./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-more-queue-add-2-nl.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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 15:40:53,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:40:53,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:40:53,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:40:53,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:40:53,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:40:53,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:40:53,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:40:53,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:40:53,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:40:53,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:40:53,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:40:53,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:40:53,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:40:53,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:40:53,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:40:53,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:40:53,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:40:53,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:40:53,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:40:53,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:40:53,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:40:53,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:40:53,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:40:53,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:40:53,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:40:53,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:40:53,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:40:53,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:40:53,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:40:53,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:40:53,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:40:53,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:40:53,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:40:53,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:40:53,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:40:53,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:40:53,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:40:53,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:40:53,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:40:53,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:40:53,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:40:53,997 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:40:53,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:40:53,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:40:53,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:40:53,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:40:53,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:40:54,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:40:54,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:40:54,000 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:40:54,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:40:54,001 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:40:54,001 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:40:54,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:40:54,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:40:54,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:40:54,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:40:54,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:40:54,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:40:54,003 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:40:54,003 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:40:54,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:40:54,003 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:40:54,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:40:54,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:40:54,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:40:54,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:40:54,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:40:54,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:40:54,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:40:54,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:40:54,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:40:54,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:40:54,005 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:40:54,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:40:54,006 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:40:54,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:40:54,006 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:40:54,006 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:40:54,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:40:54,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:40:54,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:40:54,345 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:40:54,345 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:40:54,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-08-30 15:40:55,522 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:40:55,697 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:40:55,698 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-08-30 15:40:55,704 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae80bfc16/125ee0a3f9504d34a97f8fe6a0a9e32e/FLAG13d12ffdc [2023-08-30 15:40:56,098 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae80bfc16/125ee0a3f9504d34a97f8fe6a0a9e32e [2023-08-30 15:40:56,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:40:56,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:40:56,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:40:56,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:40:56,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:40:56,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db9c4c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56, skipping insertion in model container [2023-08-30 15:40:56,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:40:56,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:40:56,338 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-more-queue-add-2-nl.wvr.c[2870,2883] [2023-08-30 15:40:56,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:40:56,359 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:40:56,387 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-more-queue-add-2-nl.wvr.c[2870,2883] [2023-08-30 15:40:56,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:40:56,406 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:40:56,409 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:40:56,415 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:40:56,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56 WrapperNode [2023-08-30 15:40:56,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:40:56,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:40:56,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:40:56,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:40:56,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,474 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 180 [2023-08-30 15:40:56,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:40:56,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:40:56,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:40:56,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:40:56,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,522 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:40:56,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:40:56,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:40:56,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:40:56,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56" (1/1) ... [2023-08-30 15:40:56,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:40:56,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:40:56,564 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 15:40:56,586 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 15:40:56,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:40:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:40:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:40:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:40:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:40:56,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:40:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:40:56,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:40:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:40:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:40:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:40:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 15:40:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:40:56,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:40:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:40:56,604 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 15:40:56,720 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:40:56,722 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:40:57,090 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:40:57,272 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:40:57,280 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 15:40:57,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:40:57 BoogieIcfgContainer [2023-08-30 15:40:57,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:40:57,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:40:57,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:40:57,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:40:57,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:40:56" (1/3) ... [2023-08-30 15:40:57,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17117566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:40:57, skipping insertion in model container [2023-08-30 15:40:57,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:56" (2/3) ... [2023-08-30 15:40:57,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17117566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:40:57, skipping insertion in model container [2023-08-30 15:40:57,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:40:57" (3/3) ... [2023-08-30 15:40:57,299 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-08-30 15:40:57,306 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:40:57,315 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:40:57,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-08-30 15:40:57,316 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:40:57,437 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 15:40:57,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 154 transitions, 324 flow [2023-08-30 15:40:57,540 INFO L130 PetriNetUnfolder]: 11/152 cut-off events. [2023-08-30 15:40:57,540 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 15:40:57,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 152 events. 11/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 113. Up to 3 conditions per place. [2023-08-30 15:40:57,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 154 transitions, 324 flow [2023-08-30 15:40:57,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 136 transitions, 281 flow [2023-08-30 15:40:57,554 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:40:57,561 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 136 transitions, 281 flow [2023-08-30 15:40:57,564 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 136 transitions, 281 flow [2023-08-30 15:40:57,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 136 transitions, 281 flow [2023-08-30 15:40:57,591 INFO L130 PetriNetUnfolder]: 10/136 cut-off events. [2023-08-30 15:40:57,592 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 15:40:57,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 136 events. 10/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 148 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 113. Up to 3 conditions per place. [2023-08-30 15:40:57,594 INFO L119 LiptonReduction]: Number of co-enabled transitions 1350 [2023-08-30 15:41:03,080 INFO L134 LiptonReduction]: Checked pairs total: 1701 [2023-08-30 15:41:03,080 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-30 15:41:03,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:41:03,097 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;@6ee44a41, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:41:03,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-08-30 15:41:03,099 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 15:41:03,099 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:41:03,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:03,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 15:41:03,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:03,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:03,104 INFO L85 PathProgramCache]: Analyzing trace with hash 22502, now seen corresponding path program 1 times [2023-08-30 15:41:03,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:03,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125035097] [2023-08-30 15:41:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:03,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:03,389 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 15:41:03,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:03,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125035097] [2023-08-30 15:41:03,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125035097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:03,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:41:03,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:41:03,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249027130] [2023-08-30 15:41:03,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:03,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:41:03,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:03,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:41:03,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:41:03,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 300 [2023-08-30 15:41:03,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:03,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:03,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 300 [2023-08-30 15:41:03,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:03,675 INFO L130 PetriNetUnfolder]: 435/661 cut-off events. [2023-08-30 15:41:03,676 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 15:41:03,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 661 events. 435/661 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3031 event pairs, 244 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 617. Up to 332 conditions per place. [2023-08-30 15:41:03,686 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 41 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-30 15:41:03,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 192 flow [2023-08-30 15:41:03,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:41:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:41:03,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-08-30 15:41:03,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2023-08-30 15:41:03,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-08-30 15:41:03,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-08-30 15:41:03,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:03,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-08-30 15:41:03,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:03,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:03,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:03,735 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 63 flow. Second operand 3 states and 438 transitions. [2023-08-30 15:41:03,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 192 flow [2023-08-30 15:41:03,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 44 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:41:03,743 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 66 flow [2023-08-30 15:41:03,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-08-30 15:41:03,750 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-08-30 15:41:03,751 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 66 flow [2023-08-30 15:41:03,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:03,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:03,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:41:03,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:41:03,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:03,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:03,757 INFO L85 PathProgramCache]: Analyzing trace with hash 698752, now seen corresponding path program 1 times [2023-08-30 15:41:03,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:03,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344055373] [2023-08-30 15:41:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:03,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:03,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:03,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344055373] [2023-08-30 15:41:03,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344055373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:03,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790315099] [2023-08-30 15:41:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:03,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:03,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:03,862 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 15:41:03,870 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 15:41:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:04,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:41:04,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:04,073 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 15:41:04,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:41:04,096 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 15:41:04,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790315099] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:41:04,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:41:04,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 15:41:04,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016154074] [2023-08-30 15:41:04,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:41:04,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:41:04,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:04,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:41:04,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:41:04,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 300 [2023-08-30 15:41:04,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 130.14285714285714) internal successors, (911), 7 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:04,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:04,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 300 [2023-08-30 15:41:04,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:04,513 INFO L130 PetriNetUnfolder]: 1089/1651 cut-off events. [2023-08-30 15:41:04,514 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 15:41:04,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3388 conditions, 1651 events. 1089/1651 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8659 event pairs, 610 based on Foata normal form. 0/651 useless extension candidates. Maximal degree in co-relation 2707. Up to 331 conditions per place. [2023-08-30 15:41:04,522 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 97 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2023-08-30 15:41:04,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 107 transitions, 470 flow [2023-08-30 15:41:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:41:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:41:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1012 transitions. [2023-08-30 15:41:04,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4819047619047619 [2023-08-30 15:41:04,526 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1012 transitions. [2023-08-30 15:41:04,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1012 transitions. [2023-08-30 15:41:04,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:04,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1012 transitions. [2023-08-30 15:41:04,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 144.57142857142858) internal successors, (1012), 7 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:04,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 300.0) internal successors, (2400), 8 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:04,533 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 300.0) internal successors, (2400), 8 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:04,534 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 66 flow. Second operand 7 states and 1012 transitions. [2023-08-30 15:41:04,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 107 transitions, 470 flow [2023-08-30 15:41:04,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 107 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:41:04,536 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 123 flow [2023-08-30 15:41:04,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=123, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-30 15:41:04,537 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-08-30 15:41:04,537 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 123 flow [2023-08-30 15:41:04,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.14285714285714) internal successors, (911), 7 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:04,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:04,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-30 15:41:04,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 15:41:04,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:04,744 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:04,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:04,745 INFO L85 PathProgramCache]: Analyzing trace with hash 21661990, now seen corresponding path program 1 times [2023-08-30 15:41:04,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:04,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413594733] [2023-08-30 15:41:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:04,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:04,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:04,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413594733] [2023-08-30 15:41:04,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413594733] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:04,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014975245] [2023-08-30 15:41:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:04,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:04,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:04,824 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 15:41:04,860 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 15:41:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:04,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 15:41:04,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:04,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:41:04,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014975245] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:04,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:41:04,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 15:41:04,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104258762] [2023-08-30 15:41:04,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:04,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:41:04,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:04,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:41:04,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:41:04,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 300 [2023-08-30 15:41:04,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:04,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:04,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 300 [2023-08-30 15:41:04,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:05,212 INFO L130 PetriNetUnfolder]: 1086/1647 cut-off events. [2023-08-30 15:41:05,212 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 15:41:05,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3390 conditions, 1647 events. 1086/1647 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 8802 event pairs, 610 based on Foata normal form. 2/654 useless extension candidates. Maximal degree in co-relation 2024. Up to 986 conditions per place. [2023-08-30 15:41:05,220 INFO L137 encePairwiseOnDemand]: 297/300 looper letters, 61 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-08-30 15:41:05,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 65 transitions, 308 flow [2023-08-30 15:41:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:41:05,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:41:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 709 transitions. [2023-08-30 15:41:05,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726666666666667 [2023-08-30 15:41:05,222 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 709 transitions. [2023-08-30 15:41:05,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 709 transitions. [2023-08-30 15:41:05,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:05,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 709 transitions. [2023-08-30 15:41:05,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:05,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:05,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:05,228 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 123 flow. Second operand 5 states and 709 transitions. [2023-08-30 15:41:05,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 65 transitions, 308 flow [2023-08-30 15:41:05,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 65 transitions, 300 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 15:41:05,230 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 94 flow [2023-08-30 15:41:05,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-30 15:41:05,231 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-08-30 15:41:05,231 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 94 flow [2023-08-30 15:41:05,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:05,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:05,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:41:05,243 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 15:41:05,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 15:41:05,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:05,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:05,438 INFO L85 PathProgramCache]: Analyzing trace with hash 671623000, now seen corresponding path program 1 times [2023-08-30 15:41:05,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:05,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302344782] [2023-08-30 15:41:05,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:05,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:05,506 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 15:41:05,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:05,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302344782] [2023-08-30 15:41:05,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302344782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:05,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:41:05,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:41:05,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339275574] [2023-08-30 15:41:05,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:05,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:41:05,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:05,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:41:05,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:41:05,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-08-30 15:41:05,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:05,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:05,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-08-30 15:41:05,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:05,786 INFO L130 PetriNetUnfolder]: 1226/2127 cut-off events. [2023-08-30 15:41:05,787 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 15:41:05,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4395 conditions, 2127 events. 1226/2127 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 12686 event pairs, 615 based on Foata normal form. 0/1047 useless extension candidates. Maximal degree in co-relation 3497. Up to 1328 conditions per place. [2023-08-30 15:41:05,797 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-30 15:41:05,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 211 flow [2023-08-30 15:41:05,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:41:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:41:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2023-08-30 15:41:05,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-08-30 15:41:05,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2023-08-30 15:41:05,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2023-08-30 15:41:05,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:05,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2023-08-30 15:41:05,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:05,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:05,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:05,802 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 94 flow. Second operand 3 states and 430 transitions. [2023-08-30 15:41:05,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 211 flow [2023-08-30 15:41:05,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 206 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:41:05,805 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 103 flow [2023-08-30 15:41:05,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-08-30 15:41:05,806 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-08-30 15:41:05,806 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 103 flow [2023-08-30 15:41:05,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:05,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:05,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:41:05,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 15:41:05,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:05,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash 671622890, now seen corresponding path program 1 times [2023-08-30 15:41:05,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:05,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648441808] [2023-08-30 15:41:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:05,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:05,913 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 15:41:05,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:05,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648441808] [2023-08-30 15:41:05,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648441808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:05,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:41:05,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:41:05,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024756752] [2023-08-30 15:41:05,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:05,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:41:05,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:05,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:41:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:41:05,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 300 [2023-08-30 15:41:05,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:05,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:05,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 300 [2023-08-30 15:41:05,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:06,145 INFO L130 PetriNetUnfolder]: 902/1580 cut-off events. [2023-08-30 15:41:06,145 INFO L131 PetriNetUnfolder]: For 149/206 co-relation queries the response was YES. [2023-08-30 15:41:06,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3552 conditions, 1580 events. 902/1580 cut-off events. For 149/206 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 9470 event pairs, 749 based on Foata normal form. 71/931 useless extension candidates. Maximal degree in co-relation 3505. Up to 1567 conditions per place. [2023-08-30 15:41:06,152 INFO L137 encePairwiseOnDemand]: 288/300 looper letters, 25 selfloop transitions, 2 changer transitions 6/34 dead transitions. [2023-08-30 15:41:06,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 184 flow [2023-08-30 15:41:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:41:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:41:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 542 transitions. [2023-08-30 15:41:06,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45166666666666666 [2023-08-30 15:41:06,154 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 542 transitions. [2023-08-30 15:41:06,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 542 transitions. [2023-08-30 15:41:06,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:06,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 542 transitions. [2023-08-30 15:41:06,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:06,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:06,162 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:06,162 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 103 flow. Second operand 4 states and 542 transitions. [2023-08-30 15:41:06,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 184 flow [2023-08-30 15:41:06,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:41:06,166 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 127 flow [2023-08-30 15:41:06,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-08-30 15:41:06,168 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2023-08-30 15:41:06,168 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 127 flow [2023-08-30 15:41:06,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:06,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:06,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:41:06,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 15:41:06,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:06,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash -657526496, now seen corresponding path program 1 times [2023-08-30 15:41:06,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:06,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773774568] [2023-08-30 15:41:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:06,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:06,271 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 15:41:06,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:06,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773774568] [2023-08-30 15:41:06,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773774568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:06,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116731582] [2023-08-30 15:41:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:06,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:06,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:06,273 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 15:41:06,299 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 15:41:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:06,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:41:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:06,357 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 15:41:06,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:41:06,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116731582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:06,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:41:06,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 15:41:06,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929027871] [2023-08-30 15:41:06,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:06,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:41:06,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:41:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:41:06,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-08-30 15:41:06,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:06,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:06,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-08-30 15:41:06,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:06,480 INFO L130 PetriNetUnfolder]: 493/875 cut-off events. [2023-08-30 15:41:06,480 INFO L131 PetriNetUnfolder]: For 243/287 co-relation queries the response was YES. [2023-08-30 15:41:06,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2428 conditions, 875 events. 