08-30 12:03:34,955 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 69 predicate places. [2023-08-30 12:03:34,955 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 180 transitions, 1794 flow [2023-08-30 12:03:34,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 136.94117647058823) internal successors, (2328), 17 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:34,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:34,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:34,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 12:03:35,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 12:03:35,162 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:35,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash -118446549, now seen corresponding path program 2 times [2023-08-30 12:03:35,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:35,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55980047] [2023-08-30 12:03:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:35,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:35,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:35,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55980047] [2023-08-30 12:03:35,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55980047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:35,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712123217] [2023-08-30 12:03:35,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:03:35,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:35,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:35,716 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:35,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 12:03:35,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 12:03:35,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:03:35,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 12:03:35,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:35,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:03:35,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:03:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 12:03:35,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:03:35,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712123217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:35,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:03:35,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-30 12:03:35,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528410801] [2023-08-30 12:03:35,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:35,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 12:03:35,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:35,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 12:03:35,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-30 12:03:36,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 369 [2023-08-30 12:03:36,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 180 transitions, 1794 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:36,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:36,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 369 [2023-08-30 12:03:36,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:37,146 INFO L130 PetriNetUnfolder]: 5238/8661 cut-off events. [2023-08-30 12:03:37,146 INFO L131 PetriNetUnfolder]: For 40747/40747 co-relation queries the response was YES. [2023-08-30 12:03:37,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43551 conditions, 8661 events. 5238/8661 cut-off events. For 40747/40747 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 55550 event pairs, 560 based on Foata normal form. 0/7635 useless extension candidates. Maximal degree in co-relation 43513. Up to 6203 conditions per place. [2023-08-30 12:03:37,218 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 122 selfloop transitions, 64 changer transitions 5/191 dead transitions. [2023-08-30 12:03:37,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 191 transitions, 2198 flow [2023-08-30 12:03:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 12:03:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 12:03:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 640 transitions. [2023-08-30 12:03:37,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2023-08-30 12:03:37,222 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 640 transitions. [2023-08-30 12:03:37,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 640 transitions. [2023-08-30 12:03:37,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:37,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 640 transitions. [2023-08-30 12:03:37,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:37,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:37,227 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:37,227 INFO L175 Difference]: Start difference. First operand has 105 places, 180 transitions, 1794 flow. Second operand 4 states and 640 transitions. [2023-08-30 12:03:37,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 191 transitions, 2198 flow [2023-08-30 12:03:37,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 191 transitions, 1945 flow, removed 120 selfloop flow, removed 3 redundant places. [2023-08-30 12:03:37,630 INFO L231 Difference]: Finished difference. Result has 106 places, 171 transitions, 1667 flow [2023-08-30 12:03:37,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1667, PETRI_PLACES=106, PETRI_TRANSITIONS=171} [2023-08-30 12:03:37,632 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 70 predicate places. [2023-08-30 12:03:37,632 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 171 transitions, 1667 flow [2023-08-30 12:03:37,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:37,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:37,633 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:37,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:37,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 12:03:37,839 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:37,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:37,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2089042070, now seen corresponding path program 2 times [2023-08-30 12:03:37,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:37,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676543178] [2023-08-30 12:03:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:37,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:39,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:39,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676543178] [2023-08-30 12:03:39,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676543178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:39,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635147065] [2023-08-30 12:03:39,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:03:39,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:39,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:39,399 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:39,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 12:03:39,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 12:03:39,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:03:39,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 12:03:39,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 12:03:39,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:03:39,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635147065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:39,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:03:39,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 11 [2023-08-30 12:03:39,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348941626] [2023-08-30 12:03:39,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:39,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 12:03:39,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 12:03:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-08-30 12:03:39,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 369 [2023-08-30 12:03:39,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 171 transitions, 1667 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:39,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:39,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 369 [2023-08-30 12:03:39,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:40,671 INFO L130 PetriNetUnfolder]: 4873/8274 cut-off events. [2023-08-30 12:03:40,671 INFO L131 PetriNetUnfolder]: For 44516/44516 co-relation queries the response was YES. [2023-08-30 12:03:40,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40714 conditions, 8274 events. 4873/8274 cut-off events. For 44516/44516 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 55240 event pairs, 630 based on Foata normal form. 356/7586 useless extension candidates. Maximal degree in co-relation 40675. Up to 6536 conditions per place. [2023-08-30 12:03:40,750 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 148 selfloop transitions, 32 changer transitions 5/185 dead transitions. [2023-08-30 12:03:40,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 185 transitions, 2031 flow [2023-08-30 12:03:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 12:03:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 12:03:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 668 transitions. [2023-08-30 12:03:40,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2023-08-30 12:03:40,754 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 668 transitions. [2023-08-30 12:03:40,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 668 transitions. [2023-08-30 12:03:40,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:40,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 668 transitions. [2023-08-30 12:03:40,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.0) internal successors, (668), 4 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) [2023-08-30 12:03:40,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:40,760 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:40,760 INFO L175 Difference]: Start difference. First operand has 106 places, 171 transitions, 1667 flow. Second operand 4 states and 668 transitions. [2023-08-30 12:03:40,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 185 transitions, 2031 flow [2023-08-30 12:03:41,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 185 transitions, 1954 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 12:03:41,173 INFO L231 Difference]: Finished difference. Result has 103 places, 160 transitions, 1507 flow [2023-08-30 12:03:41,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1507, PETRI_PLACES=103, PETRI_TRANSITIONS=160} [2023-08-30 12:03:41,174 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 67 predicate places. [2023-08-30 12:03:41,174 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 160 transitions, 1507 flow [2023-08-30 12:03:41,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:41,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:41,174 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:41,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:41,380 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,SelfDestructingSolverStorable16 [2023-08-30 12:03:41,381 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:41,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:41,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1998953900, now seen corresponding path program 3 times [2023-08-30 12:03:41,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:41,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968209404] [2023-08-30 12:03:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:41,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:42,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:42,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968209404] [2023-08-30 12:03:42,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968209404] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:42,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526781969] [2023-08-30 12:03:42,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 12:03:42,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:42,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:42,530 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:42,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 12:03:42,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 12:03:42,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:03:42,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 12:03:42,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:42,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:03:42,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:03:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 12:03:42,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:03:42,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526781969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:42,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:03:42,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2023-08-30 12:03:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441455882] [2023-08-30 12:03:42,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:42,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 12:03:42,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 12:03:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-08-30 12:03:42,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 369 [2023-08-30 12:03:42,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 160 transitions, 1507 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:42,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:42,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 369 [2023-08-30 12:03:42,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:43,756 INFO L130 PetriNetUnfolder]: 4553/7954 cut-off events. [2023-08-30 12:03:43,756 INFO L131 PetriNetUnfolder]: For 37994/37994 co-relation queries the response was YES. [2023-08-30 12:03:43,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36758 conditions, 7954 events. 4553/7954 cut-off events. For 37994/37994 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 54747 event pairs, 520 based on Foata normal form. 320/7230 useless extension candidates. Maximal degree in co-relation 36721. Up to 5496 conditions per place. [2023-08-30 12:03:43,820 INFO L137 encePairwiseOnDemand]: 365/369 looper letters, 121 selfloop transitions, 48 changer transitions 5/174 dead transitions. [2023-08-30 12:03:43,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 174 transitions, 1874 flow [2023-08-30 12:03:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 12:03:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 12:03:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 639 transitions. [2023-08-30 12:03:43,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2023-08-30 12:03:43,823 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 639 transitions. [2023-08-30 12:03:43,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 639 transitions. [2023-08-30 12:03:43,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:43,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 639 transitions. [2023-08-30 12:03:43,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:43,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:43,827 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:43,827 INFO L175 Difference]: Start difference. First operand has 103 places, 160 transitions, 1507 flow. Second operand 4 states and 639 transitions. [2023-08-30 12:03:43,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 174 transitions, 1874 flow [2023-08-30 12:03:43,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 174 transitions, 1793 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 12:03:43,977 INFO L231 Difference]: Finished difference. Result has 102 places, 154 transitions, 1439 flow [2023-08-30 12:03:43,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1439, PETRI_PLACES=102, PETRI_TRANSITIONS=154} [2023-08-30 12:03:43,978 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 66 predicate places. [2023-08-30 12:03:43,978 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 154 transitions, 1439 flow [2023-08-30 12:03:43,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:43,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:43,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:43,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:44,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 12:03:44,185 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:44,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:44,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1504883493, now seen corresponding path program 1 times [2023-08-30 12:03:44,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:44,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197520566] [2023-08-30 12:03:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:44,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:44,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:44,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197520566] [2023-08-30 12:03:44,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197520566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:44,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976405607] [2023-08-30 12:03:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:44,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:44,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:44,295 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:44,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 12:03:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:44,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 12:03:44,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:44,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:44,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976405607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:44,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:44,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 12:03:44,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474412494] [2023-08-30 12:03:44,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:44,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 12:03:44,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 12:03:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 12:03:44,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 369 [2023-08-30 12:03:44,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 154 transitions, 1439 flow. Second operand has 12 states, 12 states have (on average 152.08333333333334) internal successors, (1825), 12 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:44,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:44,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 369 [2023-08-30 12:03:44,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:45,426 INFO L130 PetriNetUnfolder]: 3406/6077 cut-off events. [2023-08-30 12:03:45,426 INFO L131 PetriNetUnfolder]: For 31319/31319 co-relation queries the response was YES. [2023-08-30 12:03:45,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29353 conditions, 6077 events. 3406/6077 cut-off events. For 31319/31319 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 40454 event pairs, 1464 based on Foata normal form. 142/5479 useless extension candidates. Maximal degree in co-relation 29317. Up to 3881 conditions per place. [2023-08-30 12:03:45,469 INFO L137 encePairwiseOnDemand]: 363/369 looper letters, 156 selfloop transitions, 12 changer transitions 7/175 dead transitions. [2023-08-30 12:03:45,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 175 transitions, 1958 flow [2023-08-30 12:03:45,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 12:03:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 12:03:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1554 transitions. [2023-08-30 12:03:45,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211382113821138 [2023-08-30 12:03:45,472 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1554 transitions. [2023-08-30 12:03:45,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1554 transitions. [2023-08-30 12:03:45,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:45,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1554 transitions. [2023-08-30 12:03:45,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 155.4) internal successors, (1554), 10 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:45,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 369.0) internal successors, (4059), 11 states have internal predecessors, (4059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:45,479 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 369.0) internal successors, (4059), 11 states have internal predecessors, (4059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:45,479 INFO L175 Difference]: Start difference. First operand has 102 places, 154 transitions, 1439 flow. Second operand 10 states and 1554 transitions. [2023-08-30 12:03:45,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 175 transitions, 1958 flow [2023-08-30 12:03:45,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 175 transitions, 1793 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-08-30 12:03:45,584 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1199 flow [2023-08-30 12:03:45,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1199, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2023-08-30 12:03:45,584 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 66 predicate places. [2023-08-30 12:03:45,584 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1199 flow [2023-08-30 12:03:45,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.08333333333334) internal successors, (1825), 12 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:45,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:45,585 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:45,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:45,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:45,786 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:45,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:45,786 INFO L85 PathProgramCache]: Analyzing trace with hash -452073215, now seen corresponding path program 1 times [2023-08-30 12:03:45,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:45,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385138281] [2023-08-30 12:03:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:45,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:45,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385138281] [2023-08-30 12:03:45,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385138281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:45,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083608994] [2023-08-30 12:03:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:45,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:45,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:45,881 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:45,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 12:03:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:45,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 12:03:45,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:46,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:46,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083608994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:46,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:46,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 12:03:46,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018605507] [2023-08-30 12:03:46,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:46,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 12:03:46,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:46,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 12:03:46,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 12:03:46,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 369 [2023-08-30 12:03:46,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1199 flow. Second operand has 12 states, 12 states have (on average 152.41666666666666) internal successors, (1829), 12 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) [2023-08-30 12:03:46,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:46,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 369 [2023-08-30 12:03:46,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:46,939 INFO L130 PetriNetUnfolder]: 3230/5811 cut-off events. [2023-08-30 12:03:46,939 INFO L131 PetriNetUnfolder]: For 23025/23025 co-relation queries the response was YES. [2023-08-30 12:03:46,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25742 conditions, 5811 events. 