493/875 cut-off events. For 243/287 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4512 event pairs, 380 based on Foata normal form. 44/631 useless extension candidates. Maximal degree in co-relation 2407. Up to 871 conditions per place. [2023-08-30 15:41:06,485 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 23 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-30 15:41:06,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 25 transitions, 163 flow [2023-08-30 15:41:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:41:06,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:41:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-08-30 15:41:06,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577777777777778 [2023-08-30 15:41:06,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-08-30 15:41:06,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-08-30 15:41:06,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:06,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-08-30 15:41:06,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:06,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:06,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:06,492 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 127 flow. Second operand 3 states and 412 transitions. [2023-08-30 15:41:06,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 25 transitions, 163 flow [2023-08-30 15:41:06,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 25 transitions, 157 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 15:41:06,494 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 111 flow [2023-08-30 15:41:06,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-08-30 15:41:06,497 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-08-30 15:41:06,497 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 111 flow [2023-08-30 15:41:06,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:06,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:06,498 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 15:41:06,509 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 15:41:06,703 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 15:41:06,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:06,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:06,704 INFO L85 PathProgramCache]: Analyzing trace with hash -657626506, now seen corresponding path program 2 times [2023-08-30 15:41:06,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:06,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090479084] [2023-08-30 15:41:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:06,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:06,775 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 15:41:06,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:06,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090479084] [2023-08-30 15:41:06,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090479084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:06,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860023854] [2023-08-30 15:41:06,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:41:06,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:06,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:06,778 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 15:41:06,805 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 15:41:06,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:41:06,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:06,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 15:41:06,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:06,873 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 15:41:06,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:41:06,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860023854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:06,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:41:06,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 15:41:06,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527863790] [2023-08-30 15:41:06,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:06,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:41:06,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:41:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:41:06,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-08-30 15:41:06,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:06,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:06,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-08-30 15:41:06,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:06,996 INFO L130 PetriNetUnfolder]: 493/874 cut-off events. [2023-08-30 15:41:06,996 INFO L131 PetriNetUnfolder]: For 244/288 co-relation queries the response was YES. [2023-08-30 15:41:06,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2420 conditions, 874 events. 493/874 cut-off events. For 244/288 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4512 event pairs, 380 based on Foata normal form. 45/631 useless extension candidates. Maximal degree in co-relation 2405. Up to 870 conditions per place. [2023-08-30 15:41:07,000 INFO L137 encePairwiseOnDemand]: 298/300 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-30 15:41:07,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 24 transitions, 147 flow [2023-08-30 15:41:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:41:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:41:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-30 15:41:07,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45444444444444443 [2023-08-30 15:41:07,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-30 15:41:07,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-30 15:41:07,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:07,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-30 15:41:07,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:07,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:07,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:07,005 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 111 flow. Second operand 3 states and 409 transitions. [2023-08-30 15:41:07,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 24 transitions, 147 flow [2023-08-30 15:41:07,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 136 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 15:41:07,006 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 92 flow [2023-08-30 15:41:07,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2023-08-30 15:41:07,006 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-08-30 15:41:07,006 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 92 flow [2023-08-30 15:41:07,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:07,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:07,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:07,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 15:41:07,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:07,212 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:07,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:07,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1091519694, now seen corresponding path program 1 times [2023-08-30 15:41:07,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:07,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434374375] [2023-08-30 15:41:07,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:07,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:07,252 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 15:41:07,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:07,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434374375] [2023-08-30 15:41:07,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434374375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:07,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141274256] [2023-08-30 15:41:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:07,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:07,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:07,256 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 15:41:07,258 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 15:41:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:07,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:41:07,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:07,350 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 15:41:07,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:41:07,365 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 15:41:07,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141274256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:41:07,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:41:07,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 15:41:07,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492167533] [2023-08-30 15:41:07,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:41:07,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:41:07,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:07,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:41:07,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:41:07,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-08-30 15:41:07,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 92 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:07,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:07,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-08-30 15:41:07,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:07,667 INFO L130 PetriNetUnfolder]: 1233/2066 cut-off events. [2023-08-30 15:41:07,667 INFO L131 PetriNetUnfolder]: For 196/196 co-relation queries the response was YES. [2023-08-30 15:41:07,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5652 conditions, 2066 events. 1233/2066 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11414 event pairs, 228 based on Foata normal form. 0/1394 useless extension candidates. Maximal degree in co-relation 5640. Up to 865 conditions per place. [2023-08-30 15:41:07,677 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 73 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2023-08-30 15:41:07,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 82 transitions, 446 flow [2023-08-30 15:41:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:41:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:41:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 991 transitions. [2023-08-30 15:41:07,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4719047619047619 [2023-08-30 15:41:07,680 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 991 transitions. [2023-08-30 15:41:07,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 991 transitions. [2023-08-30 15:41:07,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:07,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 991 transitions. [2023-08-30 15:41:07,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 141.57142857142858) internal successors, (991), 7 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:07,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 300.0) internal successors, (2400), 8 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:07,686 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 300.0) internal successors, (2400), 8 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:07,687 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 92 flow. Second operand 7 states and 991 transitions. [2023-08-30 15:41:07,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 82 transitions, 446 flow [2023-08-30 15:41:07,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 82 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:41:07,689 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 150 flow [2023-08-30 15:41:07,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-30 15:41:07,689 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2023-08-30 15:41:07,689 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 150 flow [2023-08-30 15:41:07,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:07,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:07,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:07,697 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 15:41:07,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:07,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:07,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:07,897 INFO L85 PathProgramCache]: Analyzing trace with hash -522626693, now seen corresponding path program 1 times [2023-08-30 15:41:07,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:07,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902717246] [2023-08-30 15:41:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:07,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:41:07,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:07,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902717246] [2023-08-30 15:41:07,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902717246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:07,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:41:07,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:41:07,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888512549] [2023-08-30 15:41:07,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:07,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:41:07,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:07,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:41:07,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:41:07,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-08-30 15:41:07,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:07,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:07,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-08-30 15:41:07,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:08,178 INFO L130 PetriNetUnfolder]: 1021/1806 cut-off events. [2023-08-30 15:41:08,178 INFO L131 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2023-08-30 15:41:08,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5479 conditions, 1806 events. 1021/1806 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10447 event pairs, 16 based on Foata normal form. 96/1494 useless extension candidates. Maximal degree in co-relation 5464. Up to 1724 conditions per place. [2023-08-30 15:41:08,193 INFO L137 encePairwiseOnDemand]: 298/300 looper letters, 33 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-30 15:41:08,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 217 flow [2023-08-30 15:41:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:41:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:41:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2023-08-30 15:41:08,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2023-08-30 15:41:08,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2023-08-30 15:41:08,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2023-08-30 15:41:08,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:08,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2023-08-30 15:41:08,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:08,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:08,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:08,199 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 150 flow. Second operand 3 states and 417 transitions. [2023-08-30 15:41:08,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 217 flow [2023-08-30 15:41:08,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 209 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 15:41:08,204 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 117 flow [2023-08-30 15:41:08,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2023-08-30 15:41:08,205 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2023-08-30 15:41:08,205 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 117 flow [2023-08-30 15:41:08,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:08,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:08,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:08,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 15:41:08,206 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:08,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:08,207 INFO L85 PathProgramCache]: Analyzing trace with hash -518182921, now seen corresponding path program 1 times [2023-08-30 15:41:08,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:08,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256258330] [2023-08-30 15:41:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:08,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:08,266 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 15:41:08,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:08,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256258330] [2023-08-30 15:41:08,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256258330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:08,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:41:08,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:41:08,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564760415] [2023-08-30 15:41:08,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:08,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:41:08,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:08,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:41:08,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:41:08,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 300 [2023-08-30 15:41:08,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:08,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:08,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 300 [2023-08-30 15:41:08,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:08,445 INFO L130 PetriNetUnfolder]: 885/1602 cut-off events. [2023-08-30 15:41:08,445 INFO L131 PetriNetUnfolder]: For 1056/1096 co-relation queries the response was YES. [2023-08-30 15:41:08,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4668 conditions, 1602 events. 885/1602 cut-off events. For 1056/1096 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8996 event pairs, 316 based on Foata normal form. 48/1290 useless extension candidates. Maximal degree in co-relation 4652. Up to 1561 conditions per place. [2023-08-30 15:41:08,452 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 27 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-30 15:41:08,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 191 flow [2023-08-30 15:41:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:41:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:41:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-30 15:41:08,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2023-08-30 15:41:08,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-30 15:41:08,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-30 15:41:08,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:08,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-30 15:41:08,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:08,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:08,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:08,457 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 117 flow. Second operand 3 states and 411 transitions. [2023-08-30 15:41:08,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 191 flow [2023-08-30 15:41:08,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:41:08,459 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 139 flow [2023-08-30 15:41:08,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2023-08-30 15:41:08,460 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2023-08-30 15:41:08,460 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 139 flow [2023-08-30 15:41:08,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:08,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:08,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:08,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 15:41:08,461 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:08,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:08,461 INFO L85 PathProgramCache]: Analyzing trace with hash 232958398, now seen corresponding path program 1 times [2023-08-30 15:41:08,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:08,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496678390] [2023-08-30 15:41:08,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:08,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:08,795 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 15:41:08,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:08,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496678390] [2023-08-30 15:41:08,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496678390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:08,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414707171] [2023-08-30 15:41:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:08,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:08,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:08,801 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 15:41:08,811 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 15:41:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:08,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 15:41:08,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:08,987 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 15:41:09,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:09,094 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 15:41:09,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:09,182 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 15:41:09,302 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 15:41:09,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:41:09,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:09,519 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 29 treesize of output 30 [2023-08-30 15:41:09,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:09,545 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 79 treesize of output 71 [2023-08-30 15:41:09,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-08-30 15:41:09,576 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 54 treesize of output 42 [2023-08-30 15:41:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:09,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414707171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:41:09,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:41:09,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-08-30 15:41:09,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103971211] [2023-08-30 15:41:09,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:41:09,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 15:41:09,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:09,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 15:41:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=284, Unknown=1, NotChecked=0, Total=342 [2023-08-30 15:41:10,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 300 [2023-08-30 15:41:10,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 139 flow. Second operand has 19 states, 19 states have (on average 107.42105263157895) internal successors, (2041), 19 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:10,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:10,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 300 [2023-08-30 15:41:10,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:12,610 INFO L130 PetriNetUnfolder]: 1508/2649 cut-off events. [2023-08-30 15:41:12,610 INFO L131 PetriNetUnfolder]: For 2105/2143 co-relation queries the response was YES. [2023-08-30 15:41:12,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9076 conditions, 2649 events. 1508/2649 cut-off events. For 2105/2143 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16352 event pairs, 396 based on Foata normal form. 38/1993 useless extension candidates. Maximal degree in co-relation 9058. Up to 1676 conditions per place. [2023-08-30 15:41:12,625 INFO L137 encePairwiseOnDemand]: 288/300 looper letters, 105 selfloop transitions, 58 changer transitions 7/171 dead transitions. [2023-08-30 15:41:12,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 171 transitions, 1182 flow [2023-08-30 15:41:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:41:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:41:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2272 transitions. [2023-08-30 15:41:12,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37866666666666665 [2023-08-30 15:41:12,633 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2272 transitions. [2023-08-30 15:41:12,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2272 transitions. [2023-08-30 15:41:12,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:12,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2272 transitions. [2023-08-30 15:41:12,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 113.6) internal successors, (2272), 20 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:12,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 300.0) internal successors, (6300), 21 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:12,648 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 300.0) internal successors, (6300), 21 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:12,648 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 139 flow. Second operand 20 states and 2272 transitions. [2023-08-30 15:41:12,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 171 transitions, 1182 flow [2023-08-30 15:41:12,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 171 transitions, 1059 flow, removed 56 selfloop flow, removed 2 redundant places. [2023-08-30 15:41:12,656 INFO L231 Difference]: Finished difference. Result has 72 places, 89 transitions, 691 flow [2023-08-30 15:41:12,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=691, PETRI_PLACES=72, PETRI_TRANSITIONS=89} [2023-08-30 15:41:12,657 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2023-08-30 15:41:12,657 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 89 transitions, 691 flow [2023-08-30 15:41:12,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 107.42105263157895) internal successors, (2041), 19 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:12,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:12,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:12,667 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 15:41:12,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:12,864 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:12,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:12,865 INFO L85 PathProgramCache]: Analyzing trace with hash 232959182, now seen corresponding path program 1 times [2023-08-30 15:41:12,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:12,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010010364] [2023-08-30 15:41:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:12,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:13,222 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 15:41:13,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:13,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010010364] [2023-08-30 15:41:13,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010010364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:13,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453210304] [2023-08-30 15:41:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:13,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:13,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:13,225 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 15:41:13,228 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 15:41:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:13,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 15:41:13,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:13,348 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 15:41:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:13,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 15:41:13,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:13,456 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 15:41:13,546 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 15:41:13,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:41:13,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:13,724 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 15:41:13,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:13,733 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 15:41:13,740 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 68 treesize of output 56 [2023-08-30 15:41:13,747 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 15:41:13,816 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 15:41:13,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453210304] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:41:13,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:41:13,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-08-30 15:41:13,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879874268] [2023-08-30 15:41:13,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:41:13,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 15:41:13,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:13,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 15:41:13,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=285, Unknown=1, NotChecked=0, Total=342 [2023-08-30 15:41:14,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:41:14,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 89 transitions, 691 flow. Second operand has 19 states, 19 states have (on average 90.42105263157895) internal successors, (1718), 19 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:14,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:14,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:41:14,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:16,679 INFO L130 PetriNetUnfolder]: 1658/3013 cut-off events. [2023-08-30 15:41:16,679 INFO L131 PetriNetUnfolder]: For 13213/13255 co-relation queries the response was YES. [2023-08-30 15:41:16,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14539 conditions, 3013 events. 1658/3013 cut-off events. For 13213/13255 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19850 event pairs, 366 based on Foata normal form. 40/2571 useless extension candidates. Maximal degree in co-relation 14508. Up to 1826 conditions per place. [2023-08-30 15:41:16,705 INFO L137 encePairwiseOnDemand]: 288/300 looper letters, 141 selfloop transitions, 76 changer transitions 4/222 dead transitions. [2023-08-30 15:41:16,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 222 transitions, 2107 flow [2023-08-30 15:41:16,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 15:41:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 15:41:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2405 transitions. [2023-08-30 15:41:16,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32066666666666666 [2023-08-30 15:41:16,714 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2405 transitions. [2023-08-30 15:41:16,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2405 transitions. [2023-08-30 15:41:16,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:16,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2405 transitions. [2023-08-30 15:41:16,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 96.2) internal successors, (2405), 25 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:16,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 300.0) internal successors, (7800), 26 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:16,732 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 300.0) internal successors, (7800), 26 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:16,732 INFO L175 Difference]: Start difference. First operand has 72 places, 89 transitions, 691 flow. Second operand 25 states and 2405 transitions. [2023-08-30 15:41:16,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 222 transitions, 2107 flow [2023-08-30 15:41:16,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 222 transitions, 2065 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-08-30 15:41:16,806 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 1139 flow [2023-08-30 15:41:16,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1139, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2023-08-30 15:41:16,807 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 63 predicate places. [2023-08-30 15:41:16,807 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 1139 flow [2023-08-30 15:41:16,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.42105263157895) internal successors, (1718), 19 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:16,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:16,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:16,818 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 15:41:17,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:17,015 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:17,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:17,015 INFO L85 PathProgramCache]: Analyzing trace with hash 240945185, now seen corresponding path program 1 times [2023-08-30 15:41:17,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:17,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61461812] [2023-08-30 15:41:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:17,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:17,377 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 15:41:17,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61461812] [2023-08-30 15:41:17,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61461812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255058186] [2023-08-30 15:41:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:17,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:17,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:17,380 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 15:41:17,382 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 15:41:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:17,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 15:41:17,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:17,514 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 15:41:17,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:17,570 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 15:41:17,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:17,699 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 15:41:17,769 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 15:41:17,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:41:17,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:17,941 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 15:41:17,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:17,952 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 175 treesize of output 159 [2023-08-30 15:41:17,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-30 15:41:17,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-08-30 15:41:18,033 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 15:41:18,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255058186] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:41:18,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:41:18,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 15:41:18,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892375890] [2023-08-30 15:41:18,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:41:18,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:41:18,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:41:18,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=307, Unknown=9, NotChecked=0, Total=380 [2023-08-30 15:41:18,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:41:18,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 1139 flow. Second operand has 20 states, 20 states have (on average 90.35) internal successors, (1807), 20 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:18,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:18,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:41:18,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:20,877 INFO L130 PetriNetUnfolder]: 1786/3161 cut-off events. [2023-08-30 15:41:20,878 INFO L131 PetriNetUnfolder]: For 18182/18224 co-relation queries the response was YES. [2023-08-30 15:41:20,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17143 conditions, 3161 events. 