3230/5811 cut-off events. For 23025/23025 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 38743 event pairs, 1619 based on Foata normal form. 26/5163 useless extension candidates. Maximal degree in co-relation 25707. Up to 5452 conditions per place. [2023-08-30 12:03:46,972 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 121 selfloop transitions, 22 changer transitions 17/160 dead transitions. [2023-08-30 12:03:46,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 160 transitions, 1673 flow [2023-08-30 12:03:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 12:03:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 12:03:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1098 transitions. [2023-08-30 12:03:46,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2023-08-30 12:03:46,974 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1098 transitions. [2023-08-30 12:03:46,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1098 transitions. [2023-08-30 12:03:46,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:46,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1098 transitions. [2023-08-30 12:03:46,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 156.85714285714286) internal successors, (1098), 7 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:46,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 369.0) internal successors, (2952), 8 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:46,979 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 369.0) internal successors, (2952), 8 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:46,979 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1199 flow. Second operand 7 states and 1098 transitions. [2023-08-30 12:03:46,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 160 transitions, 1673 flow [2023-08-30 12:03:47,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 160 transitions, 1661 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 12:03:47,023 INFO L231 Difference]: Finished difference. Result has 105 places, 121 transitions, 1126 flow [2023-08-30 12:03:47,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1126, PETRI_PLACES=105, PETRI_TRANSITIONS=121} [2023-08-30 12:03:47,023 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 69 predicate places. [2023-08-30 12:03:47,024 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 121 transitions, 1126 flow [2023-08-30 12:03:47,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.41666666666666) internal successors, (1829), 12 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) [2023-08-30 12:03:47,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:47,024 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-30 12:03:47,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:47,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:47,230 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:47,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:47,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2010736648, now seen corresponding path program 2 times [2023-08-30 12:03:47,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:47,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788815748] [2023-08-30 12:03:47,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:47,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:47,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:47,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788815748] [2023-08-30 12:03:47,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788815748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:47,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177806976] [2023-08-30 12:03:47,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:03:47,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:47,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:47,416 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:47,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 12:03:47,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 12:03:47,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:03:47,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 12:03:47,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 12:03:47,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:03:47,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177806976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:03:47,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:03:47,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-08-30 12:03:47,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959326504] [2023-08-30 12:03:47,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:03:47,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 12:03:47,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:47,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 12:03:47,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-08-30 12:03:47,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2023-08-30 12:03:47,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 121 transitions, 1126 flow. Second operand has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:47,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:47,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2023-08-30 12:03:47,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:48,183 INFO L130 PetriNetUnfolder]: 3162/5662 cut-off events. [2023-08-30 12:03:48,183 INFO L131 PetriNetUnfolder]: For 23164/23164 co-relation queries the response was YES. [2023-08-30 12:03:48,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25433 conditions, 5662 events. 3162/5662 cut-off events. For 23164/23164 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 37585 event pairs, 1622 based on Foata normal form. 3/4991 useless extension candidates. Maximal degree in co-relation 25397. Up to 5662 conditions per place. [2023-08-30 12:03:48,211 INFO L137 encePairwiseOnDemand]: 367/369 looper letters, 115 selfloop transitions, 1 changer transitions 3/119 dead transitions. [2023-08-30 12:03:48,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 119 transitions, 1307 flow [2023-08-30 12:03:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:03:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:03:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-30 12:03:48,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45347786811201446 [2023-08-30 12:03:48,213 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-30 12:03:48,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-30 12:03:48,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:48,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-30 12:03:48,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:48,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:48,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:48,215 INFO L175 Difference]: Start difference. First operand has 105 places, 121 transitions, 1126 flow. Second operand 3 states and 502 transitions. [2023-08-30 12:03:48,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 119 transitions, 1307 flow [2023-08-30 12:03:48,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 119 transitions, 1187 flow, removed 6 selfloop flow, removed 16 redundant places. [2023-08-30 12:03:48,253 INFO L231 Difference]: Finished difference. Result has 85 places, 116 transitions, 934 flow [2023-08-30 12:03:48,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=934, PETRI_PLACES=85, PETRI_TRANSITIONS=116} [2023-08-30 12:03:48,254 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 49 predicate places. [2023-08-30 12:03:48,254 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 116 transitions, 934 flow [2023-08-30 12:03:48,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:48,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:48,255 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:48,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:48,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:48,461 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:48,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1154182724, now seen corresponding path program 1 times [2023-08-30 12:03:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:48,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194179088] [2023-08-30 12:03:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 12:03:48,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:48,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194179088] [2023-08-30 12:03:48,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194179088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:48,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564598898] [2023-08-30 12:03:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:48,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:48,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:48,558 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:48,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 12:03:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:48,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 12:03:48,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:03:48,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:03:48,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564598898] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:48,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:48,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2023-08-30 12:03:48,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564654404] [2023-08-30 12:03:48,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:48,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 12:03:48,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:48,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 12:03:48,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-30 12:03:49,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 369 [2023-08-30 12:03:49,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 116 transitions, 934 flow. Second operand has 15 states, 15 states have (on average 150.6) internal successors, (2259), 15 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:49,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:49,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 369 [2023-08-30 12:03:49,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:49,810 INFO L130 PetriNetUnfolder]: 4352/7787 cut-off events. [2023-08-30 12:03:49,810 INFO L131 PetriNetUnfolder]: For 25813/25813 co-relation queries the response was YES. [2023-08-30 12:03:49,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34031 conditions, 7787 events. 4352/7787 cut-off events. For 25813/25813 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 53557 event pairs, 972 based on Foata normal form. 198/6981 useless extension candidates. Maximal degree in co-relation 34006. Up to 2657 conditions per place. [2023-08-30 12:03:49,844 INFO L137 encePairwiseOnDemand]: 362/369 looper letters, 112 selfloop transitions, 15 changer transitions 60/187 dead transitions. [2023-08-30 12:03:49,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 187 transitions, 1749 flow [2023-08-30 12:03:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 12:03:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 12:03:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1412 transitions. [2023-08-30 12:03:49,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251731406202951 [2023-08-30 12:03:49,846 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1412 transitions. [2023-08-30 12:03:49,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1412 transitions. [2023-08-30 12:03:49,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:49,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1412 transitions. [2023-08-30 12:03:49,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 156.88888888888889) internal successors, (1412), 9 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:49,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 369.0) internal successors, (3690), 10 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:49,852 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 369.0) internal successors, (3690), 10 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:49,852 INFO L175 Difference]: Start difference. First operand has 85 places, 116 transitions, 934 flow. Second operand 9 states and 1412 transitions. [2023-08-30 12:03:49,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 187 transitions, 1749 flow [2023-08-30 12:03:49,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 187 transitions, 1734 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 12:03:49,886 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 812 flow [2023-08-30 12:03:49,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=812, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2023-08-30 12:03:49,886 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 53 predicate places. [2023-08-30 12:03:49,887 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 812 flow [2023-08-30 12:03:49,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 150.6) internal successors, (2259), 15 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:49,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:49,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:49,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:50,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 12:03:50,094 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:50,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:50,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1536144623, now seen corresponding path program 1 times [2023-08-30 12:03:50,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:50,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239535573] [2023-08-30 12:03:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:50,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 12:03:50,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239535573] [2023-08-30 12:03:50,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239535573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139663993] [2023-08-30 12:03:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:50,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:50,197 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:50,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 12:03:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:50,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 12:03:50,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:03:50,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:03:50,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139663993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:50,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:50,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 15 [2023-08-30 12:03:50,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591288179] [2023-08-30 12:03:50,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:50,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 12:03:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:50,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 12:03:50,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-08-30 12:03:50,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 369 [2023-08-30 12:03:50,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 812 flow. Second operand has 17 states, 17 states have (on average 150.2941176470588) internal successors, (2555), 17 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:50,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:50,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 369 [2023-08-30 12:03:50,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:51,864 INFO L130 PetriNetUnfolder]: 6176/10732 cut-off events. [2023-08-30 12:03:51,865 INFO L131 PetriNetUnfolder]: For 42053/42053 co-relation queries the response was YES. [2023-08-30 12:03:51,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52672 conditions, 10732 events. 6176/10732 cut-off events. For 42053/42053 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 76323 event pairs, 1758 based on Foata normal form. 460/9176 useless extension candidates. Maximal degree in co-relation 52644. Up to 4851 conditions per place. [2023-08-30 12:03:51,952 INFO L137 encePairwiseOnDemand]: 361/369 looper letters, 90 selfloop transitions, 37 changer transitions 36/163 dead transitions. [2023-08-30 12:03:51,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 163 transitions, 1611 flow [2023-08-30 12:03:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 12:03:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 12:03:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1562 transitions. [2023-08-30 12:03:51,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233062330623306 [2023-08-30 12:03:51,955 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1562 transitions. [2023-08-30 12:03:51,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1562 transitions. [2023-08-30 12:03:51,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:51,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1562 transitions. [2023-08-30 12:03:51,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 156.2) internal successors, (1562), 10 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:51,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 369.0) internal successors, (4059), 11 states have internal predecessors, (4059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:51,962 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 369.0) internal successors, (4059), 11 states have internal predecessors, (4059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:51,962 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 812 flow. Second operand 10 states and 1562 transitions. [2023-08-30 12:03:51,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 163 transitions, 1611 flow [2023-08-30 12:03:52,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 163 transitions, 1541 flow, removed 30 selfloop flow, removed 7 redundant places. [2023-08-30 12:03:52,024 INFO L231 Difference]: Finished difference. Result has 82 places, 98 transitions, 935 flow [2023-08-30 12:03:52,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=935, PETRI_PLACES=82, PETRI_TRANSITIONS=98} [2023-08-30 12:03:52,025 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 46 predicate places. [2023-08-30 12:03:52,025 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 98 transitions, 935 flow [2023-08-30 12:03:52,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 150.2941176470588) internal successors, (2555), 17 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:52,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:52,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:52,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:52,226 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:52,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:52,227 INFO L85 PathProgramCache]: Analyzing trace with hash -209386565, now seen corresponding path program 1 times [2023-08-30 12:03:52,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:52,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831635658] [2023-08-30 12:03:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:52,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:03:52,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:52,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831635658] [2023-08-30 12:03:52,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831635658] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:52,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388680393] [2023-08-30 12:03:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:52,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:52,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:52,734 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:52,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 12:03:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:52,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 12:03:52,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:03:53,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:53,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:03:53,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 12:03:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:03:53,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388680393] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:53,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:53,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 26 [2023-08-30 12:03:53,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562355919] [2023-08-30 12:03:53,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:53,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 12:03:53,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:53,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 12:03:53,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2023-08-30 12:03:53,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 369 [2023-08-30 12:03:53,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 98 transitions, 935 flow. Second operand has 28 states, 28 states have (on average 139.67857142857142) internal successors, (3911), 28 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:53,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:53,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 369 [2023-08-30 12:03:53,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:56,195 INFO L130 PetriNetUnfolder]: 8438/14942 cut-off events. [2023-08-30 12:03:56,195 INFO L131 PetriNetUnfolder]: For 82920/82920 co-relation queries the response was YES. [2023-08-30 12:03:56,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80081 conditions, 14942 events. 8438/14942 cut-off events. For 82920/82920 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 114256 event pairs, 1235 based on Foata normal form. 686/12594 useless extension candidates. Maximal degree in co-relation 80054. Up to 4688 conditions per place. [2023-08-30 12:03:56,278 INFO L137 encePairwiseOnDemand]: 356/369 looper letters, 187 selfloop transitions, 104 changer transitions 27/318 dead transitions. [2023-08-30 12:03:56,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 318 transitions, 3346 flow [2023-08-30 12:03:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 12:03:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 12:03:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3935 transitions. [2023-08-30 12:03:56,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949613570209776 [2023-08-30 12:03:56,281 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3935 transitions. [2023-08-30 12:03:56,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3935 transitions. [2023-08-30 12:03:56,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:56,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3935 transitions. [2023-08-30 12:03:56,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 145.74074074074073) internal successors, (3935), 27 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:56,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 369.0) internal successors, (10332), 28 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:56,290 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 369.0) internal successors, (10332), 28 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:56,291 INFO L175 Difference]: Start difference. First operand has 82 places, 98 transitions, 935 flow. Second operand 27 states and 3935 transitions. [2023-08-30 12:03:56,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 318 transitions, 3346 flow [2023-08-30 12:03:56,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 318 transitions, 3233 flow, removed 50 selfloop flow, removed 5 redundant places. [2023-08-30 12:03:56,382 INFO L231 Difference]: Finished difference. Result has 105 places, 157 transitions, 1960 flow [2023-08-30 12:03:56,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1960, PETRI_PLACES=105, PETRI_TRANSITIONS=157} [2023-08-30 12:03:56,383 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 69 predicate places. [2023-08-30 12:03:56,383 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 157 transitions, 1960 flow [2023-08-30 12:03:56,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 139.67857142857142) internal successors, (3911), 28 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:56,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:56,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:56,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:56,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:56,590 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:03:56,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:56,590 INFO L85 PathProgramCache]: Analyzing trace with hash -212067755, now seen corresponding path program 2 times [2023-08-30 12:03:56,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:56,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061870941] [2023-08-30 12:03:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:56,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:03:56,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:56,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061870941] [2023-08-30 12:03:56,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061870941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:56,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809615265] [2023-08-30 12:03:56,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:03:56,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:56,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:56,987 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:57,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 12:03:57,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:03:57,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:03:57,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 12:03:57,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:57,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:03:57,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:03:57,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 12:03:57,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:03:57,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 12:03:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:03:57,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:57,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:03:57,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 12:03:57,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:03:57,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 12:03:57,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-30 12:03:57,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-08-30 12:03:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:03:58,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809615265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:58,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:58,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-30 12:03:58,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119855985] [2023-08-30 12:03:58,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:58,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 12:03:58,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:58,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 12:03:58,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=610, Unknown=1, NotChecked=0, Total=702 [2023-08-30 12:03:59,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 369 [2023-08-30 12:03:59,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 157 transitions, 1960 flow. Second operand has 27 states, 27 states have (on average 112.77777777777777) internal successors, (3045), 27 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:59,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:59,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 369 [2023-08-30 12:03:59,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:04:03,255 INFO L130 PetriNetUnfolder]: 8770/15532 cut-off events. [2023-08-30 12:04:03,255 INFO L131 PetriNetUnfolder]: For 119142/119142 co-relation queries the response was YES. [2023-08-30 12:04:03,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92059 conditions, 15532 events. 8770/15532 cut-off events. For 119142/119142 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 118842 event pairs, 2322 based on Foata normal form. 190/13272 useless extension candidates. Maximal degree in co-relation 92025. Up to 11886 conditions per place. [2023-08-30 12:04:03,373 INFO L137 encePairwiseOnDemand]: 358/369 looper letters, 291 selfloop transitions, 98 changer transitions 36/425 dead transitions. [2023-08-30 12:04:03,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 425 transitions, 5531 flow [2023-08-30 12:04:03,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 12:04:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 12:04:03,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3322 transitions. [2023-08-30 12:04:03,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32152535811072397 [2023-08-30 12:04:03,378 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3322 transitions. [2023-08-30 12:04:03,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3322 transitions. [2023-08-30 12:04:03,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:04:03,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3322 transitions. [2023-08-30 12:04:03,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 118.64285714285714) internal successors, (3322), 28 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:03,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 369.0) internal successors, (10701), 29 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:03,388 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 369.0) internal successors, (10701), 29 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:03,388 INFO L175 Difference]: Start difference. First operand has 105 places, 157 transitions, 1960 flow. Second operand 28 states and 3322 transitions. [2023-08-30 12:04:03,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 425 transitions, 5531 flow [2023-08-30 12:04:03,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 425 transitions, 4816 flow, removed 220 selfloop flow, removed 9 redundant places. [2023-08-30 12:04:03,862 INFO L231 Difference]: Finished difference. Result has 133 places, 209 transitions, 2582 flow [2023-08-30 12:04:03,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2582, PETRI_PLACES=133, PETRI_TRANSITIONS=209} [2023-08-30 12:04:03,862 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 97 predicate places. [2023-08-30 12:04:03,862 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 209 transitions, 2582 flow [2023-08-30 12:04:03,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 112.77777777777777) internal successors, (3045), 27 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:03,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:04:03,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:04:03,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 12:04:04,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:04:04,063 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:04:04,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:04:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash -212067756, now seen corresponding path program 1 times [2023-08-30 12:04:04,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:04:04,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302179772] [2023-08-30 12:04:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:04:04,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:04:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:04:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:04:04,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:04:04,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302179772] [2023-08-30 12:04:04,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302179772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:04:04,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500699528] [2023-08-30 12:04:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:04:04,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:04:04,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:04:04,592 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:04:04,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 12:04:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:04:04,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 12:04:04,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:04:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 12:04:04,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:04:04,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:04,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-08-30 12:04:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 12:04:04,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500699528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:04:04,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:04:04,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 3] total 12 [2023-08-30 12:04:04,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127056513] [2023-08-30 12:04:04,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:04:04,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 12:04:04,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:04:04,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 12:04:04,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-08-30 12:04:05,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 369 [2023-08-30 12:04:05,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 209 transitions, 2582 flow. Second operand has 14 states, 14 states have (on average 145.35714285714286) internal successors, (2035), 14 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:05,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:04:05,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 369 [2023-08-30 12:04:05,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:04:07,314 INFO L130 PetriNetUnfolder]: 8147/14691 cut-off events. [2023-08-30 12:04:07,314 INFO L131 PetriNetUnfolder]: For 128597/128597 co-relation queries the response was YES. [2023-08-30 12:04:07,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84484 conditions, 14691 events. 8147/14691 cut-off events. For 128597/128597 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 112640 event pairs, 2244 based on Foata normal form. 0/13403 useless extension candidates. Maximal degree in co-relation 84441. Up to 4957 conditions per place. [2023-08-30 12:04:07,429 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 144 selfloop transitions, 105 changer transitions 29/278 dead transitions. [2023-08-30 12:04:07,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 278 transitions, 3546 flow [2023-08-30 12:04:07,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 12:04:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 12:04:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2559 transitions. [2023-08-30 12:04:07,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40793878527020566 [2023-08-30 12:04:07,432 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2559 transitions. [2023-08-30 12:04:07,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2559 transitions. [2023-08-30 12:04:07,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:04:07,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2559 transitions. [2023-08-30 12:04:07,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 150.52941176470588) internal successors, (2559), 17 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:07,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 369.0) internal successors, (6642), 18 states have internal predecessors, (6642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:07,438 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 369.0) internal successors, (6642), 18 states have internal predecessors, (6642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:07,438 INFO L175 Difference]: Start difference. First operand has 133 places, 209 transitions, 2582 flow. Second operand 17 states and 2559 transitions. [2023-08-30 12:04:07,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 278 transitions, 3546 flow [2023-08-30 12:04:07,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 278 transitions, 3486 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-08-30 12:04:07,915 INFO L231 Difference]: Finished difference. Result has 143 places, 182 transitions, 2402 flow [2023-08-30 12:04:07,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2402, PETRI_PLACES=143, PETRI_TRANSITIONS=182} [2023-08-30 12:04:07,916 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 107 predicate places. [2023-08-30 12:04:07,916 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 182 transitions, 2402 flow [2023-08-30 12:04:07,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 145.35714285714286) internal successors, (2035), 14 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:07,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:04:07,916 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:04:07,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-30 12:04:08,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 12:04:08,117 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:04:08,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:04:08,117 INFO L85 PathProgramCache]: Analyzing trace with hash -872234095, now seen corresponding path program 3 times [2023-08-30 12:04:08,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:04:08,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953476293] [2023-08-30 12:04:08,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:04:08,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:04:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:04:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:04:09,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:04:09,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953476293] [2023-08-30 12:04:09,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953476293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:04:09,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358468419] [2023-08-30 12:04:09,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 12:04:09,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:04:09,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:04:09,339 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:04:09,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 12:04:09,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 12:04:09,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:04:09,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 12:04:09,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:04:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 12:04:09,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:04:09,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:09,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 12:04:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 12:04:09,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358468419] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:04:09,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:04:09,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 20 [2023-08-30 12:04:09,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001021017] [2023-08-30 12:04:09,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:04:09,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 12:04:09,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:04:09,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 12:04:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2023-08-30 12:04:11,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 369 [2023-08-30 12:04:11,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 182 transitions, 2402 flow. Second operand has 22 states, 22 states have (on average 134.72727272727272) internal successors, (2964), 22 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:11,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:04:11,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 369 [2023-08-30 12:04:11,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:04:13,730 INFO L130 PetriNetUnfolder]: 7984/14416 cut-off events. [2023-08-30 12:04:13,731 INFO L131 PetriNetUnfolder]: For 159713/159713 co-relation queries the response was YES. [2023-08-30 12:04:13,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85743 conditions, 14416 events. 7984/14416 cut-off events. For 159713/159713 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 111317 event pairs, 2079 based on Foata normal form. 518/13736 useless extension candidates. Maximal degree in co-relation 85698. Up to 4813 conditions per place. [2023-08-30 12:04:13,856 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 166 selfloop transitions, 201 changer transitions 32/399 dead transitions. [2023-08-30 12:04:13,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 399 transitions, 5627 flow [2023-08-30 12:04:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 12:04:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 12:04:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3075 transitions. [2023-08-30 12:04:13,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2023-08-30 12:04:13,859 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3075 transitions. [2023-08-30 12:04:13,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3075 transitions. [2023-08-30 12:04:13,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:04:13,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3075 transitions. [2023-08-30 12:04:13,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 139.77272727272728) internal successors, (3075), 22 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:13,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 369.0) internal successors, (8487), 23 states have internal predecessors, (8487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:13,866 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 369.0) internal successors, (8487), 23 states have internal predecessors, (8487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:13,866 INFO L175 Difference]: Start difference. First operand has 143 places, 182 transitions, 2402 flow. Second operand 22 states and 3075 transitions. [2023-08-30 12:04:13,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 399 transitions, 5627 flow [2023-08-30 12:04:14,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 399 transitions, 5479 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-08-30 12:04:14,227 INFO L231 Difference]: Finished difference. Result has 162 places, 287 transitions, 4494 flow [2023-08-30 12:04:14,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4494, PETRI_PLACES=162, PETRI_TRANSITIONS=287} [2023-08-30 12:04:14,228 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 126 predicate places. [2023-08-30 12:04:14,228 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 287 transitions, 4494 flow [2023-08-30 12:04:14,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 134.72727272727272) internal successors, (2964), 22 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:14,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:04:14,229 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:04:14,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-30 12:04:14,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 12:04:14,429 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:04:14,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:04:14,430 INFO L85 PathProgramCache]: Analyzing trace with hash -211808290, now seen corresponding path program 1 times [2023-08-30 12:04:14,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:04:14,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613980223] [2023-08-30 12:04:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:04:14,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:04:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:04:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:04:16,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:04:16,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613980223] [2023-08-30 12:04:16,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613980223] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:04:16,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398347289] [2023-08-30 12:04:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:04:16,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:04:16,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:04:16,126 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:04:16,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 12:04:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:04:16,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 12:04:16,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:04:16,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:04:16,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:04:16,288 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 12:04:16,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 12:04:16,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:04:16,459 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 12:04:16,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 12:04:16,506 INFO L350 Elim1Store]: Elim1 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 [2023-08-30 12:04:16,530 INFO L350 Elim1Store]: Elim1 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 [2023-08-30 12:04:16,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:04:16,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:04:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:04:16,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:04:17,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:17,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 55 [2023-08-30 12:04:17,319 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:17,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 293 [2023-08-30 12:04:17,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:17,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 237 [2023-08-30 12:04:17,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:17,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 209 [2023-08-30 12:04:17,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:17,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 101 [2023-08-30 12:04:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:04:18,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398347289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:04:18,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:04:18,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 34 [2023-08-30 12:04:18,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352302440] [2023-08-30 12:04:18,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:04:18,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 12:04:18,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:04:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 12:04:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1062, Unknown=14, NotChecked=0, Total=1260 [2023-08-30 12:04:20,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 369 [2023-08-30 12:04:20,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 287 transitions, 4494 flow. Second operand has 36 states, 36 states have (on average 93.41666666666667) internal successors, (3363), 36 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:20,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:04:20,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 369 [2023-08-30 12:04:20,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:04:40,558 INFO L130 PetriNetUnfolder]: 16619/29586 cut-off events. [2023-08-30 12:04:40,558 INFO L131 PetriNetUnfolder]: For 332567/332567 co-relation queries the response was YES. [2023-08-30 12:04:40,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181558 conditions, 29586 events. 16619/29586 cut-off events. For 332567/332567 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 252254 event pairs, 2831 based on Foata normal form. 20/27332 useless extension candidates. Maximal degree in co-relation 181505. Up to 14259 conditions per place. [2023-08-30 12:04:40,942 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 488 selfloop transitions, 107 changer transitions 36/631 dead transitions. [2023-08-30 12:04:40,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 631 transitions, 10116 flow [2023-08-30 12:04:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 12:04:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 12:04:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3440 transitions. [2023-08-30 12:04:40,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26635694928377857 [2023-08-30 12:04:40,947 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3440 transitions. [2023-08-30 12:04:40,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3440 transitions. [2023-08-30 12:04:40,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:04:40,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3440 transitions. [2023-08-30 12:04:40,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 98.28571428571429) internal successors, (3440), 35 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:40,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 369.0) internal successors, (13284), 36 states have internal predecessors, (13284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:40,962 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 369.0) internal successors, (13284), 36 states have internal predecessors, (13284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:40,962 INFO L175 Difference]: Start difference. First operand has 162 places, 287 transitions, 4494 flow. Second operand 35 states and 3440 transitions. [2023-08-30 12:04:40,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 631 transitions, 10116 flow [2023-08-30 12:04:43,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 631 transitions, 9895 flow, removed 103 selfloop flow, removed 3 redundant places. [2023-08-30 12:04:43,514 INFO L231 Difference]: Finished difference. Result has 207 places, 370 transitions, 6036 flow [2023-08-30 12:04:43,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=4305, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6036, PETRI_PLACES=207, PETRI_TRANSITIONS=370} [2023-08-30 12:04:43,514 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 171 predicate places. [2023-08-30 12:04:43,515 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 370 transitions, 6036 flow [2023-08-30 12:04:43,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 93.41666666666667) internal successors, (3363), 36 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:43,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:04:43,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:04:43,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 12:04:43,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 12:04:43,723 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:04:43,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:04:43,723 INFO L85 PathProgramCache]: Analyzing trace with hash -215319969, now seen corresponding path program 1 times [2023-08-30 12:04:43,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:04:43,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098269827] [2023-08-30 12:04:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:04:43,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:04:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:04:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:04:46,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:04:46,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098269827] [2023-08-30 12:04:46,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098269827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:04:46,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374306932] [2023-08-30 12:04:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:04:46,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:04:46,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:04:46,982 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:04:46,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 12:04:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:04:47,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 12:04:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:04:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:04:48,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:04:48,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:48,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 12:04:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:04:49,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374306932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:04:49,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:04:49,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 30 [2023-08-30 12:04:49,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366049782] [2023-08-30 12:04:49,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:04:49,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 12:04:49,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:04:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 12:04:49,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2023-08-30 12:05:01,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 369 [2023-08-30 12:05:01,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 370 transitions, 6036 flow. Second operand has 32 states, 32 states have (on average 130.53125) internal successors, (4177), 32 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:01,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:05:01,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 369 [2023-08-30 12:05:01,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:05:14,334 INFO L130 PetriNetUnfolder]: 13288/25053 cut-off events. [2023-08-30 12:05:14,334 INFO L131 PetriNetUnfolder]: For 380684/380684 co-relation queries the response was YES. [2023-08-30 12:05:14,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159144 conditions, 25053 events. 