1786/3161 cut-off events. For 18182/18224 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20275 event pairs, 632 based on Foata normal form. 140/2979 useless extension candidates. Maximal degree in co-relation 17109. Up to 2249 conditions per place. [2023-08-30 15:41:20,898 INFO L137 encePairwiseOnDemand]: 289/300 looper letters, 136 selfloop transitions, 55 changer transitions 35/227 dead transitions. [2023-08-30 15:41:20,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 227 transitions, 2490 flow [2023-08-30 15:41:20,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:41:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:41:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2188 transitions. [2023-08-30 15:41:20,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3171014492753623 [2023-08-30 15:41:20,905 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2188 transitions. [2023-08-30 15:41:20,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2188 transitions. [2023-08-30 15:41:20,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:20,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2188 transitions. [2023-08-30 15:41:20,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 95.1304347826087) internal successors, (2188), 23 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:20,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 300.0) internal successors, (7200), 24 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:20,920 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 300.0) internal successors, (7200), 24 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:20,920 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 1139 flow. Second operand 23 states and 2188 transitions. [2023-08-30 15:41:20,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 227 transitions, 2490 flow [2023-08-30 15:41:20,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 227 transitions, 2302 flow, removed 52 selfloop flow, removed 11 redundant places. [2023-08-30 15:41:20,967 INFO L231 Difference]: Finished difference. Result has 109 places, 124 transitions, 1240 flow [2023-08-30 15:41:20,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1240, PETRI_PLACES=109, PETRI_TRANSITIONS=124} [2023-08-30 15:41:20,968 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2023-08-30 15:41:20,968 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 124 transitions, 1240 flow [2023-08-30 15:41:20,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.35) internal successors, (1807), 20 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:20,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:20,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:20,980 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 15:41:21,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 15:41:21,176 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:21,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash 265880305, now seen corresponding path program 1 times [2023-08-30 15:41:21,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:21,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838166762] [2023-08-30 15:41:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:21,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:21,608 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 15:41:21,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:21,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838166762] [2023-08-30 15:41:21,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838166762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:21,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563097016] [2023-08-30 15:41:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:21,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:21,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:21,611 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 15:41:21,613 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 15:41:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:21,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 15:41:21,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:21,754 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 15:41:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:21,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 15:41:21,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:21,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 15:41:21,913 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 15:41:21,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:41:21,945 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_343 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_343) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 2147483648)) is different from false [2023-08-30 15:41:22,028 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:22,029 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 29 treesize of output 30 [2023-08-30 15:41:22,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:22,037 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 157 treesize of output 141 [2023-08-30 15:41:22,046 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 27 treesize of output 21 [2023-08-30 15:41:22,075 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 28 treesize of output 16 [2023-08-30 15:41:22,104 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 15:41:22,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563097016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:41:22,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:41:22,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 15:41:22,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937585870] [2023-08-30 15:41:22,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:41:22,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:41:22,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:41:22,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=283, Unknown=1, NotChecked=34, Total=380 [2023-08-30 15:41:22,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:41:22,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 124 transitions, 1240 flow. Second operand has 20 states, 20 states have (on average 90.35) internal successors, (1807), 20 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:22,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:22,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:41:22,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:23,658 INFO L130 PetriNetUnfolder]: 1608/2879 cut-off events. [2023-08-30 15:41:23,659 INFO L131 PetriNetUnfolder]: For 20044/20084 co-relation queries the response was YES. [2023-08-30 15:41:23,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16195 conditions, 2879 events. 1608/2879 cut-off events. For 20044/20084 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18392 event pairs, 632 based on Foata normal form. 130/2784 useless extension candidates. Maximal degree in co-relation 16155. Up to 2143 conditions per place. [2023-08-30 15:41:23,678 INFO L137 encePairwiseOnDemand]: 289/300 looper letters, 139 selfloop transitions, 43 changer transitions 0/183 dead transitions. [2023-08-30 15:41:23,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 2097 flow [2023-08-30 15:41:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 15:41:23,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 15:41:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1704 transitions. [2023-08-30 15:41:23,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31555555555555553 [2023-08-30 15:41:23,683 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1704 transitions. [2023-08-30 15:41:23,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1704 transitions. [2023-08-30 15:41:23,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:23,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1704 transitions. [2023-08-30 15:41:23,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.66666666666667) internal successors, (1704), 18 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:23,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 300.0) internal successors, (5700), 19 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:23,693 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 300.0) internal successors, (5700), 19 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:23,693 INFO L175 Difference]: Start difference. First operand has 109 places, 124 transitions, 1240 flow. Second operand 18 states and 1704 transitions. [2023-08-30 15:41:23,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 2097 flow [2023-08-30 15:41:23,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 183 transitions, 1996 flow, removed 26 selfloop flow, removed 11 redundant places. [2023-08-30 15:41:23,744 INFO L231 Difference]: Finished difference. Result has 111 places, 117 transitions, 1184 flow [2023-08-30 15:41:23,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1184, PETRI_PLACES=111, PETRI_TRANSITIONS=117} [2023-08-30 15:41:23,746 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2023-08-30 15:41:23,746 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 117 transitions, 1184 flow [2023-08-30 15:41:23,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.35) internal successors, (1807), 20 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:23,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:23,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:23,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 15:41:23,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 15:41:23,952 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:23,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:23,953 INFO L85 PathProgramCache]: Analyzing trace with hash -127291424, now seen corresponding path program 2 times [2023-08-30 15:41:23,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:23,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147192568] [2023-08-30 15:41:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:23,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:24,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147192568] [2023-08-30 15:41:24,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147192568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822184876] [2023-08-30 15:41:24,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:41:24,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:24,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:24,526 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 15:41:24,530 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 15:41:24,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:41:24,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:24,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:41:24,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:24,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:24,658 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 15:41:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:41:24,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:41:24,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822184876] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:24,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:41:24,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-30 15:41:24,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039373677] [2023-08-30 15:41:24,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:24,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:41:24,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:24,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:41:24,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-08-30 15:41:24,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 300 [2023-08-30 15:41:24,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 117 transitions, 1184 flow. Second operand has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:24,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:24,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 300 [2023-08-30 15:41:24,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:25,129 INFO L130 PetriNetUnfolder]: 1582/2845 cut-off events. [2023-08-30 15:41:25,129 INFO L131 PetriNetUnfolder]: For 20219/20255 co-relation queries the response was YES. [2023-08-30 15:41:25,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16172 conditions, 2845 events. 1582/2845 cut-off events. For 20219/20255 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18117 event pairs, 454 based on Foata normal form. 62/2686 useless extension candidates. Maximal degree in co-relation 16132. Up to 2730 conditions per place. [2023-08-30 15:41:25,148 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 118 selfloop transitions, 14 changer transitions 9/142 dead transitions. [2023-08-30 15:41:25,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1629 flow [2023-08-30 15:41:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:41:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:41:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 615 transitions. [2023-08-30 15:41:25,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2023-08-30 15:41:25,151 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 615 transitions. [2023-08-30 15:41:25,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 615 transitions. [2023-08-30 15:41:25,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:25,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 615 transitions. [2023-08-30 15:41:25,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:25,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:25,154 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:25,154 INFO L175 Difference]: Start difference. First operand has 111 places, 117 transitions, 1184 flow. Second operand 5 states and 615 transitions. [2023-08-30 15:41:25,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1629 flow [2023-08-30 15:41:25,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 142 transitions, 1533 flow, removed 11 selfloop flow, removed 13 redundant places. [2023-08-30 15:41:25,200 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 1196 flow [2023-08-30 15:41:25,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1196, PETRI_PLACES=104, PETRI_TRANSITIONS=120} [2023-08-30 15:41:25,201 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-08-30 15:41:25,201 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 1196 flow [2023-08-30 15:41:25,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:25,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:25,201 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:25,210 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 15:41:25,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 15:41:25,410 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:25,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:25,410 INFO L85 PathProgramCache]: Analyzing trace with hash 266977678, now seen corresponding path program 2 times [2023-08-30 15:41:25,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:25,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467797503] [2023-08-30 15:41:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:25,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:41:25,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:25,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467797503] [2023-08-30 15:41:25,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467797503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:25,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893832374] [2023-08-30 15:41:25,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:41:25,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:25,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:25,492 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 15:41:25,494 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 15:41:25,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:41:25,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:25,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:41:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 15:41:25,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:41:25,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893832374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:25,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:41:25,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-30 15:41:25,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368736173] [2023-08-30 15:41:25,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:25,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:41:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:25,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:41:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:41:25,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-08-30 15:41:25,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 120 transitions, 1196 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:25,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:25,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-08-30 15:41:25,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:25,973 INFO L130 PetriNetUnfolder]: 1412/2549 cut-off events. [2023-08-30 15:41:25,974 INFO L131 PetriNetUnfolder]: For 21701/21737 co-relation queries the response was YES. [2023-08-30 15:41:25,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14973 conditions, 2549 events. 1412/2549 cut-off events. For 21701/21737 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 16015 event pairs, 796 based on Foata normal form. 129/2579 useless extension candidates. Maximal degree in co-relation 14931. Up to 2545 conditions per place. [2023-08-30 15:41:25,988 INFO L137 encePairwiseOnDemand]: 298/300 looper letters, 104 selfloop transitions, 1 changer transitions 7/113 dead transitions. [2023-08-30 15:41:25,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 113 transitions, 1312 flow [2023-08-30 15:41:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:41:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:41:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-08-30 15:41:25,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45222222222222225 [2023-08-30 15:41:25,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-08-30 15:41:25,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-08-30 15:41:25,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:25,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-08-30 15:41:25,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:25,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:25,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:25,993 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 1196 flow. Second operand 3 states and 407 transitions. [2023-08-30 15:41:25,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 113 transitions, 1312 flow [2023-08-30 15:41:26,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 113 transitions, 1205 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-08-30 15:41:26,042 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 909 flow [2023-08-30 15:41:26,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=909, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2023-08-30 15:41:26,043 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2023-08-30 15:41:26,043 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 909 flow [2023-08-30 15:41:26,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:26,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:26,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:26,051 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 15:41:26,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 15:41:26,249 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:26,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash -127741973, now seen corresponding path program 2 times [2023-08-30 15:41:26,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:26,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33729812] [2023-08-30 15:41:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:26,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:26,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:26,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33729812] [2023-08-30 15:41:26,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33729812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:26,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105433392] [2023-08-30 15:41:26,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:41:26,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:26,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:26,997 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 15:41:27,001 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 15:41:27,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:41:27,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:27,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 15:41:27,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:41:27,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:41:27,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105433392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:27,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:41:27,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-08-30 15:41:27,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053587841] [2023-08-30 15:41:27,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:27,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:41:27,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:41:27,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:41:27,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 15:41:27,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 909 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:27,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:27,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 15:41:27,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:27,423 INFO L130 PetriNetUnfolder]: 1173/2210 cut-off events. [2023-08-30 15:41:27,423 INFO L131 PetriNetUnfolder]: For 16569/16588 co-relation queries the response was YES. [2023-08-30 15:41:27,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12245 conditions, 2210 events. 1173/2210 cut-off events. For 16569/16588 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14112 event pairs, 339 based on Foata normal form. 29/2232 useless extension candidates. Maximal degree in co-relation 12206. Up to 2115 conditions per place. [2023-08-30 15:41:27,434 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 101 selfloop transitions, 11 changer transitions 6/119 dead transitions. [2023-08-30 15:41:27,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 1199 flow [2023-08-30 15:41:27,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:41:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:41:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 633 transitions. [2023-08-30 15:41:27,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422 [2023-08-30 15:41:27,436 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 633 transitions. [2023-08-30 15:41:27,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 633 transitions. [2023-08-30 15:41:27,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:27,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 633 transitions. [2023-08-30 15:41:27,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:27,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:27,439 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:27,440 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 909 flow. Second operand 5 states and 633 transitions. [2023-08-30 15:41:27,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 1199 flow [2023-08-30 15:41:27,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 119 transitions, 1198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:41:27,477 INFO L231 Difference]: Finished difference. Result has 103 places, 105 transitions, 928 flow [2023-08-30 15:41:27,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=928, PETRI_PLACES=103, PETRI_TRANSITIONS=105} [2023-08-30 15:41:27,478 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2023-08-30 15:41:27,478 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 105 transitions, 928 flow [2023-08-30 15:41:27,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:27,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:27,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:27,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-30 15:41:27,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 15:41:27,685 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:27,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:27,686 INFO L85 PathProgramCache]: Analyzing trace with hash -135164950, now seen corresponding path program 2 times [2023-08-30 15:41:27,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:27,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462728916] [2023-08-30 15:41:27,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:27,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:28,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:28,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462728916] [2023-08-30 15:41:28,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462728916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:28,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823499027] [2023-08-30 15:41:28,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:41:28,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:28,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:28,538 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 15:41:28,541 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 15:41:28,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:41:28,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:28,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 15:41:28,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:41:28,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:41:28,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823499027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:28,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:41:28,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-08-30 15:41:28,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535894312] [2023-08-30 15:41:28,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:28,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:41:28,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:41:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:41:28,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 15:41:28,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 928 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:28,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:28,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 15:41:28,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:29,102 INFO L130 PetriNetUnfolder]: 1549/2744 cut-off events. [2023-08-30 15:41:29,102 INFO L131 PetriNetUnfolder]: For 25072/25095 co-relation queries the response was YES. [2023-08-30 15:41:29,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15912 conditions, 2744 events. 1549/2744 cut-off events. For 25072/25095 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17023 event pairs, 174 based on Foata normal form. 89/2826 useless extension candidates. Maximal degree in co-relation 15870. Up to 2055 conditions per place. [2023-08-30 15:41:29,119 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 107 selfloop transitions, 32 changer transitions 0/140 dead transitions. [2023-08-30 15:41:29,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 140 transitions, 1509 flow [2023-08-30 15:41:29,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:41:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:41:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 640 transitions. [2023-08-30 15:41:29,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2023-08-30 15:41:29,122 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 640 transitions. [2023-08-30 15:41:29,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 640 transitions. [2023-08-30 15:41:29,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:29,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 640 transitions. [2023-08-30 15:41:29,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.0) internal successors, (640), 5 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 15:41:29,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:29,129 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:29,130 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 928 flow. Second operand 5 states and 640 transitions. [2023-08-30 15:41:29,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 140 transitions, 1509 flow [2023-08-30 15:41:29,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 140 transitions, 1475 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 15:41:29,167 INFO L231 Difference]: Finished difference. Result has 105 places, 110 transitions, 1079 flow [2023-08-30 15:41:29,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1079, PETRI_PLACES=105, PETRI_TRANSITIONS=110} [2023-08-30 15:41:29,167 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-08-30 15:41:29,167 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 110 transitions, 1079 flow [2023-08-30 15:41:29,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:29,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:29,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:29,173 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 15:41:29,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 15:41:29,368 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:29,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:29,369 INFO L85 PathProgramCache]: Analyzing trace with hash -127715973, now seen corresponding path program 2 times [2023-08-30 15:41:29,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:29,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247717712] [2023-08-30 15:41:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:29,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:29,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247717712] [2023-08-30 15:41:29,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247717712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:29,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221340097] [2023-08-30 15:41:29,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:41:29,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:29,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:29,967 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 15:41:29,992 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 15:41:30,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:41:30,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:30,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 15:41:30,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:41:30,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:41:30,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221340097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:30,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:41:30,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-08-30 15:41:30,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030707757] [2023-08-30 15:41:30,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:30,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:41:30,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:30,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:41:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:41:30,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 15:41:30,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 110 transitions, 1079 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:30,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:30,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 15:41:30,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:30,602 INFO L130 PetriNetUnfolder]: 1460/2625 cut-off events. [2023-08-30 15:41:30,602 INFO L131 PetriNetUnfolder]: For 28093/28113 co-relation queries the response was YES. [2023-08-30 15:41:30,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16185 conditions, 2625 events. 1460/2625 cut-off events. For 28093/28113 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16465 event pairs, 186 based on Foata normal form. 92/2715 useless extension candidates. Maximal degree in co-relation 16142. Up to 1936 conditions per place. [2023-08-30 15:41:30,621 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 102 selfloop transitions, 30 changer transitions 0/133 dead transitions. [2023-08-30 15:41:30,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 1492 flow [2023-08-30 15:41:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:41:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:41:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 639 transitions. [2023-08-30 15:41:30,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426 [2023-08-30 15:41:30,624 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 639 transitions. [2023-08-30 15:41:30,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 639 transitions. [2023-08-30 15:41:30,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:30,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 639 transitions. [2023-08-30 15:41:30,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:30,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:30,628 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:30,628 INFO L175 Difference]: Start difference. First operand has 105 places, 110 transitions, 1079 flow. Second operand 5 states and 639 transitions. [2023-08-30 15:41:30,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 1492 flow [2023-08-30 15:41:30,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 133 transitions, 1406 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-30 15:41:30,694 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 970 flow [2023-08-30 15:41:30,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=970, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2023-08-30 15:41:30,694 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-08-30 15:41:30,695 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 970 flow [2023-08-30 15:41:30,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:30,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:30,695 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:30,703 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 15:41:30,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:30,901 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:30,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:30,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1342273889, now seen corresponding path program 3 times [2023-08-30 15:41:30,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:30,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530869418] [2023-08-30 15:41:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:30,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:31,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:31,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530869418] [2023-08-30 15:41:31,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530869418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:31,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081385307] [2023-08-30 15:41:31,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:41:31,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:31,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:31,473 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 15:41:31,483 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 15:41:31,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 15:41:31,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:31,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:41:31,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:31,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:31,658 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 15:41:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:41:31,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:41:31,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081385307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:31,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:41:31,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-30 15:41:31,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256453582] [2023-08-30 15:41:31,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:31,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:41:31,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:41:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-08-30 15:41:31,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 300 [2023-08-30 15:41:31,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 970 flow. Second operand has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:31,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:31,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 300 [2023-08-30 15:41:31,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:32,210 INFO L130 PetriNetUnfolder]: 1452/2617 cut-off events. [2023-08-30 15:41:32,210 INFO L131 PetriNetUnfolder]: For 23712/23732 co-relation queries the response was YES. [2023-08-30 15:41:32,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15517 conditions, 2617 events. 