13288/25053 cut-off events. For 380684/380684 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 221983 event pairs, 2357 based on Foata normal form. 1392/25253 useless extension candidates. Maximal degree in co-relation 159076. Up to 7298 conditions per place. [2023-08-30 12:05:14,776 INFO L137 encePairwiseOnDemand]: 355/369 looper letters, 324 selfloop transitions, 179 changer transitions 92/595 dead transitions. [2023-08-30 12:05:14,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 595 transitions, 9623 flow [2023-08-30 12:05:14,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 12:05:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 12:05:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4475 transitions. [2023-08-30 12:05:14,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674960992034163 [2023-08-30 12:05:14,790 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4475 transitions. [2023-08-30 12:05:14,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4475 transitions. [2023-08-30 12:05:14,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:05:14,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4475 transitions. [2023-08-30 12:05:14,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 135.6060606060606) internal successors, (4475), 33 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:14,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 369.0) internal successors, (12546), 34 states have internal predecessors, (12546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:14,816 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 369.0) internal successors, (12546), 34 states have internal predecessors, (12546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:14,817 INFO L175 Difference]: Start difference. First operand has 207 places, 370 transitions, 6036 flow. Second operand 33 states and 4475 transitions. [2023-08-30 12:05:14,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 595 transitions, 9623 flow [2023-08-30 12:05:17,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 595 transitions, 9341 flow, removed 133 selfloop flow, removed 11 redundant places. [2023-08-30 12:05:17,833 INFO L231 Difference]: Finished difference. Result has 232 places, 354 transitions, 6092 flow [2023-08-30 12:05:17,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=4905, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6092, PETRI_PLACES=232, PETRI_TRANSITIONS=354} [2023-08-30 12:05:17,834 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 196 predicate places. [2023-08-30 12:05:17,834 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 354 transitions, 6092 flow [2023-08-30 12:05:17,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 130.53125) internal successors, (4177), 32 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:17,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:05:17,835 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:05:17,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 12:05:18,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:05:18,036 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:05:18,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:05:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash -215319966, now seen corresponding path program 2 times [2023-08-30 12:05:18,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:05:18,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208240639] [2023-08-30 12:05:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:05:18,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:05:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:05:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:05:18,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:05:18,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208240639] [2023-08-30 12:05:18,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208240639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:05:18,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348912793] [2023-08-30 12:05:18,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:05:18,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:05:18,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:05:18,960 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:05:18,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 12:05:19,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:05:19,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:05:19,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 12:05:19,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:05:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:05:20,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:05:20,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:05:20,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-08-30 12:05:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:05:21,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348912793] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:05:21,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:05:21,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 12:05:21,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388105546] [2023-08-30 12:05:21,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:05:21,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 12:05:21,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:05:21,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 12:05:21,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-08-30 12:05:26,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 369 [2023-08-30 12:05:27,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 354 transitions, 6092 flow. Second operand has 25 states, 25 states have (on average 139.84) internal successors, (3496), 25 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:27,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:05:27,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 369 [2023-08-30 12:05:27,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:05:35,407 INFO L130 PetriNetUnfolder]: 12335/23238 cut-off events. [2023-08-30 12:05:35,408 INFO L131 PetriNetUnfolder]: For 367739/367739 co-relation queries the response was YES. [2023-08-30 12:05:35,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156072 conditions, 23238 events. 12335/23238 cut-off events. For 367739/367739 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 203337 event pairs, 3511 based on Foata normal form. 98/22654 useless extension candidates. Maximal degree in co-relation 155999. Up to 18822 conditions per place. [2023-08-30 12:05:35,723 INFO L137 encePairwiseOnDemand]: 360/369 looper letters, 300 selfloop transitions, 131 changer transitions 60/491 dead transitions. [2023-08-30 12:05:35,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 491 transitions, 8417 flow [2023-08-30 12:05:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 12:05:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 12:05:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3190 transitions. [2023-08-30 12:05:35,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2023-08-30 12:05:35,728 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3190 transitions. [2023-08-30 12:05:35,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3190 transitions. [2023-08-30 12:05:35,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:05:35,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3190 transitions. [2023-08-30 12:05:35,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 145.0) internal successors, (3190), 22 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:35,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 369.0) internal successors, (8487), 23 states have internal predecessors, (8487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:35,740 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 369.0) internal successors, (8487), 23 states have internal predecessors, (8487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:35,740 INFO L175 Difference]: Start difference. First operand has 232 places, 354 transitions, 6092 flow. Second operand 22 states and 3190 transitions. [2023-08-30 12:05:35,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 491 transitions, 8417 flow [2023-08-30 12:05:37,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 491 transitions, 7813 flow, removed 141 selfloop flow, removed 15 redundant places. [2023-08-30 12:05:37,982 INFO L231 Difference]: Finished difference. Result has 241 places, 349 transitions, 5996 flow [2023-08-30 12:05:37,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5676, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5996, PETRI_PLACES=241, PETRI_TRANSITIONS=349} [2023-08-30 12:05:37,983 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 205 predicate places. [2023-08-30 12:05:37,983 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 349 transitions, 5996 flow [2023-08-30 12:05:37,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 139.84) internal successors, (3496), 25 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:37,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:05:37,983 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:05:37,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 12:05:38,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:05:38,184 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:05:38,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:05:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash -211808289, now seen corresponding path program 2 times [2023-08-30 12:05:38,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:05:38,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794724492] [2023-08-30 12:05:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:05:38,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:05:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:05:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:05:39,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:05:39,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794724492] [2023-08-30 12:05:39,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794724492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:05:39,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388404847] [2023-08-30 12:05:39,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:05:39,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:05:39,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:05:39,272 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:05:39,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 12:05:39,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:05:39,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:05:39,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 12:05:39,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:05:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 12:05:39,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:05:39,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:05:39,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-30 12:05:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:05:40,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388404847] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:05:40,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:05:40,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 5] total 18 [2023-08-30 12:05:40,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454987447] [2023-08-30 12:05:40,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:05:40,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 12:05:40,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:05:40,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 12:05:40,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-08-30 12:05:43,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 369 [2023-08-30 12:05:43,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 349 transitions, 5996 flow. Second operand has 20 states, 20 states have (on average 138.85) internal successors, (2777), 20 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:43,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:05:43,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 369 [2023-08-30 12:05:43,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:05:50,373 INFO L130 PetriNetUnfolder]: 13920/25905 cut-off events. [2023-08-30 12:05:50,373 INFO L131 PetriNetUnfolder]: For 456446/456446 co-relation queries the response was YES. [2023-08-30 12:05:50,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177035 conditions, 25905 events. 13920/25905 cut-off events. For 456446/456446 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 226545 event pairs, 3275 based on Foata normal form. 320/25511 useless extension candidates. Maximal degree in co-relation 176961. Up to 9413 conditions per place. [2023-08-30 12:05:50,666 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 293 selfloop transitions, 163 changer transitions 16/472 dead transitions. [2023-08-30 12:05:50,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 472 transitions, 8693 flow [2023-08-30 12:05:50,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 12:05:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 12:05:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2301 transitions. [2023-08-30 12:05:50,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38973577235772355 [2023-08-30 12:05:50,671 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2301 transitions. [2023-08-30 12:05:50,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2301 transitions. [2023-08-30 12:05:50,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:05:50,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2301 transitions. [2023-08-30 12:05:50,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 143.8125) internal successors, (2301), 16 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:50,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 369.0) internal successors, (6273), 17 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:50,678 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 369.0) internal successors, (6273), 17 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:50,678 INFO L175 Difference]: Start difference. First operand has 241 places, 349 transitions, 5996 flow. Second operand 16 states and 2301 transitions. [2023-08-30 12:05:50,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 472 transitions, 8693 flow [2023-08-30 12:05:53,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 472 transitions, 8153 flow, removed 153 selfloop flow, removed 16 redundant places. [2023-08-30 12:05:53,294 INFO L231 Difference]: Finished difference. Result has 238 places, 363 transitions, 6458 flow [2023-08-30 12:05:53,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5399, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6458, PETRI_PLACES=238, PETRI_TRANSITIONS=363} [2023-08-30 12:05:53,295 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 202 predicate places. [2023-08-30 12:05:53,295 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 363 transitions, 6458 flow [2023-08-30 12:05:53,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 138.85) internal successors, (2777), 20 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:53,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:05:53,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:05:53,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 12:05:53,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 12:05:53,496 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:05:53,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:05:53,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2067495335, now seen corresponding path program 3 times [2023-08-30 12:05:53,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:05:53,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941519275] [2023-08-30 12:05:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:05:53,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:05:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:05:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:05:54,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:05:54,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941519275] [2023-08-30 12:05:54,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941519275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:05:54,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658122306] [2023-08-30 12:05:54,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 12:05:54,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:05:54,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:05:54,329 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:05:54,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 12:05:54,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 12:05:54,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:05:54,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 12:05:54,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:05:54,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 12:05:55,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 12:05:55,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:05:55,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:05:55,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:05:55,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:05:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:05:56,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:05:59,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:05:59,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 78 [2023-08-30 12:05:59,391 INFO L321 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2023-08-30 12:05:59,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1060 treesize of output 996 [2023-08-30 12:05:59,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:05:59,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 405 treesize of output 391 [2023-08-30 12:05:59,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:05:59,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 362 treesize of output 294 [2023-08-30 12:06:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:06:15,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658122306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:06:15,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:06:15,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 36 [2023-08-30 12:06:15,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290703127] [2023-08-30 12:06:15,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:06:15,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 12:06:15,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:06:15,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 12:06:15,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1205, Unknown=2, NotChecked=0, Total=1406 [2023-08-30 12:06:19,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 369 [2023-08-30 12:06:19,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 363 transitions, 6458 flow. Second operand has 38 states, 38 states have (on average 103.3157894736842) internal successors, (3926), 38 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:06:19,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:06:19,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 369 [2023-08-30 12:06:19,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:06:50,163 WARN L222 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 139 DAG size of output: 136 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:06:55,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:07:01,205 INFO L130 PetriNetUnfolder]: 13660/25431 cut-off events. [2023-08-30 12:07:01,205 INFO L131 PetriNetUnfolder]: For 468903/468903 co-relation queries the response was YES. [2023-08-30 12:07:01,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180300 conditions, 25431 events. 13660/25431 cut-off events. For 468903/468903 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 221780 event pairs, 4317 based on Foata normal form. 96/24787 useless extension candidates. Maximal degree in co-relation 180225. Up to 20146 conditions per place. [2023-08-30 12:07:01,906 INFO L137 encePairwiseOnDemand]: 358/369 looper letters, 320 selfloop transitions, 52 changer transitions 111/483 dead transitions. [2023-08-30 12:07:01,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 483 transitions, 7989 flow [2023-08-30 12:07:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 12:07:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 12:07:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4470 transitions. [2023-08-30 12:07:01,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2884243128145567 [2023-08-30 12:07:01,912 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4470 transitions. [2023-08-30 12:07:01,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4470 transitions. [2023-08-30 12:07:01,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:07:01,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4470 transitions. [2023-08-30 12:07:01,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 106.42857142857143) internal successors, (4470), 42 states have internal predecessors, (4470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:01,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 369.0) internal successors, (15867), 43 states have internal predecessors, (15867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:01,928 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 369.0) internal successors, (15867), 43 states have internal predecessors, (15867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:01,928 INFO L175 Difference]: Start difference. First operand has 238 places, 363 transitions, 6458 flow. Second operand 42 states and 4470 transitions. [2023-08-30 12:07:01,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 483 transitions, 7989 flow [2023-08-30 12:07:05,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 483 transitions, 7794 flow, removed 75 selfloop flow, removed 9 redundant places. [2023-08-30 12:07:05,053 INFO L231 Difference]: Finished difference. Result has 271 places, 331 transitions, 5786 flow [2023-08-30 12:07:05,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5786, PETRI_PLACES=271, PETRI_TRANSITIONS=331} [2023-08-30 12:07:05,053 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 235 predicate places. [2023-08-30 12:07:05,054 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 331 transitions, 5786 flow [2023-08-30 12:07:05,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 103.3157894736842) internal successors, (3926), 38 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:05,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:07:05,055 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:07:05,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 12:07:05,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 12:07:05,255 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:07:05,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:07:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1315715937, now seen corresponding path program 2 times [2023-08-30 12:07:05,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:07:05,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551034415] [2023-08-30 12:07:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:07:05,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:07:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:07:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:07:06,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:07:06,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551034415] [2023-08-30 12:07:06,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551034415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:07:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336990992] [2023-08-30 12:07:06,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:07:06,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:07:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:07:06,546 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:07:06,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 12:07:06,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:07:06,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:07:06,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 12:07:06,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:07:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:07:07,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:07:07,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:07:07,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-08-30 12:07:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 12:07:07,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336990992] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:07:07,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:07:07,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 3] total 13 [2023-08-30 12:07:07,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697663087] [2023-08-30 12:07:07,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:07:07,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 12:07:07,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:07:07,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 12:07:07,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-08-30 12:07:10,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 369 [2023-08-30 12:07:10,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 331 transitions, 5786 flow. Second operand has 15 states, 15 states have (on average 145.26666666666668) internal successors, (2179), 15 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:10,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:07:10,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 369 [2023-08-30 12:07:10,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:07:18,346 INFO L130 PetriNetUnfolder]: 17478/32388 cut-off events. [2023-08-30 12:07:18,346 INFO L131 PetriNetUnfolder]: For 552002/552002 co-relation queries the response was YES. [2023-08-30 12:07:18,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221516 conditions, 32388 events. 17478/32388 cut-off events. For 552002/552002 co-relation queries the response was YES. Maximal size of possible extension queue 1305. Compared 290810 event pairs, 4031 based on Foata normal form. 508/32398 useless extension candidates. Maximal degree in co-relation 221438. Up to 11824 conditions per place. [2023-08-30 12:07:18,784 INFO L137 encePairwiseOnDemand]: 361/369 looper letters, 412 selfloop transitions, 124 changer transitions 38/574 dead transitions. [2023-08-30 12:07:18,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 574 transitions, 10742 flow [2023-08-30 12:07:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 12:07:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 12:07:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2698 transitions. [2023-08-30 12:07:18,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4062029509183981 [2023-08-30 12:07:18,787 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2698 transitions. [2023-08-30 12:07:18,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2698 transitions. [2023-08-30 12:07:18,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:07:18,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2698 transitions. [2023-08-30 12:07:18,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 149.88888888888889) internal successors, (2698), 18 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:18,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 369.0) internal successors, (7011), 19 states have internal predecessors, (7011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:18,796 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 369.0) internal successors, (7011), 19 states have internal predecessors, (7011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:18,797 INFO L175 Difference]: Start difference. First operand has 271 places, 331 transitions, 5786 flow. Second operand 18 states and 2698 transitions. [2023-08-30 12:07:18,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 574 transitions, 10742 flow [2023-08-30 12:07:22,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 574 transitions, 10594 flow, removed 25 selfloop flow, removed 21 redundant places. [2023-08-30 12:07:22,779 INFO L231 Difference]: Finished difference. Result has 243 places, 336 transitions, 5932 flow [2023-08-30 12:07:22,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5932, PETRI_PLACES=243, PETRI_TRANSITIONS=336} [2023-08-30 12:07:22,780 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 207 predicate places. [2023-08-30 12:07:22,780 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 336 transitions, 5932 flow [2023-08-30 12:07:22,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 145.26666666666668) internal successors, (2179), 15 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:22,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:07:22,781 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:07:22,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 12:07:22,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:07:22,981 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:07:22,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:07:22,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1123847034, now seen corresponding path program 4 times [2023-08-30 12:07:22,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:07:22,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068382857] [2023-08-30 12:07:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:07:22,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:07:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:07:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:07:24,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:07:24,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068382857] [2023-08-30 12:07:24,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068382857] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:07:24,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059159157] [2023-08-30 12:07:24,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 12:07:24,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:07:24,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:07:24,682 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:07:24,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 12:07:24,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 12:07:24,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:07:24,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 12:07:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:07:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 12:07:25,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:07:25,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:07:25,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 12:07:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 12:07:25,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059159157] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:07:25,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:07:25,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 5] total 21 [2023-08-30 12:07:25,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100445718] [2023-08-30 12:07:25,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:07:25,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 12:07:25,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:07:25,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 12:07:25,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-08-30 12:07:31,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 369 [2023-08-30 12:07:31,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 336 transitions, 5932 flow. Second operand has 23 states, 23 states have (on average 138.7826086956522) internal successors, (3192), 23 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:31,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:07:31,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 369 [2023-08-30 12:07:31,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:07:40,225 INFO L130 PetriNetUnfolder]: 16737/30733 cut-off events. [2023-08-30 12:07:40,225 INFO L131 PetriNetUnfolder]: For 531664/531664 co-relation queries the response was YES. [2023-08-30 12:07:40,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210007 conditions, 30733 events. 16737/30733 cut-off events. For 531664/531664 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 272428 event pairs, 3899 based on Foata normal form. 664/30947 useless extension candidates. Maximal degree in co-relation 209931. Up to 11525 conditions per place. [2023-08-30 12:07:40,725 INFO L137 encePairwiseOnDemand]: 361/369 looper letters, 324 selfloop transitions, 131 changer transitions 38/493 dead transitions. [2023-08-30 12:07:40,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 493 transitions, 8940 flow [2023-08-30 12:07:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 12:07:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 12:07:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3004 transitions. [2023-08-30 12:07:40,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3876629242482901 [2023-08-30 12:07:40,729 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3004 transitions. [2023-08-30 12:07:40,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3004 transitions. [2023-08-30 12:07:40,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:07:40,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3004 transitions. [2023-08-30 12:07:40,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 143.04761904761904) internal successors, (3004), 21 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:40,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 369.0) internal successors, (8118), 22 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:40,737 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 369.0) internal successors, (8118), 22 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:40,737 INFO L175 Difference]: Start difference. First operand has 243 places, 336 transitions, 5932 flow. Second operand 21 states and 3004 transitions. [2023-08-30 12:07:40,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 493 transitions, 8940 flow [2023-08-30 12:07:44,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 493 transitions, 8686 flow, removed 51 selfloop flow, removed 10 redundant places. [2023-08-30 12:07:44,698 INFO L231 Difference]: Finished difference. Result has 249 places, 325 transitions, 5830 flow [2023-08-30 12:07:44,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5205, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5830, PETRI_PLACES=249, PETRI_TRANSITIONS=325} [2023-08-30 12:07:44,699 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 213 predicate places. [2023-08-30 12:07:44,699 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 325 transitions, 5830 flow [2023-08-30 12:07:44,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 138.7826086956522) internal successors, (3192), 23 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:07:44,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:07:44,700 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:07:44,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 12:07:44,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:07:44,901 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:07:44,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:07:44,901 INFO L85 PathProgramCache]: Analyzing trace with hash -778404061, now seen corresponding path program 4 times [2023-08-30 12:07:44,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:07:44,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107486975] [2023-08-30 12:07:44,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:07:44,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:07:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:07:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:07:50,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:07:50,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107486975] [2023-08-30 12:07:50,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107486975] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:07:50,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472156588] [2023-08-30 12:07:50,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 12:07:50,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:07:50,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:07:50,056 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:07:50,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 12:07:50,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 12:07:50,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:07:50,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 12:07:50,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:07:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:07:50,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:07:51,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:07:51,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-30 12:07:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 12:07:51,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472156588] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:07:51,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:07:51,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 5] total 26 [2023-08-30 12:07:51,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293382335] [2023-08-30 12:07:51,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:07:51,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 12:07:51,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:07:51,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 12:07:51,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2023-08-30 12:08:06,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 369 [2023-08-30 12:08:06,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 325 transitions, 5830 flow. Second operand has 28 states, 28 states have (on average 126.5) internal successors, (3542), 28 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:06,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:08:06,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 369 [2023-08-30 12:08:06,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:08:22,353 INFO L130 PetriNetUnfolder]: 17429/31705 cut-off events. [2023-08-30 12:08:22,353 INFO L131 PetriNetUnfolder]: For 571053/571053 co-relation queries the response was YES. [2023-08-30 12:08:22,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222278 conditions, 31705 events. 17429/31705 cut-off events. For 571053/571053 co-relation queries the response was YES. Maximal size of possible extension queue 1316. Compared 279092 event pairs, 4014 based on Foata normal form. 528/31655 useless extension candidates. Maximal degree in co-relation 222203. Up to 13376 conditions per place. [2023-08-30 12:08:22,931 INFO L137 encePairwiseOnDemand]: 356/369 looper letters, 221 selfloop transitions, 191 changer transitions 47/459 dead transitions. [2023-08-30 12:08:22,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 459 transitions, 8401 flow [2023-08-30 12:08:22,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 12:08:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 12:08:22,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3388 transitions. [2023-08-30 12:08:22,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531373775276214 [2023-08-30 12:08:22,936 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3388 transitions. [2023-08-30 12:08:22,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3388 transitions. [2023-08-30 12:08:22,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:08:22,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3388 transitions. [2023-08-30 12:08:22,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 130.30769230769232) internal successors, (3388), 26 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:22,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 369.0) internal successors, (9963), 27 states have internal predecessors, (9963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:22,946 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 369.0) internal successors, (9963), 27 states have internal predecessors, (9963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:22,946 INFO L175 Difference]: Start difference. First operand has 249 places, 325 transitions, 5830 flow. Second operand 26 states and 3388 transitions. [2023-08-30 12:08:22,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 459 transitions, 8401 flow [2023-08-30 12:08:26,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 459 transitions, 8251 flow, removed 32 selfloop flow, removed 11 redundant places. [2023-08-30 12:08:26,738 INFO L231 Difference]: Finished difference. Result has 266 places, 346 transitions, 6800 flow [2023-08-30 12:08:26,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6800, PETRI_PLACES=266, PETRI_TRANSITIONS=346} [2023-08-30 12:08:26,739 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 230 predicate places. [2023-08-30 12:08:26,739 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 346 transitions, 6800 flow [2023-08-30 12:08:26,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 126.5) internal successors, (3542), 28 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:26,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:08:26,740 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:08:26,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 12:08:26,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:08:26,940 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:08:26,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:08:26,941 INFO L85 PathProgramCache]: Analyzing trace with hash -426595078, now seen corresponding path program 5 times [2023-08-30 12:08:26,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:08:26,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392243826] [2023-08-30 12:08:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:08:26,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:08:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:08:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 12:08:27,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:08:27,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392243826] [2023-08-30 12:08:27,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392243826] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:08:27,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046086973] [2023-08-30 12:08:27,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 12:08:27,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:08:27,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:08:27,153 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:08:27,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 12:08:27,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 12:08:27,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:08:27,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 12:08:27,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:08:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 12:08:27,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:08:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 12:08:27,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046086973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:08:27,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:08:27,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 5] total 9 [2023-08-30 12:08:27,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664780502] [2023-08-30 12:08:27,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:08:27,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 12:08:27,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:08:27,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 12:08:27,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-08-30 12:08:27,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 369 [2023-08-30 12:08:27,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 346 transitions, 6800 flow. Second operand has 11 states, 11 states have (on average 163.27272727272728) internal successors, (1796), 11 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:27,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:08:27,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 369 [2023-08-30 12:08:27,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:08:34,816 INFO L130 PetriNetUnfolder]: 20010/35542 cut-off events. [2023-08-30 12:08:34,816 INFO L131 PetriNetUnfolder]: For 853076/853076 co-relation queries the response was YES. [2023-08-30 12:08:35,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273632 conditions, 35542 events. 20010/35542 cut-off events. For 853076/853076 co-relation queries the response was YES. Maximal size of possible extension queue 1312. Compared 305326 event pairs, 4025 based on Foata normal form. 1014/35706 useless extension candidates. Maximal degree in co-relation 273552. Up to 13406 conditions per place. [2023-08-30 12:08:35,453 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 241 selfloop transitions, 121 changer transitions 49/411 dead transitions. [2023-08-30 12:08:35,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 411 transitions, 8748 flow [2023-08-30 12:08:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 12:08:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 12:08:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 860 transitions. [2023-08-30 12:08:35,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2023-08-30 12:08:35,458 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 860 transitions. [2023-08-30 12:08:35,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 860 transitions. [2023-08-30 12:08:35,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:08:35,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 860 transitions. [2023-08-30 12:08:35,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:35,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 369.0) internal successors, (2214), 6 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:35,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 369.0) internal successors, (2214), 6 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:35,461 INFO L175 Difference]: Start difference. First operand has 266 places, 346 transitions, 6800 flow. Second operand 5 states and 860 transitions. [2023-08-30 12:08:35,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 411 transitions, 8748 flow [2023-08-30 12:08:43,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 411 transitions, 8267 flow, removed 186 selfloop flow, removed 17 redundant places. [2023-08-30 12:08:43,370 INFO L231 Difference]: Finished difference. Result has 246 places, 318 transitions, 6245 flow [2023-08-30 12:08:43,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=6301, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6245, PETRI_PLACES=246, PETRI_TRANSITIONS=318} [2023-08-30 12:08:43,370 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 210 predicate places. [2023-08-30 12:08:43,370 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 318 transitions, 6245 flow [2023-08-30 12:08:43,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 163.27272727272728) internal successors, (1796), 11 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:43,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:08:43,371 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:08:43,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 12:08:43,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 12:08:43,571 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:08:43,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:08:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash 595582606, now seen corresponding path program 3 times [2023-08-30 12:08:43,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:08:43,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435994655] [2023-08-30 12:08:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:08:43,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:08:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:08:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:08:44,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:08:44,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435994655] [2023-08-30 12:08:44,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435994655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:08:44,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977625065] [2023-08-30 12:08:44,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 12:08:44,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:08:44,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:08:44,192 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:08:44,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 12:08:44,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 12:08:44,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:08:44,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 12:08:44,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:08:44,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 12:08:44,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 12:08:44,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:08:44,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:08:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 12:08:45,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:08:47,283 INFO L321 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-08-30 12:08:47,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 81 [2023-08-30 12:08:47,486 INFO L321 Elim1Store]: treesize reduction 5, result has 89.8 percent of original size [2023-08-30 12:08:47,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 453 treesize of output 440 [2023-08-30 12:08:47,515 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:08:47,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:08:47,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 80 [2023-08-30 12:08:47,644 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-30 12:08:47,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 77 [2023-08-30 12:08:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 12:08:49,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977625065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:08:49,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:08:49,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 12:08:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145997359] [2023-08-30 12:08:49,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:08:49,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 12:08:49,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:08:49,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 12:08:49,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=667, Unknown=5, NotChecked=0, Total=812 [2023-08-30 12:08:51,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:08:54,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:08:56,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:08:58,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:08:59,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 369 [2023-08-30 12:08:59,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 318 transitions, 6245 flow. Second operand has 29 states, 29 states have (on average 112.79310344827586) internal successors, (3271), 29 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:59,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:08:59,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 369 [2023-08-30 12:08:59,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:09:09,086 INFO L130 PetriNetUnfolder]: 19018/33343 cut-off events. [2023-08-30 12:09:09,086 INFO L131 PetriNetUnfolder]: For 701219/701219 co-relation queries the response was YES. [2023-08-30 12:09:09,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255546 conditions, 33343 events. 