1452/2617 cut-off events. For 23712/23732 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16379 event pairs, 492 based on Foata normal form. 28/2595 useless extension candidates. Maximal degree in co-relation 15475. Up to 2519 conditions per place. [2023-08-30 15:41:32,225 INFO L137 encePairwiseOnDemand]: 294/300 looper letters, 95 selfloop transitions, 10 changer transitions 6/112 dead transitions. [2023-08-30 15:41:32,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 1219 flow [2023-08-30 15:41:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:41:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:41:32,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 608 transitions. [2023-08-30 15:41:32,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053333333333333 [2023-08-30 15:41:32,227 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 608 transitions. [2023-08-30 15:41:32,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 608 transitions. [2023-08-30 15:41:32,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:32,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 608 transitions. [2023-08-30 15:41:32,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.6) internal successors, (608), 5 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:32,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:32,230 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:32,230 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 970 flow. Second operand 5 states and 608 transitions. [2023-08-30 15:41:32,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 1219 flow [2023-08-30 15:41:32,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 112 transitions, 1159 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 15:41:32,274 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 911 flow [2023-08-30 15:41:32,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=911, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2023-08-30 15:41:32,275 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-08-30 15:41:32,275 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 911 flow [2023-08-30 15:41:32,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:32,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:32,276 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:32,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-30 15:41:32,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:32,481 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:32,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1367208956, now seen corresponding path program 3 times [2023-08-30 15:41:32,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:32,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883638043] [2023-08-30 15:41:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:32,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:33,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:33,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883638043] [2023-08-30 15:41:33,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883638043] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:33,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183991044] [2023-08-30 15:41:33,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:41:33,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:33,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:33,404 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 15:41:33,407 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 15:41:33,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 15:41:33,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:33,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 15:41:33,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:33,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:33,577 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 15:41:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:41:33,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:41:33,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183991044] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:33,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:41:33,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-30 15:41:33,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506933102] [2023-08-30 15:41:33,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:33,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:41:33,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:33,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:41:33,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-08-30 15:41:33,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 300 [2023-08-30 15:41:33,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 911 flow. Second operand has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:33,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:33,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 300 [2023-08-30 15:41:33,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:34,087 INFO L130 PetriNetUnfolder]: 1558/2753 cut-off events. [2023-08-30 15:41:34,087 INFO L131 PetriNetUnfolder]: For 25151/25171 co-relation queries the response was YES. [2023-08-30 15:41:34,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16328 conditions, 2753 events. 1558/2753 cut-off events. For 25151/25171 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17052 event pairs, 126 based on Foata normal form. 68/2771 useless extension candidates. Maximal degree in co-relation 16286. Up to 1422 conditions per place. [2023-08-30 15:41:34,109 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 77 selfloop transitions, 43 changer transitions 1/122 dead transitions. [2023-08-30 15:41:34,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 122 transitions, 1339 flow [2023-08-30 15:41:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:41:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:41:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 613 transitions. [2023-08-30 15:41:34,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4086666666666667 [2023-08-30 15:41:34,112 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 613 transitions. [2023-08-30 15:41:34,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 613 transitions. [2023-08-30 15:41:34,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:34,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 613 transitions. [2023-08-30 15:41:34,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:34,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:34,116 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:34,116 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 911 flow. Second operand 5 states and 613 transitions. [2023-08-30 15:41:34,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 122 transitions, 1339 flow [2023-08-30 15:41:34,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 122 transitions, 1308 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-30 15:41:34,171 INFO L231 Difference]: Finished difference. Result has 104 places, 103 transitions, 1071 flow [2023-08-30 15:41:34,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1071, PETRI_PLACES=104, PETRI_TRANSITIONS=103} [2023-08-30 15:41:34,171 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-08-30 15:41:34,172 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 103 transitions, 1071 flow [2023-08-30 15:41:34,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:34,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:34,172 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:34,178 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 15:41:34,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:34,378 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:34,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:34,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1367209009, now seen corresponding path program 3 times [2023-08-30 15:41:34,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:34,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249636105] [2023-08-30 15:41:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:34,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:35,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:35,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249636105] [2023-08-30 15:41:35,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249636105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:35,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922986725] [2023-08-30 15:41:35,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:41:35,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:35,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:35,144 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 15:41:35,146 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 15:41:35,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 15:41:35,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:35,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:41:35,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:35,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:35,318 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 15:41:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:41:35,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:41:35,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922986725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:35,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:41:35,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-30 15:41:35,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802071620] [2023-08-30 15:41:35,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:35,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:41:35,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:41:35,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-30 15:41:35,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 300 [2023-08-30 15:41:35,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 103 transitions, 1071 flow. Second operand has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:35,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:35,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 300 [2023-08-30 15:41:35,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:35,845 INFO L130 PetriNetUnfolder]: 1498/2677 cut-off events. [2023-08-30 15:41:35,846 INFO L131 PetriNetUnfolder]: For 27697/27717 co-relation queries the response was YES. [2023-08-30 15:41:35,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17072 conditions, 2677 events. 1498/2677 cut-off events. For 27697/27717 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 16722 event pairs, 126 based on Foata normal form. 84/2711 useless extension candidates. Maximal degree in co-relation 17029. Up to 1346 conditions per place. [2023-08-30 15:41:35,859 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 77 selfloop transitions, 41 changer transitions 1/120 dead transitions. [2023-08-30 15:41:35,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 120 transitions, 1409 flow [2023-08-30 15:41:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:41:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:41:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 612 transitions. [2023-08-30 15:41:35,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408 [2023-08-30 15:41:35,861 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 612 transitions. [2023-08-30 15:41:35,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 612 transitions. [2023-08-30 15:41:35,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:35,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 612 transitions. [2023-08-30 15:41:35,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:35,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:35,864 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:35,865 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 1071 flow. Second operand 5 states and 612 transitions. [2023-08-30 15:41:35,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 120 transitions, 1409 flow [2023-08-30 15:41:35,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 120 transitions, 1352 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 15:41:35,920 INFO L231 Difference]: Finished difference. Result has 104 places, 101 transitions, 1056 flow [2023-08-30 15:41:35,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1056, PETRI_PLACES=104, PETRI_TRANSITIONS=101} [2023-08-30 15:41:35,920 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-08-30 15:41:35,921 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 1056 flow [2023-08-30 15:41:35,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:35,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:35,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:35,931 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 15:41:36,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:36,129 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:36,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1364709197, now seen corresponding path program 1 times [2023-08-30 15:41:36,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:36,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735382410] [2023-08-30 15:41:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:36,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:41:36,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:36,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735382410] [2023-08-30 15:41:36,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735382410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:36,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:41:36,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:41:36,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94086809] [2023-08-30 15:41:36,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:36,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:41:36,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:36,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:41:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:41:36,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 300 [2023-08-30 15:41:36,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 1056 flow. Second operand has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 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 15:41:36,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:36,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 300 [2023-08-30 15:41:36,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:36,585 INFO L130 PetriNetUnfolder]: 1801/3398 cut-off events. [2023-08-30 15:41:36,586 INFO L131 PetriNetUnfolder]: For 34690/34710 co-relation queries the response was YES. [2023-08-30 15:41:36,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21184 conditions, 3398 events. 1801/3398 cut-off events. For 34690/34710 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22749 event pairs, 381 based on Foata normal form. 294/3644 useless extension candidates. Maximal degree in co-relation 21143. Up to 2443 conditions per place. [2023-08-30 15:41:36,604 INFO L137 encePairwiseOnDemand]: 294/300 looper letters, 88 selfloop transitions, 46 changer transitions 1/136 dead transitions. [2023-08-30 15:41:36,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 136 transitions, 1709 flow [2023-08-30 15:41:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:41:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:41:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 549 transitions. [2023-08-30 15:41:36,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2023-08-30 15:41:36,605 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 549 transitions. [2023-08-30 15:41:36,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 549 transitions. [2023-08-30 15:41:36,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:36,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 549 transitions. [2023-08-30 15:41:36,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:36,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:36,608 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:36,608 INFO L175 Difference]: Start difference. First operand has 104 places, 101 transitions, 1056 flow. Second operand 4 states and 549 transitions. [2023-08-30 15:41:36,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 136 transitions, 1709 flow [2023-08-30 15:41:36,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 1597 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 15:41:36,651 INFO L231 Difference]: Finished difference. Result has 105 places, 121 transitions, 1428 flow [2023-08-30 15:41:36,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1428, PETRI_PLACES=105, PETRI_TRANSITIONS=121} [2023-08-30 15:41:36,651 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-08-30 15:41:36,651 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 121 transitions, 1428 flow [2023-08-30 15:41:36,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 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 15:41:36,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:36,652 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:36,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 15:41:36,652 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:36,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1343609976, now seen corresponding path program 3 times [2023-08-30 15:41:36,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:36,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602586852] [2023-08-30 15:41:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:36,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:37,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:37,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602586852] [2023-08-30 15:41:37,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602586852] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:37,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184194525] [2023-08-30 15:41:37,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:41:37,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:37,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:37,177 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 15:41:37,187 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 15:41:37,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 15:41:37,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:37,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 15:41:37,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:41:37,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:41:37,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184194525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:41:37,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:41:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-08-30 15:41:37,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793665792] [2023-08-30 15:41:37,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:37,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:41:37,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:37,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:41:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:41:37,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 15:41:37,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 121 transitions, 1428 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:37,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:37,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 15:41:37,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:37,741 INFO L130 PetriNetUnfolder]: 1794/3379 cut-off events. [2023-08-30 15:41:37,741 INFO L131 PetriNetUnfolder]: For 37448/37468 co-relation queries the response was YES. [2023-08-30 15:41:37,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23035 conditions, 3379 events. 1794/3379 cut-off events. For 37448/37468 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22393 event pairs, 584 based on Foata normal form. 28/3359 useless extension candidates. Maximal degree in co-relation 22992. Up to 3305 conditions per place. [2023-08-30 15:41:37,763 INFO L137 encePairwiseOnDemand]: 295/300 looper letters, 115 selfloop transitions, 9 changer transitions 1/126 dead transitions. [2023-08-30 15:41:37,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 126 transitions, 1685 flow [2023-08-30 15:41:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:41:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:41:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 507 transitions. [2023-08-30 15:41:37,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2023-08-30 15:41:37,765 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 507 transitions. [2023-08-30 15:41:37,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 507 transitions. [2023-08-30 15:41:37,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:37,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 507 transitions. [2023-08-30 15:41:37,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:37,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:37,768 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:37,768 INFO L175 Difference]: Start difference. First operand has 105 places, 121 transitions, 1428 flow. Second operand 4 states and 507 transitions. [2023-08-30 15:41:37,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 126 transitions, 1685 flow [2023-08-30 15:41:37,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 126 transitions, 1597 flow, removed 44 selfloop flow, removed 0 redundant places. [2023-08-30 15:41:37,884 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 1348 flow [2023-08-30 15:41:37,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1348, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2023-08-30 15:41:37,884 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2023-08-30 15:41:37,884 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 1348 flow [2023-08-30 15:41:37,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:37,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:37,885 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:37,893 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 15:41:38,089 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 15:41:38,090 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:38,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:38,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1334287049, now seen corresponding path program 4 times [2023-08-30 15:41:38,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:38,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658715719] [2023-08-30 15:41:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:38,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:38,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:38,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658715719] [2023-08-30 15:41:38,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658715719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:38,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062980201] [2023-08-30 15:41:38,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:41:38,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:38,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:38,766 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 15:41:38,792 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 15:41:38,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:41:38,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:38,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 15:41:38,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:41:38,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:41:38,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:38,992 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 19 [2023-08-30 15:41:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:41:39,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062980201] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:39,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:41:39,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 15 [2023-08-30 15:41:39,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154894843] [2023-08-30 15:41:39,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:39,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:41:39,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:39,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:41:39,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-08-30 15:41:39,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 15:41:39,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 1348 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:39,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:39,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 15:41:39,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:39,511 INFO L130 PetriNetUnfolder]: 1730/3291 cut-off events. [2023-08-30 15:41:39,511 INFO L131 PetriNetUnfolder]: For 28371/28391 co-relation queries the response was YES. [2023-08-30 15:41:39,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20458 conditions, 3291 events. 1730/3291 cut-off events. For 28371/28391 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21931 event pairs, 222 based on Foata normal form. 28/3319 useless extension candidates. Maximal degree in co-relation 20413. Up to 2854 conditions per place. [2023-08-30 15:41:39,527 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 104 selfloop transitions, 24 changer transitions 1/130 dead transitions. [2023-08-30 15:41:39,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 130 transitions, 1672 flow [2023-08-30 15:41:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:41:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:41:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 511 transitions. [2023-08-30 15:41:39,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42583333333333334 [2023-08-30 15:41:39,529 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 511 transitions. [2023-08-30 15:41:39,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 511 transitions. [2023-08-30 15:41:39,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:39,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 511 transitions. [2023-08-30 15:41:39,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.75) internal successors, (511), 4 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 15:41:39,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:39,531 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:39,531 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 1348 flow. Second operand 4 states and 511 transitions. [2023-08-30 15:41:39,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 130 transitions, 1672 flow [2023-08-30 15:41:39,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 130 transitions, 1657 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:41:39,575 INFO L231 Difference]: Finished difference. Result has 107 places, 116 transitions, 1320 flow [2023-08-30 15:41:39,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1320, PETRI_PLACES=107, PETRI_TRANSITIONS=116} [2023-08-30 15:41:39,576 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 76 predicate places. [2023-08-30 15:41:39,576 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 116 transitions, 1320 flow [2023-08-30 15:41:39,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:39,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:39,576 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:39,581 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 15:41:39,777 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 15:41:39,777 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:39,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:39,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1343610813, now seen corresponding path program 4 times [2023-08-30 15:41:39,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:39,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557878358] [2023-08-30 15:41:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:39,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:40,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:40,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557878358] [2023-08-30 15:41:40,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557878358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:40,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839032052] [2023-08-30 15:41:40,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:41:40,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:40,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:40,436 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 15:41:40,439 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 15:41:40,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:41:40,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:40,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 15:41:40,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:41:40,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:41:40,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:40,649 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 15:41:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:41:40,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839032052] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:40,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:41:40,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 15 [2023-08-30 15:41:40,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338256368] [2023-08-30 15:41:40,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:41:40,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:41:40,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:40,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:41:40,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-08-30 15:41:40,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 15:41:40,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 116 transitions, 1320 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:40,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:40,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 15:41:40,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:41,198 INFO L130 PetriNetUnfolder]: 1664/3184 cut-off events. [2023-08-30 15:41:41,199 INFO L131 PetriNetUnfolder]: For 28977/28997 co-relation queries the response was YES. [2023-08-30 15:41:41,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19699 conditions, 3184 events. 1664/3184 cut-off events. For 28977/28997 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21300 event pairs, 222 based on Foata normal form. 68/3252 useless extension candidates. Maximal degree in co-relation 19654. Up to 2780 conditions per place. [2023-08-30 15:41:41,225 INFO L137 encePairwiseOnDemand]: 294/300 looper letters, 104 selfloop transitions, 22 changer transitions 0/127 dead transitions. [2023-08-30 15:41:41,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 127 transitions, 1632 flow [2023-08-30 15:41:41,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:41:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:41:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2023-08-30 15:41:41,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241666666666667 [2023-08-30 15:41:41,227 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2023-08-30 15:41:41,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2023-08-30 15:41:41,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:41,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2023-08-30 15:41:41,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.25) internal successors, (509), 4 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 15:41:41,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:41,230 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:41,231 INFO L175 Difference]: Start difference. First operand has 107 places, 116 transitions, 1320 flow. Second operand 4 states and 509 transitions. [2023-08-30 15:41:41,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 127 transitions, 1632 flow [2023-08-30 15:41:41,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 127 transitions, 1539 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-30 15:41:41,296 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 1225 flow [2023-08-30 15:41:41,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1225, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2023-08-30 15:41:41,298 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2023-08-30 15:41:41,298 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 1225 flow [2023-08-30 15:41:41,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:41,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:41,298 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:41,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 15:41:41,503 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 15:41:41,503 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:41,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash -784322498, now seen corresponding path program 1 times [2023-08-30 15:41:41,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:41,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771118485] [2023-08-30 15:41:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:41,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:41:41,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:41,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771118485] [2023-08-30 15:41:41,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771118485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:41,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307034968] [2023-08-30 15:41:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:41,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:41,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:41,585 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 15:41:41,613 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 15:41:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:41,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 15:41:41,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:41:41,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:41:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:41:41,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307034968] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:41:41,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:41:41,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 15:41:41,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817077710] [2023-08-30 15:41:41,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:41:41,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 15:41:41,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:41,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 15:41:41,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:41:41,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 300 [2023-08-30 15:41:41,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 1225 flow. Second operand has 12 states, 12 states have (on average 123.75) internal successors, (1485), 12 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:41,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:41,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 300 [2023-08-30 15:41:41,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:42,158 INFO L130 PetriNetUnfolder]: 1191/2319 cut-off events. [2023-08-30 15:41:42,159 INFO L131 PetriNetUnfolder]: For 18572/18592 co-relation queries the response was YES. [2023-08-30 15:41:42,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14096 conditions, 2319 events. 1191/2319 cut-off events. For 18572/18592 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14467 event pairs, 708 based on Foata normal form. 35/2354 useless extension candidates. Maximal degree in co-relation 14057. Up to 2281 conditions per place. [2023-08-30 15:41:42,171 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 71 selfloop transitions, 3 changer transitions 16/91 dead transitions. [2023-08-30 15:41:42,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 91 transitions, 1127 flow [2023-08-30 15:41:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:41:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:41:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 762 transitions. [2023-08-30 15:41:42,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2023-08-30 15:41:42,173 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 762 transitions. [2023-08-30 15:41:42,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 762 transitions. [2023-08-30 15:41:42,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:42,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 762 transitions. [2023-08-30 15:41:42,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.0) internal successors, (762), 6 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:42,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 300.0) internal successors, (2100), 7 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:42,176 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 300.0) internal successors, (2100), 7 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:42,176 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 1225 flow. Second operand 6 states and 762 transitions. [2023-08-30 15:41:42,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 91 transitions, 1127 flow [2023-08-30 15:41:42,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 1046 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-08-30 15:41:42,210 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 738 flow [2023-08-30 15:41:42,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2023-08-30 15:41:42,210 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2023-08-30 15:41:42,210 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 738 flow [2023-08-30 15:41:42,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 123.75) internal successors, (1485), 12 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:42,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:42,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:42,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 15:41:42,416 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 15:41:42,416 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:42,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:42,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1822530941, now seen corresponding path program 2 times [2023-08-30 15:41:42,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:42,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31996836] [2023-08-30 15:41:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:42,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:42,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:42,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31996836] [2023-08-30 15:41:42,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31996836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:42,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069325581] [2023-08-30 15:41:42,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:41:42,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:42,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:42,889 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 15:41:42,892 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 15:41:43,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:41:43,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:43,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:41:43,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:41:43,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:41:43,198 INFO L321 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-30 15:41:43,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2023-08-30 15:41:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:41:43,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069325581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:41:43,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:41:43,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 18 [2023-08-30 15:41:43,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362054629] [2023-08-30 15:41:43,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:41:43,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:41:43,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:43,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:41:43,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-30 15:41:43,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 15:41:43,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 738 flow. Second operand has 20 states, 20 states have (on average 114.5) internal successors, (2290), 20 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:43,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:43,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 15:41:43,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:44,753 INFO L130 PetriNetUnfolder]: 1994/3657 cut-off events. [2023-08-30 15:41:44,753 INFO L131 PetriNetUnfolder]: For 24338/24354 co-relation queries the response was YES. [2023-08-30 15:41:44,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20931 conditions, 3657 events. 1994/3657 cut-off events. For 24338/24354 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23966 event pairs, 289 based on Foata normal form. 98/3755 useless extension candidates. Maximal degree in co-relation 20897. Up to 2204 conditions per place. [2023-08-30 15:41:44,769 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 143 selfloop transitions, 84 changer transitions 1/229 dead transitions. [2023-08-30 15:41:44,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 229 transitions, 2373 flow [2023-08-30 15:41:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 15:41:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 15:41:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3322 transitions. [2023-08-30 15:41:44,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954761904761905 [2023-08-30 15:41:44,773 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3322 transitions. [2023-08-30 15:41:44,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3322 transitions. [2023-08-30 15:41:44,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:44,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3322 transitions. [2023-08-30 15:41:44,778 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 15:41:44,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 300.0) internal successors, (8700), 29 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:44,784 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 300.0) internal successors, (8700), 29 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:44,784 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 738 flow. Second operand 28 states and 3322 transitions. [2023-08-30 15:41:44,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 229 transitions, 2373 flow [2023-08-30 15:41:44,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 229 transitions, 2311 flow, removed 28 selfloop flow, removed 6 redundant places. [2023-08-30 15:41:44,848 INFO L231 Difference]: Finished difference. Result has 102 places, 133 transitions, 1666 flow [2023-08-30 15:41:44,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1666, PETRI_PLACES=102, PETRI_TRANSITIONS=133} [2023-08-30 15:41:44,849 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2023-08-30 15:41:44,849 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 133 transitions, 1666 flow [2023-08-30 15:41:44,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 114.5) internal successors, (2290), 20 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:44,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:44,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:44,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-30 15:41:45,054 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 15:41:45,055 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:45,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:45,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1819042458, now seen corresponding path program 2 times [2023-08-30 15:41:45,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:45,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341637579] [2023-08-30 15:41:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:45,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:45,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:45,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341637579] [2023-08-30 15:41:45,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341637579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:45,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647263327] [2023-08-30 15:41:45,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:41:45,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:45,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:45,590 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 15:41:45,616 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 15:41:45,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:41:45,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:41:45,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 15:41:45,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:45,778 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 15:41:45,822 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 15:41:45,853 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 15:41:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:46,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:41:46,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:46,458 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 63 treesize of output 51 [2023-08-30 15:41:46,469 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 15:41:46,469 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 152 treesize of output 140 [2023-08-30 15:41:46,478 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 15:41:46,479 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 135 treesize of output 109 [2023-08-30 15:41:46,495 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 15:41:46,496 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 84 treesize of output 71 [2023-08-30 15:41:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:46,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647263327] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:41:46,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:41:46,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-30 15:41:46,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626063628] [2023-08-30 15:41:46,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:41:46,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 15:41:46,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:46,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 15:41:46,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=545, Unknown=1, NotChecked=0, Total=702 [2023-08-30 15:41:47,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:41:47,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 133 transitions, 1666 flow. Second operand has 27 states, 27 states have (on average 90.33333333333333) internal successors, (2439), 27 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:47,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:41:47,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:41:47,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:41:49,425 INFO L130 PetriNetUnfolder]: 2177/3992 cut-off events. [2023-08-30 15:41:49,426 INFO L131 PetriNetUnfolder]: For 37343/37359 co-relation queries the response was YES. [2023-08-30 15:41:49,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25447 conditions, 3992 events. 2177/3992 cut-off events. For 37343/37359 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26646 event pairs, 668 based on Foata normal form. 307/4299 useless extension candidates. Maximal degree in co-relation 25408. Up to 2267 conditions per place. [2023-08-30 15:41:49,444 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 193 selfloop transitions, 117 changer transitions 8/319 dead transitions. [2023-08-30 15:41:49,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 319 transitions, 4195 flow [2023-08-30 15:41:49,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 15:41:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 15:41:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2567 transitions. [2023-08-30 15:41:49,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3169135802469136 [2023-08-30 15:41:49,448 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2567 transitions. [2023-08-30 15:41:49,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2567 transitions. [2023-08-30 15:41:49,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:41:49,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2567 transitions. [2023-08-30 15:41:49,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 95.07407407407408) internal successors, (2567), 27 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:49,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 300.0) internal successors, (8400), 28 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:49,457 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 300.0) internal successors, (8400), 28 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:49,457 INFO L175 Difference]: Start difference. First operand has 102 places, 133 transitions, 1666 flow. Second operand 27 states and 2567 transitions. [2023-08-30 15:41:49,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 319 transitions, 4195 flow [2023-08-30 15:41:49,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 319 transitions, 3689 flow, removed 241 selfloop flow, removed 4 redundant places. [2023-08-30 15:41:49,533 INFO L231 Difference]: Finished difference. Result has 136 places, 204 transitions, 2777 flow [2023-08-30 15:41:49,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2777, PETRI_PLACES=136, PETRI_TRANSITIONS=204} [2023-08-30 15:41:49,534 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 105 predicate places. [2023-08-30 15:41:49,534 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 204 transitions, 2777 flow [2023-08-30 15:41:49,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 90.33333333333333) internal successors, (2439), 27 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:41:49,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:41:49,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:41:49,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-30 15:41:49,736 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 15:41:49,736 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:41:49,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:41:49,737 INFO L85 PathProgramCache]: Analyzing trace with hash 419810221, now seen corresponding path program 1 times [2023-08-30 15:41:49,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:41:49,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736750612] [2023-08-30 15:41:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:49,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:41:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:50,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:41:50,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736750612] [2023-08-30 15:41:50,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736750612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:41:50,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499457618] [2023-08-30 15:41:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:41:50,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:41:50,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:41:50,235 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 15:41:50,260 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 15:41:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:41:50,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 15:41:50,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:41:50,415 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 15:41:50,458 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 15:41:50,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:50,502 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 15:41:50,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:41:50,580 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 15:41:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:50,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:41:51,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:51,146 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 115 treesize of output 80 [2023-08-30 15:41:51,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:51,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 405 treesize of output 391 [2023-08-30 15:41:51,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:51,202 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 108 treesize of output 106 [2023-08-30 15:41:51,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:41:51,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 91 [2023-08-30 15:41:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:41:52,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499457618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:41:52,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:41:52,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 15:41:52,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181491835] [2023-08-30 15:41:52,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:41:52,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:41:52,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:41:52,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:41:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=686, Unknown=4, NotChecked=0, Total=812 [2023-08-30 15:41:54,365 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 15:41:56,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:41:58,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:42:00,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:42:02,893 WARN L539 Checker$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 15:42:03,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:42:03,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 204 transitions, 2777 flow. Second operand has 29 states, 29 states have (on average 90.24137931034483) internal successors, (2617), 29 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:03,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:42:03,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:42:03,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:42:05,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:42:07,268 INFO L130 PetriNetUnfolder]: 1521/2930 cut-off events. [2023-08-30 15:42:07,268 INFO L131 PetriNetUnfolder]: For 44460/44474 co-relation queries the response was YES. [2023-08-30 15:42:07,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19711 conditions, 2930 events. 1521/2930 cut-off events. For 44460/44474 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19177 event pairs, 659 based on Foata normal form. 179/3025 useless extension candidates. Maximal degree in co-relation 19656. Up to 2249 conditions per place. [2023-08-30 15:42:07,286 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 165 selfloop transitions, 87 changer transitions 11/264 dead transitions. [2023-08-30 15:42:07,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 264 transitions, 3381 flow [2023-08-30 15:42:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 15:42:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 15:42:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2904 transitions. [2023-08-30 15:42:07,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31225806451612903 [2023-08-30 15:42:07,290 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2904 transitions. [2023-08-30 15:42:07,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2904 transitions. [2023-08-30 15:42:07,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:42:07,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2904 transitions. [2023-08-30 15:42:07,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 93.6774193548387) internal successors, (2904), 31 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:07,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 300.0) internal successors, (9600), 32 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:07,300 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 300.0) internal successors, (9600), 32 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:07,301 INFO L175 Difference]: Start difference. First operand has 136 places, 204 transitions, 2777 flow. Second operand 31 states and 2904 transitions. [2023-08-30 15:42:07,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 264 transitions, 3381 flow [2023-08-30 15:42:07,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 264 transitions, 3065 flow, removed 128 selfloop flow, removed 16 redundant places. [2023-08-30 15:42:07,399 INFO L231 Difference]: Finished difference. Result has 160 places, 188 transitions, 2545 flow [2023-08-30 15:42:07,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2545, PETRI_PLACES=160, PETRI_TRANSITIONS=188} [2023-08-30 15:42:07,399 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 129 predicate places. [2023-08-30 15:42:07,399 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 188 transitions, 2545 flow [2023-08-30 15:42:07,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.24137931034483) internal successors, (2617), 29 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:07,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:42:07,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:42:07,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-30 15:42:07,600 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 15:42:07,601 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:42:07,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:42:07,601 INFO L85 PathProgramCache]: Analyzing trace with hash 667395804, now seen corresponding path program 1 times [2023-08-30 15:42:07,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:42:07,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702948468] [2023-08-30 15:42:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:07,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:42:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:42:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:08,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:42:08,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702948468] [2023-08-30 15:42:08,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702948468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:42:08,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836483724] [2023-08-30 15:42:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:08,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:42:08,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:42:08,202 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 15:42:08,203 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 15:42:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:42:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 15:42:08,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:42:08,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 15:42:08,407 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 0 case distinctions, treesize of input 28 treesize of output 27 [2023-08-30 15:42:08,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:42:08,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 15:42:08,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:42:08,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-30 15:42:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:08,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:42:09,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:09,147 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 110 treesize of output 75 [2023-08-30 15:42:09,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:09,172 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 265 treesize of output 259 [2023-08-30 15:42:09,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:09,211 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 63 treesize of output 62 [2023-08-30 15:42:09,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:09,222 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 46 treesize of output 20 [2023-08-30 15:42:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:09,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836483724] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:42:09,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:42:09,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 15:42:09,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146034932] [2023-08-30 15:42:09,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:42:09,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:42:09,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:42:09,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:42:09,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=704, Unknown=9, NotChecked=0, Total=812 [2023-08-30 15:42:10,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:42:10,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 188 transitions, 2545 flow. Second operand has 29 states, 29 states have (on average 90.24137931034483) internal successors, (2617), 29 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:10,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:42:10,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:42:10,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:42:13,193 INFO L130 PetriNetUnfolder]: 1495/2912 cut-off events. [2023-08-30 15:42:13,193 INFO L131 PetriNetUnfolder]: For 38635/38649 co-relation queries the response was YES. [2023-08-30 15:42:13,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19905 conditions, 2912 events. 1495/2912 cut-off events. For 38635/38649 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19306 event pairs, 645 based on Foata normal form. 48/2874 useless extension candidates. Maximal degree in co-relation 19844. Up to 2290 conditions per place. [2023-08-30 15:42:13,211 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 147 selfloop transitions, 74 changer transitions 5/227 dead transitions. [2023-08-30 15:42:13,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 227 transitions, 3193 flow [2023-08-30 15:42:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 15:42:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 15:42:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1416 transitions. [2023-08-30 15:42:13,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31466666666666665 [2023-08-30 15:42:13,213 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1416 transitions. [2023-08-30 15:42:13,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1416 transitions. [2023-08-30 15:42:13,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:42:13,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1416 transitions. [2023-08-30 15:42:13,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 94.4) internal successors, (1416), 15 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:13,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 300.0) internal successors, (4800), 16 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:13,218 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 300.0) internal successors, (4800), 16 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:13,218 INFO L175 Difference]: Start difference. First operand has 160 places, 188 transitions, 2545 flow. Second operand 15 states and 1416 transitions. [2023-08-30 15:42:13,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 227 transitions, 3193 flow [2023-08-30 15:42:13,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 227 transitions, 2951 flow, removed 97 selfloop flow, removed 12 redundant places. [2023-08-30 15:42:13,359 INFO L231 Difference]: Finished difference. Result has 164 places, 192 transitions, 2585 flow [2023-08-30 15:42:13,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2585, PETRI_PLACES=164, PETRI_TRANSITIONS=192} [2023-08-30 15:42:13,360 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 133 predicate places. [2023-08-30 15:42:13,360 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 192 transitions, 2585 flow [2023-08-30 15:42:13,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.24137931034483) internal successors, (2617), 29 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:13,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:42:13,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:42:13,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-30 15:42:13,561 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 15:42:13,561 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:42:13,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:42:13,562 INFO L85 PathProgramCache]: Analyzing trace with hash 419810274, now seen corresponding path program 2 times [2023-08-30 15:42:13,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:42:13,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539445652] [2023-08-30 15:42:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:13,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:42:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:42:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:42:13,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539445652] [2023-08-30 15:42:13,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539445652] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:42:13,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165715443] [2023-08-30 15:42:13,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:42:13,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:42:13,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:42:13,908 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 15:42:13,910 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 15:42:14,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:42:14,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:42:14,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 15:42:14,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:42:14,089 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 15:42:14,120 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 15:42:14,174 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 15:42:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:14,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:42:16,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:16,593 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2023-08-30 15:42:16,605 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 15:42:16,606 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 308 treesize of output 279 [2023-08-30 15:42:16,619 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:42:16,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 80 [2023-08-30 15:42:16,635 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 15:42:16,636 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 93 treesize of output 67 [2023-08-30 15:42:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:16,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165715443] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:42:16,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:42:16,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-30 15:42:16,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026608451] [2023-08-30 15:42:16,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:42:16,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 15:42:16,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:42:16,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 15:42:16,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=500, Unknown=2, NotChecked=0, Total=600 [2023-08-30 15:42:18,897 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 15:42:21,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:42:23,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:42:23,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:42:23,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 192 transitions, 2585 flow. Second operand has 25 states, 25 states have (on average 90.44) internal successors, (2261), 25 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:23,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:42:23,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:42:23,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:42:24,802 INFO L130 PetriNetUnfolder]: 1327/2539 cut-off events. [2023-08-30 15:42:24,802 INFO L131 PetriNetUnfolder]: For 26535/26549 co-relation queries the response was YES. [2023-08-30 15:42:24,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16620 conditions, 2539 events. 