19018/33343 cut-off events. For 701219/701219 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 282032 event pairs, 4830 based on Foata normal form. 34/32561 useless extension candidates. Maximal degree in co-relation 255479. Up to 23212 conditions per place. [2023-08-30 12:09:09,799 INFO L137 encePairwiseOnDemand]: 362/369 looper letters, 237 selfloop transitions, 89 changer transitions 85/411 dead transitions. [2023-08-30 12:09:09,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 411 transitions, 7994 flow [2023-08-30 12:09:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 12:09:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 12:09:09,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2005 transitions. [2023-08-30 12:09:09,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31962378447313883 [2023-08-30 12:09:09,802 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2005 transitions. [2023-08-30 12:09:09,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2005 transitions. [2023-08-30 12:09:09,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:09:09,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2005 transitions. [2023-08-30 12:09:09,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 117.94117647058823) internal successors, (2005), 17 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:09,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 369.0) internal successors, (6642), 18 states have internal predecessors, (6642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:09,808 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 369.0) internal successors, (6642), 18 states have internal predecessors, (6642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:09,809 INFO L175 Difference]: Start difference. First operand has 246 places, 318 transitions, 6245 flow. Second operand 17 states and 2005 transitions. [2023-08-30 12:09:09,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 411 transitions, 7994 flow [2023-08-30 12:09:13,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 411 transitions, 7382 flow, removed 177 selfloop flow, removed 17 redundant places. [2023-08-30 12:09:13,509 INFO L231 Difference]: Finished difference. Result has 215 places, 284 transitions, 5265 flow [2023-08-30 12:09:13,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5627, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5265, PETRI_PLACES=215, PETRI_TRANSITIONS=284} [2023-08-30 12:09:13,510 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 179 predicate places. [2023-08-30 12:09:13,510 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 284 transitions, 5265 flow [2023-08-30 12:09:13,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 112.79310344827586) internal successors, (3271), 29 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:13,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:09:13,511 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:09:13,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 12:09:13,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 12:09:13,721 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:09:13,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:09:13,721 INFO L85 PathProgramCache]: Analyzing trace with hash -744016098, now seen corresponding path program 4 times [2023-08-30 12:09:13,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:09:13,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234727446] [2023-08-30 12:09:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:09:13,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:09:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:09:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 12:09:13,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:09:13,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234727446] [2023-08-30 12:09:13,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234727446] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:09:13,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556591229] [2023-08-30 12:09:13,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 12:09:13,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:09:13,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:09:13,921 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:09:13,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 12:09:14,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 12:09:14,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:09:14,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 12:09:14,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:09:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 12:09:14,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:09:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 12:09:14,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556591229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:09:14,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:09:14,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 5] total 9 [2023-08-30 12:09:14,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219901837] [2023-08-30 12:09:14,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:09:14,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 12:09:14,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:09:14,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 12:09:14,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2023-08-30 12:09:14,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 369 [2023-08-30 12:09:14,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 284 transitions, 5265 flow. Second operand has 11 states, 11 states have (on average 165.8181818181818) internal successors, (1824), 11 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:14,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:09:14,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 369 [2023-08-30 12:09:14,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:09:17,621 INFO L130 PetriNetUnfolder]: 9551/17826 cut-off events. [2023-08-30 12:09:17,621 INFO L131 PetriNetUnfolder]: For 375707/375707 co-relation queries the response was YES. [2023-08-30 12:09:17,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126720 conditions, 17826 events. 9551/17826 cut-off events. For 375707/375707 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 149492 event pairs, 2984 based on Foata normal form. 1242/18700 useless extension candidates. Maximal degree in co-relation 126662. Up to 11503 conditions per place. [2023-08-30 12:09:17,845 INFO L137 encePairwiseOnDemand]: 364/369 looper letters, 175 selfloop transitions, 123 changer transitions 1/299 dead transitions. [2023-08-30 12:09:17,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 299 transitions, 6043 flow [2023-08-30 12:09:17,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 12:09:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 12:09:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 850 transitions. [2023-08-30 12:09:17,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2023-08-30 12:09:17,847 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 850 transitions. [2023-08-30 12:09:17,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 850 transitions. [2023-08-30 12:09:17,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:09:17,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 850 transitions. [2023-08-30 12:09:17,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:17,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 369.0) internal successors, (2214), 6 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:17,848 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 369.0) internal successors, (2214), 6 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:17,849 INFO L175 Difference]: Start difference. First operand has 215 places, 284 transitions, 5265 flow. Second operand 5 states and 850 transitions. [2023-08-30 12:09:17,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 299 transitions, 6043 flow [2023-08-30 12:09:19,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 299 transitions, 5645 flow, removed 90 selfloop flow, removed 19 redundant places. [2023-08-30 12:09:19,138 INFO L231 Difference]: Finished difference. Result has 188 places, 280 transitions, 5078 flow [2023-08-30 12:09:19,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=4672, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5078, PETRI_PLACES=188, PETRI_TRANSITIONS=280} [2023-08-30 12:09:19,138 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 152 predicate places. [2023-08-30 12:09:19,138 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 280 transitions, 5078 flow [2023-08-30 12:09:19,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 165.8181818181818) internal successors, (1824), 11 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:19,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:09:19,139 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:09:19,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 12:09:19,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 12:09:19,339 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:09:19,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:09:19,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1010249698, now seen corresponding path program 3 times [2023-08-30 12:09:19,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:09:19,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397908946] [2023-08-30 12:09:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:09:19,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:09:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:09:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:09:24,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:09:24,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397908946] [2023-08-30 12:09:24,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397908946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:09:24,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577451576] [2023-08-30 12:09:24,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 12:09:24,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:09:24,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:09:24,499 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:09:24,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 12:09:25,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 12:09:25,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:09:25,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 12:09:25,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:09:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-30 12:09:26,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:09:27,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:09:27,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 109 [2023-08-30 12:09:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-30 12:09:27,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577451576] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:09:27,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:09:27,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 30 [2023-08-30 12:09:27,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493847079] [2023-08-30 12:09:27,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:09:27,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 12:09:27,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:09:27,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 12:09:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2023-08-30 12:09:48,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 369 [2023-08-30 12:09:48,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 280 transitions, 5078 flow. Second operand has 32 states, 32 states have (on average 128.59375) internal successors, (4115), 32 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:09:48,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:09:48,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 369 [2023-08-30 12:09:48,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:09:59,968 INFO L130 PetriNetUnfolder]: 9942/18637 cut-off events. [2023-08-30 12:09:59,968 INFO L131 PetriNetUnfolder]: For 310481/310481 co-relation queries the response was YES. [2023-08-30 12:10:00,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130465 conditions, 18637 events. 9942/18637 cut-off events. For 310481/310481 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 157880 event pairs, 2159 based on Foata normal form. 72/18341 useless extension candidates. Maximal degree in co-relation 130414. Up to 16809 conditions per place. [2023-08-30 12:10:00,343 INFO L137 encePairwiseOnDemand]: 358/369 looper letters, 254 selfloop transitions, 63 changer transitions 40/357 dead transitions. [2023-08-30 12:10:00,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 357 transitions, 6558 flow [2023-08-30 12:10:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 12:10:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 12:10:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3150 transitions. [2023-08-30 12:10:00,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3556910569105691 [2023-08-30 12:10:00,346 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3150 transitions. [2023-08-30 12:10:00,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3150 transitions. [2023-08-30 12:10:00,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:10:00,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3150 transitions. [2023-08-30 12:10:00,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 131.25) internal successors, (3150), 24 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:00,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 369.0) internal successors, (9225), 25 states have internal predecessors, (9225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:00,353 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 369.0) internal successors, (9225), 25 states have internal predecessors, (9225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:00,354 INFO L175 Difference]: Start difference. First operand has 188 places, 280 transitions, 5078 flow. Second operand 24 states and 3150 transitions. [2023-08-30 12:10:00,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 357 transitions, 6558 flow [2023-08-30 12:10:01,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 357 transitions, 6311 flow, removed 84 selfloop flow, removed 2 redundant places. [2023-08-30 12:10:01,222 INFO L231 Difference]: Finished difference. Result has 218 places, 302 transitions, 5509 flow [2023-08-30 12:10:01,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=4835, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5509, PETRI_PLACES=218, PETRI_TRANSITIONS=302} [2023-08-30 12:10:01,223 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 182 predicate places. [2023-08-30 12:10:01,223 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 302 transitions, 5509 flow [2023-08-30 12:10:01,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 128.59375) internal successors, (4115), 32 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:01,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:10:01,224 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:10:01,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-30 12:10:01,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 12:10:01,424 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:10:01,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:10:01,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1518578682, now seen corresponding path program 4 times [2023-08-30 12:10:01,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:10:01,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810262174] [2023-08-30 12:10:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:10:01,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:10:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:10:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:10:03,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:10:03,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810262174] [2023-08-30 12:10:03,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810262174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:10:03,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888904913] [2023-08-30 12:10:03,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 12:10:03,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:10:03,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:10:03,462 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:10:03,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 12:10:03,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 12:10:03,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:10:03,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 12:10:03,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:10:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 12:10:04,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:10:04,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:10:04,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-08-30 12:10:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-30 12:10:04,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888904913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:10:04,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:10:04,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 4] total 20 [2023-08-30 12:10:04,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490449484] [2023-08-30 12:10:04,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:10:04,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 12:10:04,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:10:04,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 12:10:04,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-08-30 12:10:10,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 369 [2023-08-30 12:10:10,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 302 transitions, 5509 flow. Second operand has 22 states, 22 states have (on average 144.86363636363637) internal successors, (3187), 22 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:10,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:10:10,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 369 [2023-08-30 12:10:10,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:10:16,199 INFO L130 PetriNetUnfolder]: 9743/18398 cut-off events. [2023-08-30 12:10:16,200 INFO L131 PetriNetUnfolder]: For 288684/288684 co-relation queries the response was YES. [2023-08-30 12:10:16,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126263 conditions, 18398 events. 9743/18398 cut-off events. For 288684/288684 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 156854 event pairs, 1970 based on Foata normal form. 176/18206 useless extension candidates. Maximal degree in co-relation 126204. Up to 8261 conditions per place. [2023-08-30 12:10:16,427 INFO L137 encePairwiseOnDemand]: 362/369 looper letters, 202 selfloop transitions, 142 changer transitions 39/383 dead transitions. [2023-08-30 12:10:16,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 383 transitions, 7199 flow [2023-08-30 12:10:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 12:10:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 12:10:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2532 transitions. [2023-08-30 12:10:16,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036346245815399 [2023-08-30 12:10:16,430 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2532 transitions. [2023-08-30 12:10:16,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2532 transitions. [2023-08-30 12:10:16,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:10:16,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2532 transitions. [2023-08-30 12:10:16,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 148.94117647058823) internal successors, (2532), 17 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:16,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 369.0) internal successors, (6642), 18 states have internal predecessors, (6642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:16,435 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 369.0) internal successors, (6642), 18 states have internal predecessors, (6642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:16,435 INFO L175 Difference]: Start difference. First operand has 218 places, 302 transitions, 5509 flow. Second operand 17 states and 2532 transitions. [2023-08-30 12:10:16,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 383 transitions, 7199 flow [2023-08-30 12:10:17,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 383 transitions, 7042 flow, removed 18 selfloop flow, removed 20 redundant places. [2023-08-30 12:10:17,313 INFO L231 Difference]: Finished difference. Result has 209 places, 302 transitions, 5743 flow [2023-08-30 12:10:17,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5743, PETRI_PLACES=209, PETRI_TRANSITIONS=302} [2023-08-30 12:10:17,314 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 173 predicate places. [2023-08-30 12:10:17,314 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 302 transitions, 5743 flow [2023-08-30 12:10:17,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 144.86363636363637) internal successors, (3187), 22 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:17,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:10:17,315 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:10:17,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 12:10:17,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 12:10:17,516 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:10:17,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:10:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1857571849, now seen corresponding path program 5 times [2023-08-30 12:10:17,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:10:17,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282459236] [2023-08-30 12:10:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:10:17,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:10:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:10:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:10:18,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:10:18,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282459236] [2023-08-30 12:10:18,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282459236] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:10:18,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063423750] [2023-08-30 12:10:18,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 12:10:18,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:10:18,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:10:18,790 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:10:18,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 12:10:18,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 12:10:18,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:10:18,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 12:10:18,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:10:19,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:10:19,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:10:19,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:10:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 12:10:20,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:10:21,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:10:21,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-08-30 12:10:21,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:10:21,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 132 [2023-08-30 12:10:21,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:10:21,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 106 [2023-08-30 12:10:21,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:10:21,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2023-08-30 12:10:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 12:10:22,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063423750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:10:22,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:10:22,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 34 [2023-08-30 12:10:22,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636025527] [2023-08-30 12:10:22,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:10:22,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 12:10:22,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:10:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 12:10:22,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1050, Unknown=6, NotChecked=0, Total=1260 [2023-08-30 12:10:27,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 369 [2023-08-30 12:10:27,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 302 transitions, 5743 flow. Second operand has 36 states, 36 states have (on average 112.75) internal successors, (4059), 36 states have internal predecessors, (4059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:27,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:10:27,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 369 [2023-08-30 12:10:27,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:10:37,205 INFO L130 PetriNetUnfolder]: 11737/22360 cut-off events. [2023-08-30 12:10:37,205 INFO L131 PetriNetUnfolder]: For 363201/363201 co-relation queries the response was YES. [2023-08-30 12:10:37,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155542 conditions, 22360 events. 