1327/2539 cut-off events. For 26535/26549 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15970 event pairs, 644 based on Foata normal form. 40/2493 useless extension candidates. Maximal degree in co-relation 16559. Up to 2283 conditions per place. [2023-08-30 15:42:24,821 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 123 selfloop transitions, 40 changer transitions 7/171 dead transitions. [2023-08-30 15:42:24,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 171 transitions, 2392 flow [2023-08-30 15:42:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 15:42:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 15:42:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1308 transitions. [2023-08-30 15:42:24,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31142857142857144 [2023-08-30 15:42:24,823 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1308 transitions. [2023-08-30 15:42:24,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1308 transitions. [2023-08-30 15:42:24,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:42:24,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1308 transitions. [2023-08-30 15:42:24,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.42857142857143) internal successors, (1308), 14 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:24,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 300.0) internal successors, (4500), 15 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:24,829 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 300.0) internal successors, (4500), 15 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:24,829 INFO L175 Difference]: Start difference. First operand has 164 places, 192 transitions, 2585 flow. Second operand 14 states and 1308 transitions. [2023-08-30 15:42:24,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 171 transitions, 2392 flow [2023-08-30 15:42:24,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 171 transitions, 2211 flow, removed 50 selfloop flow, removed 16 redundant places. [2023-08-30 15:42:24,956 INFO L231 Difference]: Finished difference. Result has 158 places, 150 transitions, 1854 flow [2023-08-30 15:42:24,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1854, PETRI_PLACES=158, PETRI_TRANSITIONS=150} [2023-08-30 15:42:24,956 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 127 predicate places. [2023-08-30 15:42:24,956 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 150 transitions, 1854 flow [2023-08-30 15:42:24,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.44) internal successors, (2261), 25 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:24,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:42:24,957 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:42:24,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-30 15:42:25,157 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 15:42:25,158 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:42:25,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:42:25,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1029802873, now seen corresponding path program 2 times [2023-08-30 15:42:25,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:42:25,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800876438] [2023-08-30 15:42:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:25,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:42:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:42:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:25,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:42:25,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800876438] [2023-08-30 15:42:25,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800876438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:42:25,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438340013] [2023-08-30 15:42:25,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:42:25,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:42:25,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:42:25,599 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 15:42:25,609 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 15:42:25,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:42:25,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:42:25,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 15:42:25,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:42:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:42:25,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:42:25,873 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 15:42:25,873 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 15 [2023-08-30 15:42:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:42:25,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438340013] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:42:25,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:42:25,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 16 [2023-08-30 15:42:25,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621886312] [2023-08-30 15:42:25,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:42:25,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 15:42:25,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:42:25,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 15:42:25,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-08-30 15:42:26,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 15:42:26,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 150 transitions, 1854 flow. Second operand has 18 states, 18 states have (on average 114.72222222222223) internal successors, (2065), 18 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:26,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:42:26,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 15:42:26,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:42:27,113 INFO L130 PetriNetUnfolder]: 1608/3051 cut-off events. [2023-08-30 15:42:27,114 INFO L131 PetriNetUnfolder]: For 36936/36950 co-relation queries the response was YES. [2023-08-30 15:42:27,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20452 conditions, 3051 events. 1608/3051 cut-off events. For 36936/36950 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20110 event pairs, 233 based on Foata normal form. 140/3139 useless extension candidates. Maximal degree in co-relation 20398. Up to 997 conditions per place. [2023-08-30 15:42:27,134 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 94 selfloop transitions, 111 changer transitions 14/220 dead transitions. [2023-08-30 15:42:27,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 220 transitions, 2941 flow [2023-08-30 15:42:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 15:42:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 15:42:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2026 transitions. [2023-08-30 15:42:27,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39725490196078433 [2023-08-30 15:42:27,138 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2026 transitions. [2023-08-30 15:42:27,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2026 transitions. [2023-08-30 15:42:27,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:42:27,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2026 transitions. [2023-08-30 15:42:27,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 119.17647058823529) internal successors, (2026), 17 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:27,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 300.0) internal successors, (5400), 18 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:27,144 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 300.0) internal successors, (5400), 18 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:27,144 INFO L175 Difference]: Start difference. First operand has 158 places, 150 transitions, 1854 flow. Second operand 17 states and 2026 transitions. [2023-08-30 15:42:27,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 220 transitions, 2941 flow [2023-08-30 15:42:27,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 220 transitions, 2860 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-08-30 15:42:27,245 INFO L231 Difference]: Finished difference. Result has 160 places, 154 transitions, 2177 flow [2023-08-30 15:42:27,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2177, PETRI_PLACES=160, PETRI_TRANSITIONS=154} [2023-08-30 15:42:27,246 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 129 predicate places. [2023-08-30 15:42:27,246 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 154 transitions, 2177 flow [2023-08-30 15:42:27,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.72222222222223) internal successors, (2065), 18 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:27,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:42:27,246 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:42:27,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-30 15:42:27,446 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 15:42:27,447 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:42:27,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:42:27,447 INFO L85 PathProgramCache]: Analyzing trace with hash -124527854, now seen corresponding path program 3 times [2023-08-30 15:42:27,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:42:27,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898457613] [2023-08-30 15:42:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:27,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:42:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:42:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:27,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:42:27,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898457613] [2023-08-30 15:42:27,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898457613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:42:27,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268554134] [2023-08-30 15:42:27,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:42:27,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:42:27,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:42:27,932 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 15:42:27,935 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 15:42:28,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:42:28,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:42:28,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 15:42:28,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:42:28,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:42:28,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 15:42:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:42:28,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:42:28,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:28,257 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 44 treesize of output 37 [2023-08-30 15:42:28,263 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 10 treesize of output 3 [2023-08-30 15:42:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:42:28,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268554134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:42:28,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:42:28,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2023-08-30 15:42:28,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843352491] [2023-08-30 15:42:28,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:42:28,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 15:42:28,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:42:28,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 15:42:28,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=437, Unknown=4, NotChecked=0, Total=506 [2023-08-30 15:42:29,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-08-30 15:42:29,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 154 transitions, 2177 flow. Second operand has 23 states, 23 states have (on average 93.52173913043478) internal successors, (2151), 23 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:29,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:42:29,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-08-30 15:42:29,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:42:29,862 INFO L130 PetriNetUnfolder]: 1521/2907 cut-off events. [2023-08-30 15:42:29,862 INFO L131 PetriNetUnfolder]: For 38830/38837 co-relation queries the response was YES. [2023-08-30 15:42:29,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20553 conditions, 2907 events. 1521/2907 cut-off events. For 38830/38837 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19091 event pairs, 391 based on Foata normal form. 57/2912 useless extension candidates. Maximal degree in co-relation 20500. Up to 1791 conditions per place. [2023-08-30 15:42:29,879 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 99 selfloop transitions, 83 changer transitions 9/192 dead transitions. [2023-08-30 15:42:29,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 192 transitions, 2723 flow [2023-08-30 15:42:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:42:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:42:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1561 transitions. [2023-08-30 15:42:29,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3252083333333333 [2023-08-30 15:42:29,881 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1561 transitions. [2023-08-30 15:42:29,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1561 transitions. [2023-08-30 15:42:29,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:42:29,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1561 transitions. [2023-08-30 15:42:29,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 97.5625) internal successors, (1561), 16 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:29,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 300.0) internal successors, (5100), 17 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:29,887 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 300.0) internal successors, (5100), 17 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:29,887 INFO L175 Difference]: Start difference. First operand has 160 places, 154 transitions, 2177 flow. Second operand 16 states and 1561 transitions. [2023-08-30 15:42:29,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 192 transitions, 2723 flow [2023-08-30 15:42:30,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 192 transitions, 2390 flow, removed 87 selfloop flow, removed 12 redundant places. [2023-08-30 15:42:30,019 INFO L231 Difference]: Finished difference. Result has 158 places, 147 transitions, 1957 flow [2023-08-30 15:42:30,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1957, PETRI_PLACES=158, PETRI_TRANSITIONS=147} [2023-08-30 15:42:30,020 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 127 predicate places. [2023-08-30 15:42:30,020 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 147 transitions, 1957 flow [2023-08-30 15:42:30,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 93.52173913043478) internal successors, (2151), 23 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:30,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:42:30,020 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:42:30,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-30 15:42:30,221 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 15:42:30,221 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:42:30,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:42:30,222 INFO L85 PathProgramCache]: Analyzing trace with hash 648459223, now seen corresponding path program 3 times [2023-08-30 15:42:30,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:42:30,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101495487] [2023-08-30 15:42:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:30,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:42:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:42:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:31,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:42:31,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101495487] [2023-08-30 15:42:31,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101495487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:42:31,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347534939] [2023-08-30 15:42:31,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:42:31,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:42:31,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:42:31,212 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 15:42:31,215 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 15:42:31,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:42:31,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:42:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 15:42:31,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:42:31,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:42:31,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-30 15:42:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:42:31,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:42:31,729 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1088 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1088) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) 2147483648)) is different from false [2023-08-30 15:42:31,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:31,782 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 75 treesize of output 77 [2023-08-30 15:42:31,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:31,787 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 18 treesize of output 5 [2023-08-30 15:42:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:42:31,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347534939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:42:31,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:42:31,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2023-08-30 15:42:31,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475628428] [2023-08-30 15:42:31,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:42:31,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 15:42:31,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:42:31,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 15:42:31,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=527, Unknown=1, NotChecked=46, Total=650 [2023-08-30 15:42:31,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-08-30 15:42:31,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 147 transitions, 1957 flow. Second operand has 26 states, 26 states have (on average 93.34615384615384) internal successors, (2427), 26 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:31,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:42:31,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-08-30 15:42:31,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:42:33,671 INFO L130 PetriNetUnfolder]: 1663/3149 cut-off events. [2023-08-30 15:42:33,671 INFO L131 PetriNetUnfolder]: For 26687/26689 co-relation queries the response was YES. [2023-08-30 15:42:33,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20081 conditions, 3149 events. 1663/3149 cut-off events. For 26687/26689 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20877 event pairs, 91 based on Foata normal form. 94/3193 useless extension candidates. Maximal degree in co-relation 20029. Up to 1122 conditions per place. [2023-08-30 15:42:33,691 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 128 selfloop transitions, 123 changer transitions 14/266 dead transitions. [2023-08-30 15:42:33,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 266 transitions, 3484 flow [2023-08-30 15:42:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 15:42:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 15:42:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2634 transitions. [2023-08-30 15:42:33,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3251851851851852 [2023-08-30 15:42:33,694 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2634 transitions. [2023-08-30 15:42:33,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2634 transitions. [2023-08-30 15:42:33,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:42:33,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2634 transitions. [2023-08-30 15:42:33,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 97.55555555555556) internal successors, (2634), 27 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:33,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 300.0) internal successors, (8400), 28 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:33,702 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 300.0) internal successors, (8400), 28 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:33,703 INFO L175 Difference]: Start difference. First operand has 158 places, 147 transitions, 1957 flow. Second operand 27 states and 2634 transitions. [2023-08-30 15:42:33,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 266 transitions, 3484 flow [2023-08-30 15:42:33,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 266 transitions, 3290 flow, removed 29 selfloop flow, removed 10 redundant places. [2023-08-30 15:42:33,792 INFO L231 Difference]: Finished difference. Result has 174 places, 164 transitions, 2271 flow [2023-08-30 15:42:33,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2271, PETRI_PLACES=174, PETRI_TRANSITIONS=164} [2023-08-30 15:42:33,793 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 143 predicate places. [2023-08-30 15:42:33,793 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 164 transitions, 2271 flow [2023-08-30 15:42:33,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 93.34615384615384) internal successors, (2427), 26 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:33,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:42:33,793 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:42:33,799 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 15:42:33,994 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 15:42:33,994 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:42:33,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:42:33,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1819023911, now seen corresponding path program 4 times [2023-08-30 15:42:33,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:42:33,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554116496] [2023-08-30 15:42:33,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:33,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:42:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:42:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:34,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:42:34,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554116496] [2023-08-30 15:42:34,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554116496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:42:34,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265736834] [2023-08-30 15:42:34,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:42:34,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:42:34,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:42:34,489 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 15:42:34,491 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 15:42:34,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:42:34,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:42:34,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 15:42:34,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:42:34,698 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 15:42:34,743 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 15:42:34,779 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 15:42:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:34,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:42:35,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:35,356 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 120 treesize of output 84 [2023-08-30 15:42:35,387 INFO L321 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-30 15:42:35,387 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 254 treesize of output 243 [2023-08-30 15:42:35,418 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-30 15:42:35,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 220 treesize of output 188 [2023-08-30 15:42:35,449 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-30 15:42:35,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 143 treesize of output 137 [2023-08-30 15:42:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:35,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265736834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:42:35,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:42:35,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-30 15:42:35,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031910968] [2023-08-30 15:42:35,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:42:35,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 15:42:35,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:42:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 15:42:35,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=597, Unknown=2, NotChecked=0, Total=756 [2023-08-30 15:42:36,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:42:36,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 164 transitions, 2271 flow. Second operand has 28 states, 28 states have (on average 90.28571428571429) internal successors, (2528), 28 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:36,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:42:36,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:42:36,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:42:38,102 INFO L130 PetriNetUnfolder]: 1944/3561 cut-off events. [2023-08-30 15:42:38,102 INFO L131 PetriNetUnfolder]: For 34093/34095 co-relation queries the response was YES. [2023-08-30 15:42:38,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24000 conditions, 3561 events. 1944/3561 cut-off events. For 34093/34095 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23379 event pairs, 536 based on Foata normal form. 46/3557 useless extension candidates. Maximal degree in co-relation 23945. Up to 3050 conditions per place. [2023-08-30 15:42:38,125 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 175 selfloop transitions, 84 changer transitions 9/269 dead transitions. [2023-08-30 15:42:38,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 269 transitions, 3760 flow [2023-08-30 15:42:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 15:42:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 15:42:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2787 transitions. [2023-08-30 15:42:38,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30966666666666665 [2023-08-30 15:42:38,132 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2787 transitions. [2023-08-30 15:42:38,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2787 transitions. [2023-08-30 15:42:38,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:42:38,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2787 transitions. [2023-08-30 15:42:38,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 92.9) internal successors, (2787), 30 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:38,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 300.0) internal successors, (9300), 31 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:38,142 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 300.0) internal successors, (9300), 31 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:38,143 INFO L175 Difference]: Start difference. First operand has 174 places, 164 transitions, 2271 flow. Second operand 30 states and 2787 transitions. [2023-08-30 15:42:38,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 269 transitions, 3760 flow [2023-08-30 15:42:38,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 269 transitions, 3343 flow, removed 115 selfloop flow, removed 18 redundant places. [2023-08-30 15:42:38,247 INFO L231 Difference]: Finished difference. Result has 185 places, 211 transitions, 2778 flow [2023-08-30 15:42:38,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2778, PETRI_PLACES=185, PETRI_TRANSITIONS=211} [2023-08-30 15:42:38,248 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 154 predicate places. [2023-08-30 15:42:38,248 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 211 transitions, 2778 flow [2023-08-30 15:42:38,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.28571428571429) internal successors, (2528), 28 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:38,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:42:38,249 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:42:38,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-30 15:42:38,453 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 15:42:38,453 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:42:38,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:42:38,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1836348468, now seen corresponding path program 3 times [2023-08-30 15:42:38,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:42:38,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110331304] [2023-08-30 15:42:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:38,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:42:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:42:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:39,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:42:39,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110331304] [2023-08-30 15:42:39,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110331304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:42:39,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321882909] [2023-08-30 15:42:39,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:42:39,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:42:39,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:42:39,278 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 15:42:39,280 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 15:42:39,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:42:39,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:42:39,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:42:39,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:42:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:42:39,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:42:39,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:39,520 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 19 [2023-08-30 15:42:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:42:39,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321882909] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:42:39,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:42:39,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 16 [2023-08-30 15:42:39,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717322454] [2023-08-30 15:42:39,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:42:39,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 15:42:39,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:42:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 15:42:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-08-30 15:42:40,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 300 [2023-08-30 15:42:40,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 211 transitions, 2778 flow. Second operand has 18 states, 18 states have (on average 109.5) internal successors, (1971), 18 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:40,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:42:40,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 300 [2023-08-30 15:42:40,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:42:41,411 INFO L130 PetriNetUnfolder]: 1667/3050 cut-off events. [2023-08-30 15:42:41,411 INFO L131 PetriNetUnfolder]: For 28405/28406 co-relation queries the response was YES. [2023-08-30 15:42:41,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20428 conditions, 3050 events. 1667/3050 cut-off events. For 28405/28406 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19366 event pairs, 334 based on Foata normal form. 156/3172 useless extension candidates. Maximal degree in co-relation 20372. Up to 1820 conditions per place. [2023-08-30 15:42:41,430 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 139 selfloop transitions, 131 changer transitions 1/272 dead transitions. [2023-08-30 15:42:41,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 272 transitions, 3822 flow [2023-08-30 15:42:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:42:41,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:42:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2266 transitions. [2023-08-30 15:42:41,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37766666666666665 [2023-08-30 15:42:41,432 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2266 transitions. [2023-08-30 15:42:41,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2266 transitions. [2023-08-30 15:42:41,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:42:41,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2266 transitions. [2023-08-30 15:42:41,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 113.3) internal successors, (2266), 20 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:41,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 300.0) internal successors, (6300), 21 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:41,437 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 300.0) internal successors, (6300), 21 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:41,437 INFO L175 Difference]: Start difference. First operand has 185 places, 211 transitions, 2778 flow. Second operand 20 states and 2266 transitions. [2023-08-30 15:42:41,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 272 transitions, 3822 flow [2023-08-30 15:42:41,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 272 transitions, 3436 flow, removed 131 selfloop flow, removed 14 redundant places. [2023-08-30 15:42:41,523 INFO L231 Difference]: Finished difference. Result has 185 places, 224 transitions, 2871 flow [2023-08-30 15:42:41,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2871, PETRI_PLACES=185, PETRI_TRANSITIONS=224} [2023-08-30 15:42:41,524 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 154 predicate places. [2023-08-30 15:42:41,524 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 224 transitions, 2871 flow [2023-08-30 15:42:41,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 109.5) internal successors, (1971), 18 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:41,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:42:41,524 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:42:41,529 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 15:42:41,725 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 15:42:41,725 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:42:41,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:42:41,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1836349252, now seen corresponding path program 4 times [2023-08-30 15:42:41,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:42:41,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974722884] [2023-08-30 15:42:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:41,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:42:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:42:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:42,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:42:42,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974722884] [2023-08-30 15:42:42,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974722884] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:42:42,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071830048] [2023-08-30 15:42:42,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:42:42,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:42:42,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:42:42,110 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 15:42:42,111 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 15:42:42,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:42:42,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:42:42,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 15:42:42,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:42:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:42:42,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:42:42,491 INFO L321 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-30 15:42:42,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2023-08-30 15:42:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:42:42,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071830048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:42:42,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:42:42,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 19 [2023-08-30 15:42:42,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102987333] [2023-08-30 15:42:42,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:42:42,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 15:42:42,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:42:42,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 15:42:42,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-08-30 15:42:43,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 15:42:43,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 224 transitions, 2871 flow. Second operand has 21 states, 21 states have (on average 114.52380952380952) internal successors, (2405), 21 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:43,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:42:43,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 15:42:43,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:42:44,576 INFO L130 PetriNetUnfolder]: 1717/3175 cut-off events. [2023-08-30 15:42:44,576 INFO L131 PetriNetUnfolder]: For 26338/26339 co-relation queries the response was YES. [2023-08-30 15:42:44,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20619 conditions, 3175 events. 1717/3175 cut-off events. For 26338/26339 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20677 event pairs, 337 based on Foata normal form. 76/3235 useless extension candidates. Maximal degree in co-relation 20566. Up to 2284 conditions per place. [2023-08-30 15:42:44,596 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 178 selfloop transitions, 181 changer transitions 21/381 dead transitions. [2023-08-30 15:42:44,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 381 transitions, 5147 flow [2023-08-30 15:42:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 15:42:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 15:42:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4116 transitions. [2023-08-30 15:42:44,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.392 [2023-08-30 15:42:44,599 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4116 transitions. [2023-08-30 15:42:44,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4116 transitions. [2023-08-30 15:42:44,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:42:44,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4116 transitions. [2023-08-30 15:42:44,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 117.6) internal successors, (4116), 35 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:44,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 300.0) internal successors, (10800), 36 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:44,610 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 300.0) internal successors, (10800), 36 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:44,610 INFO L175 Difference]: Start difference. First operand has 185 places, 224 transitions, 2871 flow. Second operand 35 states and 4116 transitions. [2023-08-30 15:42:44,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 381 transitions, 5147 flow [2023-08-30 15:42:44,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 381 transitions, 5003 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-08-30 15:42:44,706 INFO L231 Difference]: Finished difference. Result has 220 places, 298 transitions, 4476 flow [2023-08-30 15:42:44,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4476, PETRI_PLACES=220, PETRI_TRANSITIONS=298} [2023-08-30 15:42:44,707 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 189 predicate places. [2023-08-30 15:42:44,707 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 298 transitions, 4476 flow [2023-08-30 15:42:44,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 114.52380952380952) internal successors, (2405), 21 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:44,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:42:44,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:42:44,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-30 15:42:44,912 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 15:42:44,913 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:42:44,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:42:44,913 INFO L85 PathProgramCache]: Analyzing trace with hash -783200165, now seen corresponding path program 5 times [2023-08-30 15:42:44,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:42:44,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845948689] [2023-08-30 15:42:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:44,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:42:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:42:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:45,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:42:45,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845948689] [2023-08-30 15:42:45,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845948689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:42:45,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602246436] [2023-08-30 15:42:45,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:42:45,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:42:45,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:42:45,381 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 15:42:45,407 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 15:42:45,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:42:45,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:42:45,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:42:45,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:42:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:42:45,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:42:45,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:45,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2023-08-30 15:42:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:42:45,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602246436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:42:45,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:42:45,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 18 [2023-08-30 15:42:45,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372802783] [2023-08-30 15:42:45,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:42:45,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:42:45,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:42:45,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:42:45,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-08-30 15:42:46,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 15:42:46,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 298 transitions, 4476 flow. Second operand has 20 states, 20 states have (on average 114.5) internal successors, (2290), 20 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:46,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:42:46,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 15:42:46,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:42:47,290 INFO L130 PetriNetUnfolder]: 1726/3134 cut-off events. [2023-08-30 15:42:47,290 INFO L131 PetriNetUnfolder]: For 38413/38414 co-relation queries the response was YES. [2023-08-30 15:42:47,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22420 conditions, 3134 events. 1726/3134 cut-off events. For 38413/38414 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19708 event pairs, 414 based on Foata normal form. 110/3236 useless extension candidates. Maximal degree in co-relation 22357. Up to 2049 conditions per place. [2023-08-30 15:42:47,311 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 197 selfloop transitions, 122 changer transitions 16/336 dead transitions. [2023-08-30 15:42:47,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 5472 flow [2023-08-30 15:42:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 15:42:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 15:42:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2462 transitions. [2023-08-30 15:42:47,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907936507936508 [2023-08-30 15:42:47,313 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2462 transitions. [2023-08-30 15:42:47,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2462 transitions. [2023-08-30 15:42:47,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:42:47,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2462 transitions. [2023-08-30 15:42:47,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 117.23809523809524) internal successors, (2462), 21 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:47,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 300.0) internal successors, (6600), 22 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:47,318 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 300.0) internal successors, (6600), 22 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:47,319 INFO L175 Difference]: Start difference. First operand has 220 places, 298 transitions, 4476 flow. Second operand 21 states and 2462 transitions. [2023-08-30 15:42:47,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 5472 flow [2023-08-30 15:42:47,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 336 transitions, 5156 flow, removed 106 selfloop flow, removed 20 redundant places. [2023-08-30 15:42:47,428 INFO L231 Difference]: Finished difference. Result has 214 places, 286 transitions, 4451 flow [2023-08-30 15:42:47,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=3988, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4451, PETRI_PLACES=214, PETRI_TRANSITIONS=286} [2023-08-30 15:42:47,429 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 183 predicate places. [2023-08-30 15:42:47,429 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 286 transitions, 4451 flow [2023-08-30 15:42:47,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 114.5) internal successors, (2290), 20 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:47,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:42:47,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:42:47,434 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 15:42:47,630 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 15:42:47,631 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:42:47,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:42:47,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1440382828, now seen corresponding path program 4 times [2023-08-30 15:42:47,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:42:47,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365869558] [2023-08-30 15:42:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:47,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:42:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:42:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:47,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:42:47,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365869558] [2023-08-30 15:42:47,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365869558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:42:47,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873323093] [2023-08-30 15:42:47,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:42:47,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:42:47,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:42:47,989 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 15:42:48,013 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 15:42:48,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:42:48,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:42:48,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 15:42:48,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:42:48,162 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 15:42:48,206 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 15:42:48,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:42:48,252 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 15:42:48,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:42:48,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2023-08-30 15:42:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:48,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:42:48,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:48,798 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 112 treesize of output 77 [2023-08-30 15:42:48,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:48,820 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 157 treesize of output 169 [2023-08-30 15:42:48,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 67 [2023-08-30 15:42:48,843 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:48,843 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 65 treesize of output 63 [2023-08-30 15:42:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:49,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873323093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:42:49,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:42:49,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-30 15:42:49,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692068846] [2023-08-30 15:42:49,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:42:49,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 15:42:49,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:42:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 15:42:49,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=658, Unknown=3, NotChecked=0, Total=756 [2023-08-30 15:42:50,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:42:50,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 286 transitions, 4451 flow. Second operand has 28 states, 28 states have (on average 90.28571428571429) internal successors, (2528), 28 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:50,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:42:50,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:42:50,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:42:53,359 INFO L130 PetriNetUnfolder]: 1749/3185 cut-off events. [2023-08-30 15:42:53,360 INFO L131 PetriNetUnfolder]: For 35156/35156 co-relation queries the response was YES. [2023-08-30 15:42:53,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22638 conditions, 3185 events. 1749/3185 cut-off events. For 35156/35156 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20275 event pairs, 683 based on Foata normal form. 24/3201 useless extension candidates. Maximal degree in co-relation 22574. Up to 2868 conditions per place. [2023-08-30 15:42:53,382 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 298 selfloop transitions, 39 changer transitions 14/352 dead transitions. [2023-08-30 15:42:53,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 352 transitions, 5627 flow [2023-08-30 15:42:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 15:42:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 15:42:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2423 transitions. [2023-08-30 15:42:53,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31064102564102564 [2023-08-30 15:42:53,385 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2423 transitions. [2023-08-30 15:42:53,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2423 transitions. [2023-08-30 15:42:53,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:42:53,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2423 transitions. [2023-08-30 15:42:53,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 93.1923076923077) internal successors, (2423), 26 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:53,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 300.0) internal successors, (8100), 27 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:53,394 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 300.0) internal successors, (8100), 27 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:53,394 INFO L175 Difference]: Start difference. First operand has 214 places, 286 transitions, 4451 flow. Second operand 26 states and 2423 transitions. [2023-08-30 15:42:53,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 352 transitions, 5627 flow [2023-08-30 15:42:53,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 352 transitions, 5500 flow, removed 33 selfloop flow, removed 17 redundant places. [2023-08-30 15:42:53,539 INFO L231 Difference]: Finished difference. Result has 215 places, 292 transitions, 4531 flow [2023-08-30 15:42:53,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=4292, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4531, PETRI_PLACES=215, PETRI_TRANSITIONS=292} [2023-08-30 15:42:53,540 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 184 predicate places. [2023-08-30 15:42:53,540 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 292 transitions, 4531 flow [2023-08-30 15:42:53,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.28571428571429) internal successors, (2528), 28 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:53,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:42:53,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:42:53,545 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 15:42:53,741 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 15:42:53,741 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:42:53,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:42:53,741 INFO L85 PathProgramCache]: Analyzing trace with hash 419811111, now seen corresponding path program 6 times [2023-08-30 15:42:53,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:42:53,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583238326] [2023-08-30 15:42:53,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:53,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:42:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:42:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:42:54,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:42:54,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583238326] [2023-08-30 15:42:54,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583238326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:42:54,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945460392] [2023-08-30 15:42:54,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:42:54,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:42:54,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:42:54,373 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 15:42:54,375 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 15:42:54,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 15:42:54,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:42:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 15:42:54,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:42:54,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:42:54,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 15:42:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:42:54,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:42:54,776 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1311 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1311) c_~q~0.base))) (or (< (let ((.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))) 2147483648) (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1))))) is different from false [2023-08-30 15:42:54,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:54,796 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 96 treesize of output 98 [2023-08-30 15:42:54,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:42:54,809 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 48 treesize of output 46 [2023-08-30 15:42:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:42:54,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945460392] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:42:54,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:42:54,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2023-08-30 15:42:54,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955480643] [2023-08-30 15:42:54,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:42:54,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 15:42:54,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:42:54,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 15:42:54,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=530, Unknown=1, NotChecked=46, Total=650 [2023-08-30 15:42:55,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-08-30 15:42:55,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 292 transitions, 4531 flow. Second operand has 26 states, 26 states have (on average 93.34615384615384) internal successors, (2427), 26 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:55,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:42:55,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-08-30 15:42:55,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:42:59,035 INFO L130 PetriNetUnfolder]: 1958/3542 cut-off events. [2023-08-30 15:42:59,035 INFO L131 PetriNetUnfolder]: For 50142/50142 co-relation queries the response was YES. [2023-08-30 15:42:59,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26493 conditions, 3542 events. 1958/3542 cut-off events. For 50142/50142 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 22626 event pairs, 203 based on Foata normal form. 124/3658 useless extension candidates. Maximal degree in co-relation 26436. Up to 2068 conditions per place. [2023-08-30 15:42:59,062 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 164 selfloop transitions, 273 changer transitions 22/460 dead transitions. [2023-08-30 15:42:59,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 460 transitions, 7764 flow [2023-08-30 15:42:59,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 15:42:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 15:42:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3170 transitions. [2023-08-30 15:42:59,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3202020202020202 [2023-08-30 15:42:59,065 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3170 transitions. [2023-08-30 15:42:59,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3170 transitions. [2023-08-30 15:42:59,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:42:59,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3170 transitions. [2023-08-30 15:42:59,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 96.06060606060606) internal successors, (3170), 33 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:59,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 300.0) internal successors, (10200), 34 states have internal predecessors, (10200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:59,073 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 300.0) internal successors, (10200), 34 states have internal predecessors, (10200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:59,073 INFO L175 Difference]: Start difference. First operand has 215 places, 292 transitions, 4531 flow. Second operand 33 states and 3170 transitions. [2023-08-30 15:42:59,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 460 transitions, 7764 flow [2023-08-30 15:42:59,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 460 transitions, 7557 flow, removed 83 selfloop flow, removed 14 redundant places. [2023-08-30 15:42:59,207 INFO L231 Difference]: Finished difference. Result has 232 places, 387 transitions, 6865 flow [2023-08-30 15:42:59,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=4275, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6865, PETRI_PLACES=232, PETRI_TRANSITIONS=387} [2023-08-30 15:42:59,207 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 201 predicate places. [2023-08-30 15:42:59,208 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 387 transitions, 6865 flow [2023-08-30 15:42:59,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 93.34615384615384) internal successors, (2427), 26 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:42:59,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:42:59,208 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:42:59,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-30 15:42:59,412 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 15:42:59,412 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:42:59,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:42:59,413 INFO L85 PathProgramCache]: Analyzing trace with hash -124527907, now seen corresponding path program 3 times [2023-08-30 15:42:59,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:42:59,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438881749] [2023-08-30 15:42:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:42:59,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:42:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:43:00,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:00,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438881749] [2023-08-30 15:43:00,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438881749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:00,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010612] [2023-08-30 15:43:00,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:43:00,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:00,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:00,215 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 15:43:00,216 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 15:43:00,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:43:00,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:43:00,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 15:43:00,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:00,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:43:00,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 15:43:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:43:00,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:00,498 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1350 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1350) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 1))) is different from false [2023-08-30 15:43:00,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:43:00,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2023-08-30 15:43:00,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2023-08-30 15:43:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:43:00,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:43:00,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:43:00,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 22 [2023-08-30 15:43:00,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507171126] [2023-08-30 15:43:00,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:43:00,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 15:43:00,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:00,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 15:43:00,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=443, Unknown=1, NotChecked=42, Total=552 [2023-08-30 15:43:00,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:43:00,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 387 transitions, 6865 flow. Second operand has 24 states, 24 states have (on average 90.45833333333333) internal successors, (2171), 24 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:00,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:00,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:43:00,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:02,272 INFO L130 PetriNetUnfolder]: 1939/3474 cut-off events. [2023-08-30 15:43:02,272 INFO L131 PetriNetUnfolder]: For 55384/55384 co-relation queries the response was YES. [2023-08-30 15:43:02,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28800 conditions, 3474 events. 1939/3474 cut-off events. For 55384/55384 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21938 event pairs, 102 based on Foata normal form. 8/3474 useless extension candidates. Maximal degree in co-relation 28734. Up to 1215 conditions per place. [2023-08-30 15:43:02,298 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 171 selfloop transitions, 282 changer transitions 23/477 dead transitions. [2023-08-30 15:43:02,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 477 transitions, 8831 flow [2023-08-30 15:43:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 15:43:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 15:43:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2077 transitions. [2023-08-30 15:43:02,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3146969696969697 [2023-08-30 15:43:02,300 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2077 transitions. [2023-08-30 15:43:02,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2077 transitions. [2023-08-30 15:43:02,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:02,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2077 transitions. [2023-08-30 15:43:02,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 94.4090909090909) internal successors, (2077), 22 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:02,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 300.0) internal successors, (6900), 23 states have internal predecessors, (6900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:02,305 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 300.0) internal successors, (6900), 23 states have internal predecessors, (6900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:02,305 INFO L175 Difference]: Start difference. First operand has 232 places, 387 transitions, 6865 flow. Second operand 22 states and 2077 transitions. [2023-08-30 15:43:02,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 477 transitions, 8831 flow [2023-08-30 15:43:02,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 477 transitions, 7951 flow, removed 307 selfloop flow, removed 19 redundant places. [2023-08-30 15:43:02,502 INFO L231 Difference]: Finished difference. Result has 228 places, 377 transitions, 6498 flow [2023-08-30 15:43:02,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6498, PETRI_PLACES=228, PETRI_TRANSITIONS=377} [2023-08-30 15:43:02,502 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 197 predicate places. [2023-08-30 15:43:02,502 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 377 transitions, 6498 flow [2023-08-30 15:43:02,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.45833333333333) internal successors, (2171), 24 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:02,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:02,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:02,510 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 15:43:02,703 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 15:43:02,703 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:43:02,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:02,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1702197031, now seen corresponding path program 7 times [2023-08-30 15:43:02,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:02,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514169464] [2023-08-30 15:43:02,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:02,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:43:02,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:02,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514169464] [2023-08-30 15:43:02,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514169464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:02,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904250725] [2023-08-30 15:43:02,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:43:02,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:02,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:02,778 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 15:43:02,804 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 15:43:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:02,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:43:02,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:43:02,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:43:03,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904250725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:43:03,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:43:03,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 18 [2023-08-30 15:43:03,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553307442] [2023-08-30 15:43:03,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:43:03,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:43:03,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:43:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-08-30 15:43:03,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 15:43:03,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 377 transitions, 6498 flow. Second operand has 20 states, 20 states have (on average 121.9) internal successors, (2438), 20 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:03,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:03,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 15:43:03,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:04,039 INFO L130 PetriNetUnfolder]: 2268/4094 cut-off events. [2023-08-30 15:43:04,039 INFO L131 PetriNetUnfolder]: For 63378/63378 co-relation queries the response was YES. [2023-08-30 15:43:04,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32707 conditions, 4094 events. 2268/4094 cut-off events. For 63378/63378 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 26890 event pairs, 272 based on Foata normal form. 112/4202 useless extension candidates. Maximal degree in co-relation 32645. Up to 2626 conditions per place. [2023-08-30 15:43:04,072 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 221 selfloop transitions, 239 changer transitions 12/473 dead transitions. [2023-08-30 15:43:04,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 473 transitions, 8844 flow [2023-08-30 15:43:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 15:43:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 15:43:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1625 transitions. [2023-08-30 15:43:04,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-30 15:43:04,074 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1625 transitions. [2023-08-30 15:43:04,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1625 transitions. [2023-08-30 15:43:04,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:04,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1625 transitions. [2023-08-30 15:43:04,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 125.0) internal successors, (1625), 13 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:04,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 300.0) internal successors, (4200), 14 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:04,079 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 300.0) internal successors, (4200), 14 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:04,079 INFO L175 Difference]: Start difference. First operand has 228 places, 377 transitions, 6498 flow. Second operand 13 states and 1625 transitions. [2023-08-30 15:43:04,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 473 transitions, 8844 flow [2023-08-30 15:43:04,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 473 transitions, 8179 flow, removed 85 selfloop flow, removed 21 redundant places. [2023-08-30 15:43:04,311 INFO L231 Difference]: Finished difference. Result has 213 places, 445 transitions, 8117 flow [2023-08-30 15:43:04,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=5913, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8117, PETRI_PLACES=213, PETRI_TRANSITIONS=445} [2023-08-30 15:43:04,311 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 182 predicate places. [2023-08-30 15:43:04,311 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 445 transitions, 8117 flow [2023-08-30 15:43:04,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 121.9) internal successors, (2438), 20 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:04,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:04,312 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:04,317 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 15:43:04,512 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 15:43:04,512 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:43:04,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:04,513 INFO L85 PathProgramCache]: Analyzing trace with hash 848076431, now seen corresponding path program 8 times [2023-08-30 15:43:04,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:04,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191810669] [2023-08-30 15:43:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:04,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:05,712 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 15:43:05,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:05,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191810669] [2023-08-30 15:43:05,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191810669] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:05,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643938870] [2023-08-30 15:43:05,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:43:05,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:05,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:05,714 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 15:43:05,716 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 15:43:05,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:43:05,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:43:05,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 15:43:05,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:05,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:43:05,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 15:43:06,093 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 15:43:06,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:06,228 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1427 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1427) c_~q~0.base))) (or (< (let ((.