11737/22360 cut-off events. For 363201/363201 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 199596 event pairs, 2810 based on Foata normal form. 106/22144 useless extension candidates. Maximal degree in co-relation 155490. Up to 14105 conditions per place. [2023-08-30 12:10:37,438 INFO L137 encePairwiseOnDemand]: 360/369 looper letters, 452 selfloop transitions, 146 changer transitions 97/695 dead transitions. [2023-08-30 12:10:37,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 695 transitions, 13707 flow [2023-08-30 12:10:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 12:10:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 12:10:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3055 transitions. [2023-08-30 12:10:37,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31842818428184283 [2023-08-30 12:10:37,440 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3055 transitions. [2023-08-30 12:10:37,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3055 transitions. [2023-08-30 12:10:37,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:10:37,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3055 transitions. [2023-08-30 12:10:37,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 117.5) internal successors, (3055), 26 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:37,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 369.0) internal successors, (9963), 27 states have internal predecessors, (9963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:37,447 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 369.0) internal successors, (9963), 27 states have internal predecessors, (9963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:37,447 INFO L175 Difference]: Start difference. First operand has 209 places, 302 transitions, 5743 flow. Second operand 26 states and 3055 transitions. [2023-08-30 12:10:37,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 695 transitions, 13707 flow [2023-08-30 12:10:38,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 695 transitions, 13098 flow, removed 20 selfloop flow, removed 19 redundant places. [2023-08-30 12:10:38,684 INFO L231 Difference]: Finished difference. Result has 209 places, 388 transitions, 7793 flow [2023-08-30 12:10:38,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=5446, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7793, PETRI_PLACES=209, PETRI_TRANSITIONS=388} [2023-08-30 12:10:38,684 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 173 predicate places. [2023-08-30 12:10:38,685 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 388 transitions, 7793 flow [2023-08-30 12:10:38,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 112.75) internal successors, (4059), 36 states have internal predecessors, (4059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:38,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:10:38,685 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:10:38,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 12:10:38,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:10:38,886 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:10:38,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:10:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash -61821017, now seen corresponding path program 6 times [2023-08-30 12:10:38,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:10:38,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147972448] [2023-08-30 12:10:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:10:38,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:10:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:10:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:10:44,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:10:44,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147972448] [2023-08-30 12:10:44,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147972448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:10:44,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787215872] [2023-08-30 12:10:44,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 12:10:44,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:10:44,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:10:44,555 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:10:44,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 12:10:44,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 12:10:44,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:10:44,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 12:10:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:10:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-30 12:10:45,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:10:45,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:10:45,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-08-30 12:10:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-30 12:10:46,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787215872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:10:46,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:10:46,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 5, 5] total 26 [2023-08-30 12:10:46,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418501913] [2023-08-30 12:10:46,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:10:46,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 12:10:46,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:10:46,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 12:10:46,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2023-08-30 12:11:03,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 369 [2023-08-30 12:11:03,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 388 transitions, 7793 flow. Second operand has 28 states, 28 states have (on average 130.46428571428572) internal successors, (3653), 28 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:03,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:11:03,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 369 [2023-08-30 12:11:03,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:11:14,057 INFO L130 PetriNetUnfolder]: 10672/20691 cut-off events. [2023-08-30 12:11:14,057 INFO L131 PetriNetUnfolder]: For 386446/386446 co-relation queries the response was YES. [2023-08-30 12:11:14,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146138 conditions, 20691 events. 10672/20691 cut-off events. For 386446/386446 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 186902 event pairs, 3250 based on Foata normal form. 508/21199 useless extension candidates. Maximal degree in co-relation 146082. Up to 12728 conditions per place. [2023-08-30 12:11:14,278 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 218 selfloop transitions, 231 changer transitions 36/485 dead transitions. [2023-08-30 12:11:14,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 485 transitions, 9801 flow [2023-08-30 12:11:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 12:11:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 12:11:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3478 transitions. [2023-08-30 12:11:14,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36251824056702103 [2023-08-30 12:11:14,281 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3478 transitions. [2023-08-30 12:11:14,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3478 transitions. [2023-08-30 12:11:14,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:11:14,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3478 transitions. [2023-08-30 12:11:14,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 133.76923076923077) internal successors, (3478), 26 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:14,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 369.0) internal successors, (9963), 27 states have internal predecessors, (9963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:14,288 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 369.0) internal successors, (9963), 27 states have internal predecessors, (9963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:14,288 INFO L175 Difference]: Start difference. First operand has 209 places, 388 transitions, 7793 flow. Second operand 26 states and 3478 transitions. [2023-08-30 12:11:14,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 485 transitions, 9801 flow [2023-08-30 12:11:16,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 485 transitions, 9335 flow, removed 194 selfloop flow, removed 13 redundant places. [2023-08-30 12:11:16,156 INFO L231 Difference]: Finished difference. Result has 222 places, 403 transitions, 8135 flow [2023-08-30 12:11:16,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=7098, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8135, PETRI_PLACES=222, PETRI_TRANSITIONS=403} [2023-08-30 12:11:16,157 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 186 predicate places. [2023-08-30 12:11:16,157 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 403 transitions, 8135 flow [2023-08-30 12:11:16,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 130.46428571428572) internal successors, (3653), 28 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:16,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:11:16,158 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:11:16,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 12:11:16,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:11:16,368 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:11:16,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:11:16,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1625187175, now seen corresponding path program 5 times [2023-08-30 12:11:16,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:11:16,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88005880] [2023-08-30 12:11:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:11:16,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:11:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:11:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:11:17,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:11:17,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88005880] [2023-08-30 12:11:17,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88005880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:11:17,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570477812] [2023-08-30 12:11:17,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 12:11:17,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:11:17,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:11:17,294 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:11:17,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 12:11:17,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 12:11:17,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:11:17,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 12:11:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:11:17,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:11:17,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:11:17,509 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 12:11:17,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 12:11:17,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:11:18,010 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 12:11:18,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 12:11:18,127 INFO L350 Elim1Store]: Elim1 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 [2023-08-30 12:11:18,177 INFO L350 Elim1Store]: Elim1 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 [2023-08-30 12:11:18,233 INFO L350 Elim1Store]: Elim1 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 [2023-08-30 12:11:18,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:11:18,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:11:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:11:19,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:11:21,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:11:21,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2023-08-30 12:11:21,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:11:21,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 611 treesize of output 587 [2023-08-30 12:11:21,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:11:21,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 142 [2023-08-30 12:11:21,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:11:21,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 265 treesize of output 249 [2023-08-30 12:11:21,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:11:21,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 239 treesize of output 197 [2023-08-30 12:11:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 3 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:11:26,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570477812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:11:26,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:11:26,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 36 [2023-08-30 12:11:26,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357598390] [2023-08-30 12:11:26,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:11:26,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 12:11:26,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:11:26,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 12:11:26,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1129, Unknown=16, NotChecked=0, Total=1406 [2023-08-30 12:11:30,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 369 [2023-08-30 12:11:30,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 403 transitions, 8135 flow. Second operand has 38 states, 38 states have (on average 110.71052631578948) internal successors, (4207), 38 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:30,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:11:30,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 369 [2023-08-30 12:11:30,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:11:42,381 INFO L130 PetriNetUnfolder]: 14673/28560 cut-off events. [2023-08-30 12:11:42,381 INFO L131 PetriNetUnfolder]: For 500165/500165 co-relation queries the response was YES. [2023-08-30 12:11:42,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199277 conditions, 28560 events. 14673/28560 cut-off events. For 500165/500165 co-relation queries the response was YES. Maximal size of possible extension queue 1214. Compared 268284 event pairs, 4565 based on Foata normal form. 722/29282 useless extension candidates. Maximal degree in co-relation 199219. Up to 12725 conditions per place. [2023-08-30 12:11:42,636 INFO L137 encePairwiseOnDemand]: 361/369 looper letters, 636 selfloop transitions, 103 changer transitions 69/808 dead transitions. [2023-08-30 12:11:42,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 808 transitions, 17070 flow [2023-08-30 12:11:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 12:11:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 12:11:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2889 transitions. [2023-08-30 12:11:42,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3131707317073171 [2023-08-30 12:11:42,638 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2889 transitions. [2023-08-30 12:11:42,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2889 transitions. [2023-08-30 12:11:42,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:11:42,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2889 transitions. [2023-08-30 12:11:42,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 115.56) internal successors, (2889), 25 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:42,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 369.0) internal successors, (9594), 26 states have internal predecessors, (9594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:42,644 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 369.0) internal successors, (9594), 26 states have internal predecessors, (9594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:42,644 INFO L175 Difference]: Start difference. First operand has 222 places, 403 transitions, 8135 flow. Second operand 25 states and 2889 transitions. [2023-08-30 12:11:42,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 808 transitions, 17070 flow [2023-08-30 12:11:46,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 808 transitions, 15953 flow, removed 48 selfloop flow, removed 14 redundant places. [2023-08-30 12:11:46,240 INFO L231 Difference]: Finished difference. Result has 235 places, 440 transitions, 8444 flow [2023-08-30 12:11:46,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=7610, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8444, PETRI_PLACES=235, PETRI_TRANSITIONS=440} [2023-08-30 12:11:46,241 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 199 predicate places. [2023-08-30 12:11:46,241 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 440 transitions, 8444 flow [2023-08-30 12:11:46,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 110.71052631578948) internal successors, (4207), 38 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:46,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:11:46,242 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:11:46,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 12:11:46,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:11:46,449 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:11:46,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:11:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1447655052, now seen corresponding path program 6 times [2023-08-30 12:11:46,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:11:46,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399011251] [2023-08-30 12:11:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:11:46,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:11:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:11:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:11:47,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:11:47,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399011251] [2023-08-30 12:11:47,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399011251] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:11:47,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823059108] [2023-08-30 12:11:47,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 12:11:47,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:11:47,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:11:47,342 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:11:47,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 12:11:47,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 12:11:47,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:11:47,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 12:11:47,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:11:47,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:11:47,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:11:47,632 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 12:11:47,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 12:11:47,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 12:11:48,199 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 12:11:48,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 12:11:48,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:11:48,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:11:48,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:11:48,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:11:48,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:11:49,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:11:49,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:11:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:11:50,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:11:53,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:11:53,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-08-30 12:11:53,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:11:53,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1427 treesize of output 1357 [2023-08-30 12:11:53,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 69 [2023-08-30 12:11:53,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2023-08-30 12:11:53,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 54 [2023-08-30 12:11:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:11:54,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823059108] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:11:54,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:11:54,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 13] total 39 [2023-08-30 12:11:54,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963297966] [2023-08-30 12:11:54,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:11:54,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 12:11:54,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:11:54,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 12:11:54,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1404, Unknown=4, NotChecked=0, Total=1640 [2023-08-30 12:11:57,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 369 [2023-08-30 12:11:57,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 440 transitions, 8444 flow. Second operand has 41 states, 41 states have (on average 110.60975609756098) internal successors, (4535), 41 states have internal predecessors, (4535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:11:57,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:11:57,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 369 [2023-08-30 12:11:57,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:12:13,629 INFO L130 PetriNetUnfolder]: 15468/30443 cut-off events. [2023-08-30 12:12:13,629 INFO L131 PetriNetUnfolder]: For 501047/501047 co-relation queries the response was YES. [2023-08-30 12:12:13,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207097 conditions, 30443 events. 15468/30443 cut-off events. For 501047/501047 co-relation queries the response was YES. Maximal size of possible extension queue 1278. Compared 290596 event pairs, 3000 based on Foata normal form. 928/31371 useless extension candidates. Maximal degree in co-relation 207034. Up to 13292 conditions per place. [2023-08-30 12:12:14,028 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 602 selfloop transitions, 154 changer transitions 123/879 dead transitions. [2023-08-30 12:12:14,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 879 transitions, 17406 flow [2023-08-30 12:12:14,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 12:12:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 12:12:14,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4566 transitions. [2023-08-30 12:12:14,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30934959349593494 [2023-08-30 12:12:14,032 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4566 transitions. [2023-08-30 12:12:14,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4566 transitions. [2023-08-30 12:12:14,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:12:14,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4566 transitions. [2023-08-30 12:12:14,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 114.15) internal successors, (4566), 40 states have internal predecessors, (4566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:14,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 369.0) internal successors, (15129), 41 states have internal predecessors, (15129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:14,041 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 369.0) internal successors, (15129), 41 states have internal predecessors, (15129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:14,041 INFO L175 Difference]: Start difference. First operand has 235 places, 440 transitions, 8444 flow. Second operand 40 states and 4566 transitions. [2023-08-30 12:12:14,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 879 transitions, 17406 flow [2023-08-30 12:12:17,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 879 transitions, 17113 flow, removed 83 selfloop flow, removed 11 redundant places. [2023-08-30 12:12:17,364 INFO L231 Difference]: Finished difference. Result has 275 places, 486 transitions, 9729 flow [2023-08-30 12:12:17,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=7972, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=9729, PETRI_PLACES=275, PETRI_TRANSITIONS=486} [2023-08-30 12:12:17,364 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 239 predicate places. [2023-08-30 12:12:17,365 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 486 transitions, 9729 flow [2023-08-30 12:12:17,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 110.60975609756098) internal successors, (4535), 41 states have internal predecessors, (4535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:17,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:12:17,365 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:12:17,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 12:12:17,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 12:12:17,566 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:12:17,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:12:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash 118963316, now seen corresponding path program 5 times [2023-08-30 12:12:17,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:12:17,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798236784] [2023-08-30 12:12:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:12:17,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:12:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:12:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:12:21,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:12:21,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798236784] [2023-08-30 12:12:21,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798236784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:12:21,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213552746] [2023-08-30 12:12:21,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 12:12:21,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:12:21,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:12:21,886 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:12:21,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 12:12:22,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 12:12:22,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:12:22,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 12:12:22,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:12:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 12:12:22,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:12:23,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:12:23,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 12:12:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-30 12:12:23,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213552746] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:12:23,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:12:23,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8, 5] total 31 [2023-08-30 12:12:23,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395312373] [2023-08-30 12:12:23,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:12:23,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 12:12:23,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:12:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 12:12:23,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 12:12:42,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 369 [2023-08-30 12:12:42,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 486 transitions, 9729 flow. Second operand has 33 states, 33 states have (on average 128.5151515151515) internal successors, (4241), 33 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:42,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:12:42,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 369 [2023-08-30 12:12:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:12:56,816 INFO L130 PetriNetUnfolder]: 14599/29004 cut-off events. [2023-08-30 12:12:56,816 INFO L131 PetriNetUnfolder]: For 538603/538603 co-relation queries the response was YES. [2023-08-30 12:12:57,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201948 conditions, 29004 events. 14599/29004 cut-off events. For 538603/538603 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 277236 event pairs, 2397 based on Foata normal form. 682/29638 useless extension candidates. Maximal degree in co-relation 201872. Up to 10605 conditions per place. [2023-08-30 12:12:57,165 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 202 selfloop transitions, 391 changer transitions 36/629 dead transitions. [2023-08-30 12:12:57,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 629 transitions, 12573 flow [2023-08-30 12:12:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 12:12:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 12:12:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4462 transitions. [2023-08-30 12:12:57,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3556512035708592 [2023-08-30 12:12:57,168 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4462 transitions. [2023-08-30 12:12:57,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4462 transitions. [2023-08-30 12:12:57,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:12:57,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4462 transitions. [2023-08-30 12:12:57,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 131.23529411764707) internal successors, (4462), 34 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:57,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 369.0) internal successors, (12915), 35 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:57,310 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 369.0) internal successors, (12915), 35 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:57,310 INFO L175 Difference]: Start difference. First operand has 275 places, 486 transitions, 9729 flow. Second operand 34 states and 4462 transitions. [2023-08-30 12:12:57,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 629 transitions, 12573 flow [2023-08-30 12:13:00,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 629 transitions, 12032 flow, removed 177 selfloop flow, removed 21 redundant places. [2023-08-30 12:13:00,955 INFO L231 Difference]: Finished difference. Result has 288 places, 528 transitions, 11140 flow [2023-08-30 12:13:00,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=9202, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=11140, PETRI_PLACES=288, PETRI_TRANSITIONS=528} [2023-08-30 12:13:00,956 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 252 predicate places. [2023-08-30 12:13:00,956 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 528 transitions, 11140 flow [2023-08-30 12:13:00,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 128.5151515151515) internal successors, (4241), 33 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:13:00,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:13:00,957 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:13:00,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 12:13:01,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-30 12:13:01,164 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:13:01,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:13:01,164 INFO L85 PathProgramCache]: Analyzing trace with hash 607353480, now seen corresponding path program 6 times [2023-08-30 12:13:01,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:13:01,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347438557] [2023-08-30 12:13:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:13:01,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:13:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:13:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:13:03,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:13:03,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347438557] [2023-08-30 12:13:03,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347438557] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:13:03,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499495340] [2023-08-30 12:13:03,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 12:13:03,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:13:03,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:13:03,249 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:13:03,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 12:13:03,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 12:13:03,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:13:03,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 12:13:03,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:13:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 12:13:04,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:13:04,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:13:04,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-08-30 12:13:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 12:13:04,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499495340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:13:04,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:13:04,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 5] total 23 [2023-08-30 12:13:04,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058724655] [2023-08-30 12:13:04,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:13:04,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 12:13:04,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:13:04,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 12:13:04,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2023-08-30 12:13:12,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 369 [2023-08-30 12:13:12,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 528 transitions, 11140 flow. Second operand has 25 states, 25 states have (on average 135.8) internal successors, (3395), 25 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:13:12,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:13:12,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 369 [2023-08-30 12:13:12,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:13:20,807 INFO L130 PetriNetUnfolder]: 13446/26917 cut-off events. [2023-08-30 12:13:20,807 INFO L131 PetriNetUnfolder]: For 536604/536604 co-relation queries the response was YES. [2023-08-30 12:13:21,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195060 conditions, 26917 events. 13446/26917 cut-off events. For 536604/536604 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 255312 event pairs, 2238 based on Foata normal form. 512/27429 useless extension candidates. Maximal degree in co-relation 194980. Up to 16213 conditions per place. [2023-08-30 12:13:21,238 INFO L137 encePairwiseOnDemand]: 361/369 looper letters, 336 selfloop transitions, 196 changer transitions 50/582 dead transitions. [2023-08-30 12:13:21,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 582 transitions, 13147 flow [2023-08-30 12:13:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 12:13:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 12:13:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2762 transitions. [2023-08-30 12:13:21,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37425474254742547 [2023-08-30 12:13:21,242 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2762 transitions. [2023-08-30 12:13:21,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2762 transitions. [2023-08-30 12:13:21,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:13:21,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2762 transitions. [2023-08-30 12:13:21,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 138.1) internal successors, (2762), 20 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:13:21,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 369.0) internal successors, (7749), 21 states have internal predecessors, (7749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:13:21,249 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 369.0) internal successors, (7749), 21 states have internal predecessors, (7749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:13:21,249 INFO L175 Difference]: Start difference. First operand has 288 places, 528 transitions, 11140 flow. Second operand 20 states and 2762 transitions. [2023-08-30 12:13:21,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 582 transitions, 13147 flow [2023-08-30 12:13:25,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 582 transitions, 12584 flow, removed 110 selfloop flow, removed 26 redundant places. [2023-08-30 12:13:25,187 INFO L231 Difference]: Finished difference. Result has 279 places, 481 transitions, 10049 flow [2023-08-30 12:13:25,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=10323, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10049, PETRI_PLACES=279, PETRI_TRANSITIONS=481} [2023-08-30 12:13:25,188 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 243 predicate places. [2023-08-30 12:13:25,188 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 481 transitions, 10049 flow [2023-08-30 12:13:25,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 135.8) internal successors, (3395), 25 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:13:25,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:13:25,188 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:13:25,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-30 12:13:25,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 12:13:25,389 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:13:25,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:13:25,389 INFO L85 PathProgramCache]: Analyzing trace with hash -58592056, now seen corresponding path program 6 times [2023-08-30 12:13:25,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:13:25,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293372052] [2023-08-30 12:13:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:13:25,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:13:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:13:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:13:30,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:13:30,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293372052] [2023-08-30 12:13:30,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293372052] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:13:30,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725586707] [2023-08-30 12:13:30,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 12:13:30,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:13:30,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:13:30,797 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:13:30,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 12:13:31,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 12:13:31,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:13:31,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 12:13:31,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:13:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 12:13:32,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:13:32,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:13:32,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-30 12:13:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 12:13:32,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725586707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:13:32,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:13:32,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 6] total 33 [2023-08-30 12:13:32,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563437413] [2023-08-30 12:13:32,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:13:32,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 12:13:32,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:13:32,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 12:13:32,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 12:13:54,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 369 [2023-08-30 12:13:54,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 481 transitions, 10049 flow. Second operand has 35 states, 35 states have (on average 126.45714285714286) internal successors, (4426), 35 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:13:54,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:13:54,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 369 [2023-08-30 12:13:54,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:14:11,936 INFO L130 PetriNetUnfolder]: 12999/25956 cut-off events. [2023-08-30 12:14:11,937 INFO L131 PetriNetUnfolder]: For 543437/543437 co-relation queries the response was YES. [2023-08-30 12:14:12,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185944 conditions, 25956 events. 12999/25956 cut-off events. For 543437/543437 co-relation queries the response was YES. Maximal size of possible extension queue 1085. Compared 244649 event pairs, 4014 based on Foata normal form. 552/26508 useless extension candidates. Maximal degree in co-relation 185870. Up to 14461 conditions per place. [2023-08-30 12:14:12,296 INFO L137 encePairwiseOnDemand]: 357/369 looper letters, 248 selfloop transitions, 356 changer transitions 35/639 dead transitions. [2023-08-30 12:14:12,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 639 transitions, 13068 flow [2023-08-30 12:14:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 12:14:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 12:14:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 5550 transitions. [2023-08-30 12:14:12,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34978256759311777 [2023-08-30 12:14:12,299 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 5550 transitions. [2023-08-30 12:14:12,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 5550 transitions. [2023-08-30 12:14:12,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:14:12,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 5550 transitions. [2023-08-30 12:14:12,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 129.06976744186048) internal successors, (5550), 43 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:14:12,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 369.0) internal successors, (16236), 44 states have internal predecessors, (16236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:14:12,309 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 369.0) internal successors, (16236), 44 states have internal predecessors, (16236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:14:12,310 INFO L175 Difference]: Start difference. First operand has 279 places, 481 transitions, 10049 flow. Second operand 43 states and 5550 transitions. [2023-08-30 12:14:12,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 639 transitions, 13068 flow [2023-08-30 12:14:16,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 639 transitions, 12359 flow, removed 77 selfloop flow, removed 26 redundant places. [2023-08-30 12:14:16,456 INFO L231 Difference]: Finished difference. Result has 293 places, 535 transitions, 11687 flow [2023-08-30 12:14:16,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=9318, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=11687, PETRI_PLACES=293, PETRI_TRANSITIONS=535} [2023-08-30 12:14:16,457 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 257 predicate places. [2023-08-30 12:14:16,457 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 535 transitions, 11687 flow [2023-08-30 12:14:16,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 126.45714285714286) internal successors, (4426), 35 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:14:16,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:14:16,458 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:14:16,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 12:14:16,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 12:14:16,658 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:14:16,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:14:16,659 INFO L85 PathProgramCache]: Analyzing trace with hash 256901008, now seen corresponding path program 7 times [2023-08-30 12:14:16,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:14:16,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062813831] [2023-08-30 12:14:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:14:16,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:14:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:14:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:14:19,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:14:19,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062813831] [2023-08-30 12:14:19,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062813831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:14:19,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386525901] [2023-08-30 12:14:19,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 12:14:19,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:14:19,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:14:19,860 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:14:19,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 12:14:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:14:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 12:14:20,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:14:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-30 12:14:20,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:14:21,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:14:21,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-30 12:14:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 12:14:21,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386525901] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:14:21,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:14:21,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 6] total 31 [2023-08-30 12:14:21,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962167788] [2023-08-30 12:14:21,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:14:21,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 12:14:21,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:14:21,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 12:14:21,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 12:14:41,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 369 [2023-08-30 12:14:41,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 535 transitions, 11687 flow. Second operand has 33 states, 33 states have (on average 132.54545454545453) internal successors, (4374), 33 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:14:41,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:14:41,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 369 [2023-08-30 12:14:41,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:14:53,790 INFO L130 PetriNetUnfolder]: 12283/24348 cut-off events. [2023-08-30 12:14:53,790 INFO L131 PetriNetUnfolder]: For 570823/570823 co-relation queries the response was YES. [2023-08-30 12:14:53,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181880 conditions, 24348 events. 12283/24348 cut-off events. For 570823/570823 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 226914 event pairs, 4051 based on Foata normal form. 334/24682 useless extension candidates. Maximal degree in co-relation 181810. Up to 14598 conditions per place. [2023-08-30 12:14:54,001 INFO L137 encePairwiseOnDemand]: 359/369 looper letters, 155 selfloop transitions, 267 changer transitions 173/595 dead transitions. [2023-08-30 12:14:54,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 595 transitions, 13281 flow [2023-08-30 12:14:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 12:14:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 12:14:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4312 transitions. [2023-08-30 12:14:54,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36517615176151763 [2023-08-30 12:14:54,004 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4312 transitions. [2023-08-30 12:14:54,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4312 transitions. [2023-08-30 12:14:54,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:14:54,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4312 transitions. [2023-08-30 12:14:54,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 134.75) internal successors, (4312), 32 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:14:54,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 369.0) internal successors, (12177), 33 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:14:54,014 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 369.0) internal successors, (12177), 33 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:14:54,014 INFO L175 Difference]: Start difference. First operand has 293 places, 535 transitions, 11687 flow. Second operand 32 states and 4312 transitions. [2023-08-30 12:14:54,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 595 transitions, 13281 flow [2023-08-30 12:14:57,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 595 transitions, 12678 flow, removed 172 selfloop flow, removed 24 redundant places. [2023-08-30 12:14:57,899 INFO L231 Difference]: Finished difference. Result has 290 places, 407 transitions, 9346 flow [2023-08-30 12:14:57,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=10629, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9346, PETRI_PLACES=290, PETRI_TRANSITIONS=407} [2023-08-30 12:14:57,900 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 254 predicate places. [2023-08-30 12:14:57,900 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 407 transitions, 9346 flow [2023-08-30 12:14:57,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 132.54545454545453) internal successors, (4374), 33 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:14:57,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:14:57,901 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:14:57,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-08-30 12:14:58,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:14:58,108 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-08-30 12:14:58,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:14:58,108 INFO L85 PathProgramCache]: Analyzing trace with hash 607353481, now seen corresponding path program 7 times [2023-08-30 12:14:58,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:14:58,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776049583] [2023-08-30 12:14:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:14:58,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:14:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:15:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:15:00,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:15:00,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776049583] [2023-08-30 12:15:00,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776049583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:15:00,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039091313] [2023-08-30 12:15:00,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 12:15:00,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:15:00,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:15:00,205 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:15:00,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 12:15:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:15:00,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 12:15:00,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:15:00,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:15:01,058 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-30 12:15:01,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 29 treesize of output 32 [2023-08-30 12:15:01,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:15:01,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-08-30 12:15:01,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:15:01,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-08-30 12:15:09,142 WARN L222 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:15:15,422 WARN L222 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:15:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:15:20,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:15:25,227 INFO L321 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-08-30 12:15:25,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 85 [2023-08-30 12:15:25,434 INFO L321 Elim1Store]: treesize reduction 4, result has 96.0 percent of original size [2023-08-30 12:15:25,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1046 treesize of output 979 [2023-08-30 12:15:25,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:15:25,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 384 [2023-08-30 12:15:25,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:15:25,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 317 treesize of output 296 [2023-08-30 12:15:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 12:15:36,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039091313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:15:36,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:15:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 48 [2023-08-30 12:15:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672904892] [2023-08-30 12:15:36,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:15:36,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-30 12:15:36,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:15:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-30 12:15:36,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2221, Unknown=3, NotChecked=0, Total=2450 [2023-08-30 12:15:39,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 369 [2023-08-30 12:15:39,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 407 transitions, 9346 flow. Second operand has 50 states, 50 states have (on average 100.32) internal successors, (5016), 50 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:15:39,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:15:39,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 369 [2023-08-30 12:15:39,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:16:00,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:16:02,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:16:06,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:16:08,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:16:11,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:16:16,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:16:18,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15