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))) 2147483648) (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1))))) is different from false [2023-08-30 15:43:06,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:43:06,249 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 96 treesize of output 98 [2023-08-30 15:43:06,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:43:06,262 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 48 treesize of output 46 [2023-08-30 15:43:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:43:06,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643938870] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:43:06,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:43:06,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 28 [2023-08-30 15:43:06,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447642653] [2023-08-30 15:43:06,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:43:06,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 15:43:06,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 15:43:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=725, Unknown=1, NotChecked=54, Total=870 [2023-08-30 15:43:06,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-08-30 15:43:06,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 445 transitions, 8117 flow. Second operand has 30 states, 30 states have (on average 93.3) internal successors, (2799), 30 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:06,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:06,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-08-30 15:43:06,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:08,873 INFO L130 PetriNetUnfolder]: 2628/4729 cut-off events. [2023-08-30 15:43:08,873 INFO L131 PetriNetUnfolder]: For 69749/69749 co-relation queries the response was YES. [2023-08-30 15:43:08,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38722 conditions, 4729 events. 2628/4729 cut-off events. For 69749/69749 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32133 event pairs, 253 based on Foata normal form. 44/4677 useless extension candidates. Maximal degree in co-relation 38661. Up to 3071 conditions per place. [2023-08-30 15:43:08,902 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 331 selfloop transitions, 332 changer transitions 1/665 dead transitions. [2023-08-30 15:43:08,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 665 transitions, 12620 flow [2023-08-30 15:43:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 15:43:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 15:43:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3104 transitions. [2023-08-30 15:43:08,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3233333333333333 [2023-08-30 15:43:08,906 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3104 transitions. [2023-08-30 15:43:08,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3104 transitions. [2023-08-30 15:43:08,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:08,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3104 transitions. [2023-08-30 15:43:08,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 97.0) internal successors, (3104), 32 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:08,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 300.0) internal successors, (9900), 33 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:08,916 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 300.0) internal successors, (9900), 33 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:08,916 INFO L175 Difference]: Start difference. First operand has 213 places, 445 transitions, 8117 flow. Second operand 32 states and 3104 transitions. [2023-08-30 15:43:08,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 665 transitions, 12620 flow [2023-08-30 15:43:09,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 665 transitions, 11669 flow, removed 470 selfloop flow, removed 7 redundant places. [2023-08-30 15:43:09,227 INFO L231 Difference]: Finished difference. Result has 232 places, 532 transitions, 10052 flow [2023-08-30 15:43:09,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=7622, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10052, PETRI_PLACES=232, PETRI_TRANSITIONS=532} [2023-08-30 15:43:09,228 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 201 predicate places. [2023-08-30 15:43:09,228 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 532 transitions, 10052 flow [2023-08-30 15:43:09,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 93.3) internal successors, (2799), 30 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:09,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:09,229 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:09,238 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 15:43:09,435 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 15:43:09,435 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:43:09,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:09,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1868629548, now seen corresponding path program 5 times [2023-08-30 15:43:09,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:09,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828798767] [2023-08-30 15:43:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:09,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:10,061 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 15:43:10,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:10,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828798767] [2023-08-30 15:43:10,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828798767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:10,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663996445] [2023-08-30 15:43:10,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:43:10,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:10,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:10,062 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 15:43:10,064 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 15:43:10,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 15:43:10,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:43:10,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 15:43:10,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:10,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:43:10,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-30 15:43:10,469 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 15:43:10,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:10,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:43:10,644 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 77 treesize of output 79 [2023-08-30 15:43:10,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:43:10,649 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 19 treesize of output 6 [2023-08-30 15:43:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:43:10,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663996445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:43:10,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:43:10,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 27 [2023-08-30 15:43:10,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951817270] [2023-08-30 15:43:10,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:43:10,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:43:10,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:10,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:43:10,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=732, Unknown=3, NotChecked=0, Total=812 [2023-08-30 15:43:12,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-08-30 15:43:12,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 532 transitions, 10052 flow. Second operand has 29 states, 29 states have (on average 93.34482758620689) internal successors, (2707), 29 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:12,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:12,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-08-30 15:43:12,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:14,643 INFO L130 PetriNetUnfolder]: 3036/5479 cut-off events. [2023-08-30 15:43:14,643 INFO L131 PetriNetUnfolder]: For 71233/71233 co-relation queries the response was YES. [2023-08-30 15:43:14,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42741 conditions, 5479 events. 3036/5479 cut-off events. For 71233/71233 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38928 event pairs, 77 based on Foata normal form. 48/5423 useless extension candidates. Maximal degree in co-relation 42673. Up to 1665 conditions per place. [2023-08-30 15:43:14,685 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 322 selfloop transitions, 440 changer transitions 0/763 dead transitions. [2023-08-30 15:43:14,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 763 transitions, 14838 flow [2023-08-30 15:43:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 15:43:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 15:43:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2621 transitions. [2023-08-30 15:43:14,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3235802469135802 [2023-08-30 15:43:14,688 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2621 transitions. [2023-08-30 15:43:14,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2621 transitions. [2023-08-30 15:43:14,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:14,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2621 transitions. [2023-08-30 15:43:14,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 97.07407407407408) internal successors, (2621), 27 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:14,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 300.0) internal successors, (8400), 28 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:14,695 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 300.0) internal successors, (8400), 28 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:14,695 INFO L175 Difference]: Start difference. First operand has 232 places, 532 transitions, 10052 flow. Second operand 27 states and 2621 transitions. [2023-08-30 15:43:14,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 763 transitions, 14838 flow [2023-08-30 15:43:15,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 763 transitions, 14310 flow, removed 165 selfloop flow, removed 13 redundant places. [2023-08-30 15:43:15,020 INFO L231 Difference]: Finished difference. Result has 245 places, 577 transitions, 11364 flow [2023-08-30 15:43:15,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=9592, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11364, PETRI_PLACES=245, PETRI_TRANSITIONS=577} [2023-08-30 15:43:15,021 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 214 predicate places. [2023-08-30 15:43:15,021 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 577 transitions, 11364 flow [2023-08-30 15:43:15,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 93.34482758620689) internal successors, (2707), 29 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:15,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:15,022 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:15,026 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 15:43:15,222 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 15:43:15,222 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:43:15,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1640022570, now seen corresponding path program 5 times [2023-08-30 15:43:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:15,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792174465] [2023-08-30 15:43:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:15,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:15,726 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 15:43:15,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:15,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792174465] [2023-08-30 15:43:15,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792174465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:15,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348902696] [2023-08-30 15:43:15,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:43:15,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:15,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:15,728 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 15:43:15,730 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 15:43:15,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 15:43:15,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:43:15,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 15:43:15,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:16,011 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 15:43:16,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:16,086 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 15:43:16,086 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 25 treesize of output 13 [2023-08-30 15:43:16,100 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 15:43:16,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348902696] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:43:16,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:43:16,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-08-30 15:43:16,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864554993] [2023-08-30 15:43:16,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:43:16,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 15:43:16,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:16,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 15:43:16,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2023-08-30 15:43:17,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 300 [2023-08-30 15:43:17,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 577 transitions, 11364 flow. Second operand has 24 states, 24 states have (on average 109.5) internal successors, (2628), 24 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:17,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:17,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 300 [2023-08-30 15:43:17,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:19,298 INFO L130 PetriNetUnfolder]: 3436/6323 cut-off events. [2023-08-30 15:43:19,298 INFO L131 PetriNetUnfolder]: For 88360/88360 co-relation queries the response was YES. [2023-08-30 15:43:19,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49174 conditions, 6323 events. 3436/6323 cut-off events. For 88360/88360 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 47044 event pairs, 237 based on Foata normal form. 88/6247 useless extension candidates. Maximal degree in co-relation 49106. Up to 3014 conditions per place. [2023-08-30 15:43:19,356 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 308 selfloop transitions, 488 changer transitions 0/797 dead transitions. [2023-08-30 15:43:19,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 797 transitions, 15720 flow [2023-08-30 15:43:19,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 15:43:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 15:43:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2978 transitions. [2023-08-30 15:43:19,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817948717948718 [2023-08-30 15:43:19,359 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2978 transitions. [2023-08-30 15:43:19,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2978 transitions. [2023-08-30 15:43:19,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:19,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2978 transitions. [2023-08-30 15:43:19,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 114.53846153846153) internal successors, (2978), 26 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:19,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 300.0) internal successors, (8100), 27 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:19,365 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 300.0) internal successors, (8100), 27 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:19,365 INFO L175 Difference]: Start difference. First operand has 245 places, 577 transitions, 11364 flow. Second operand 26 states and 2978 transitions. [2023-08-30 15:43:19,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 797 transitions, 15720 flow [2023-08-30 15:43:19,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 797 transitions, 15104 flow, removed 69 selfloop flow, removed 18 redundant places. [2023-08-30 15:43:19,832 INFO L231 Difference]: Finished difference. Result has 256 places, 721 transitions, 14471 flow [2023-08-30 15:43:19,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=10878, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14471, PETRI_PLACES=256, PETRI_TRANSITIONS=721} [2023-08-30 15:43:19,833 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 225 predicate places. [2023-08-30 15:43:19,833 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 721 transitions, 14471 flow [2023-08-30 15:43:19,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 109.5) internal successors, (2628), 24 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:19,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:19,833 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:19,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-30 15:43:20,036 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 15:43:20,037 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:43:20,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:20,037 INFO L85 PathProgramCache]: Analyzing trace with hash -423938698, now seen corresponding path program 6 times [2023-08-30 15:43:20,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:20,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047226915] [2023-08-30 15:43:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:20,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:43:20,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:20,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047226915] [2023-08-30 15:43:20,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047226915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:20,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965128460] [2023-08-30 15:43:20,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:43:20,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:20,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:20,737 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 15:43:20,739 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 15:43:20,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 15:43:20,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:43:20,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 15:43:20,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:20,956 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 15:43:20,986 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 15:43:21,017 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 15:43:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:43:21,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:21,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:43:21,879 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 62 treesize of output 50 [2023-08-30 15:43:21,889 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 15:43:21,889 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 148 treesize of output 135 [2023-08-30 15:43:21,898 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 15:43:21,898 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 132 treesize of output 108 [2023-08-30 15:43:21,910 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 15:43:21,910 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 83 treesize of output 71 [2023-08-30 15:43:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:43:22,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965128460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:43:22,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:43:22,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-30 15:43:22,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895130986] [2023-08-30 15:43:22,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:43:22,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 15:43:22,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:22,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 15:43:22,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1002, Unknown=1, NotChecked=0, Total=1260 [2023-08-30 15:43:24,180 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 15:43:24,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:43:24,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 721 transitions, 14471 flow. Second operand has 36 states, 36 states have (on average 90.25) internal successors, (3249), 36 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:24,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:24,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:43:24,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:28,737 INFO L130 PetriNetUnfolder]: 3301/6135 cut-off events. [2023-08-30 15:43:28,737 INFO L131 PetriNetUnfolder]: For 95491/95491 co-relation queries the response was YES. [2023-08-30 15:43:28,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49326 conditions, 6135 events. 3301/6135 cut-off events. For 95491/95491 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 46396 event pairs, 832 based on Foata normal form. 360/6371 useless extension candidates. Maximal degree in co-relation 49254. Up to 3583 conditions per place. [2023-08-30 15:43:28,790 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 639 selfloop transitions, 291 changer transitions 43/974 dead transitions. [2023-08-30 15:43:28,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 974 transitions, 19611 flow [2023-08-30 15:43:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 15:43:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 15:43:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4071 transitions. [2023-08-30 15:43:28,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3155813953488372 [2023-08-30 15:43:28,793 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4071 transitions. [2023-08-30 15:43:28,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4071 transitions. [2023-08-30 15:43:28,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:28,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4071 transitions. [2023-08-30 15:43:28,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 94.67441860465117) internal successors, (4071), 43 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:28,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 300.0) internal successors, (13200), 44 states have internal predecessors, (13200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:28,804 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 300.0) internal successors, (13200), 44 states have internal predecessors, (13200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:28,804 INFO L175 Difference]: Start difference. First operand has 256 places, 721 transitions, 14471 flow. Second operand 43 states and 4071 transitions. [2023-08-30 15:43:28,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 974 transitions, 19611 flow [2023-08-30 15:43:29,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 974 transitions, 18009 flow, removed 316 selfloop flow, removed 13 redundant places. [2023-08-30 15:43:29,413 INFO L231 Difference]: Finished difference. Result has 301 places, 795 transitions, 15739 flow [2023-08-30 15:43:29,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=12040, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=15739, PETRI_PLACES=301, PETRI_TRANSITIONS=795} [2023-08-30 15:43:29,415 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 270 predicate places. [2023-08-30 15:43:29,415 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 795 transitions, 15739 flow [2023-08-30 15:43:29,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 90.25) internal successors, (3249), 36 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:29,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:29,416 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:29,425 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 15:43:29,621 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 15:43:29,621 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:43:29,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:29,621 INFO L85 PathProgramCache]: Analyzing trace with hash 518647421, now seen corresponding path program 9 times [2023-08-30 15:43:29,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:29,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137249717] [2023-08-30 15:43:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:29,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:30,565 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 15:43:30,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137249717] [2023-08-30 15:43:30,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137249717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989333853] [2023-08-30 15:43:30,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:43:30,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:30,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:30,566 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 15:43:30,568 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 15:43:30,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:43:30,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:43:30,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 15:43:30,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:30,953 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 15:43:30,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:31,205 INFO L321 Elim1Store]: treesize reduction 21, result has 75.3 percent of original size [2023-08-30 15:43:31,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 82 [2023-08-30 15:43:31,247 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 15:43:31,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989333853] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:43:31,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:43:31,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 25 [2023-08-30 15:43:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115768620] [2023-08-30 15:43:31,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:43:31,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 15:43:31,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 15:43:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-08-30 15:43:32,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 300 [2023-08-30 15:43:32,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 795 transitions, 15739 flow. Second operand has 27 states, 27 states have (on average 109.29629629629629) internal successors, (2951), 27 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:32,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:32,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 300 [2023-08-30 15:43:32,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:36,344 INFO L130 PetriNetUnfolder]: 3454/6348 cut-off events. [2023-08-30 15:43:36,344 INFO L131 PetriNetUnfolder]: For 107137/107137 co-relation queries the response was YES. [2023-08-30 15:43:36,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52307 conditions, 6348 events. 3454/6348 cut-off events. For 107137/107137 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 47509 event pairs, 773 based on Foata normal form. 82/6368 useless extension candidates. Maximal degree in co-relation 52220. Up to 4985 conditions per place. [2023-08-30 15:43:36,399 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 644 selfloop transitions, 349 changer transitions 13/1007 dead transitions. [2023-08-30 15:43:36,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1007 transitions, 20442 flow [2023-08-30 15:43:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 15:43:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 15:43:36,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5302 transitions. [2023-08-30 15:43:36,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3760283687943262 [2023-08-30 15:43:36,402 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5302 transitions. [2023-08-30 15:43:36,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5302 transitions. [2023-08-30 15:43:36,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:36,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5302 transitions. [2023-08-30 15:43:36,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 112.80851063829788) internal successors, (5302), 47 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:36,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 300.0) internal successors, (14400), 48 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:36,413 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 300.0) internal successors, (14400), 48 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:36,413 INFO L175 Difference]: Start difference. First operand has 301 places, 795 transitions, 15739 flow. Second operand 47 states and 5302 transitions. [2023-08-30 15:43:36,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1007 transitions, 20442 flow [2023-08-30 15:43:37,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1007 transitions, 19088 flow, removed 644 selfloop flow, removed 11 redundant places. [2023-08-30 15:43:37,266 INFO L231 Difference]: Finished difference. Result has 355 places, 892 transitions, 17372 flow [2023-08-30 15:43:37,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=14288, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=17372, PETRI_PLACES=355, PETRI_TRANSITIONS=892} [2023-08-30 15:43:37,268 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 324 predicate places. [2023-08-30 15:43:37,268 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 892 transitions, 17372 flow [2023-08-30 15:43:37,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 109.29629629629629) internal successors, (2951), 27 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:37,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:37,269 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:37,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 15:43:37,475 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 15:43:37,475 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:43:37,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:37,476 INFO L85 PathProgramCache]: Analyzing trace with hash 518627931, now seen corresponding path program 4 times [2023-08-30 15:43:37,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:37,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788095405] [2023-08-30 15:43:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:37,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:38,231 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 15:43:38,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:38,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788095405] [2023-08-30 15:43:38,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788095405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:38,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364219816] [2023-08-30 15:43:38,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:43:38,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:38,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:38,232 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 15:43:38,234 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 15:43:38,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:43:38,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:43:38,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 15:43:38,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:43:38,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:38,796 INFO L321 Elim1Store]: treesize reduction 15, result has 61.5 percent of original size [2023-08-30 15:43:38,796 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 50 treesize of output 38 [2023-08-30 15:43:39,062 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 15:43:39,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364219816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:43:39,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:43:39,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 32 [2023-08-30 15:43:39,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960360357] [2023-08-30 15:43:39,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:43:39,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 15:43:39,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:39,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 15:43:39,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 15:43:40,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 300 [2023-08-30 15:43:40,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 892 transitions, 17372 flow. Second operand has 34 states, 34 states have (on average 107.32352941176471) internal successors, (3649), 34 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:40,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:40,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 300 [2023-08-30 15:43:40,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:46,390 INFO L130 PetriNetUnfolder]: 3850/7178 cut-off events. [2023-08-30 15:43:46,390 INFO L131 PetriNetUnfolder]: For 118087/118087 co-relation queries the response was YES. [2023-08-30 15:43:46,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57992 conditions, 7178 events. 3850/7178 cut-off events. For 118087/118087 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 55925 event pairs, 318 based on Foata normal form. 64/7172 useless extension candidates. Maximal degree in co-relation 57884. Up to 3203 conditions per place. [2023-08-30 15:43:46,460 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 537 selfloop transitions, 695 changer transitions 4/1237 dead transitions. [2023-08-30 15:43:46,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1237 transitions, 23928 flow [2023-08-30 15:43:46,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-30 15:43:46,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-30 15:43:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 6332 transitions. [2023-08-30 15:43:46,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37029239766081873 [2023-08-30 15:43:46,464 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 6332 transitions. [2023-08-30 15:43:46,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 6332 transitions. [2023-08-30 15:43:46,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:46,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 6332 transitions. [2023-08-30 15:43:46,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 111.08771929824562) internal successors, (6332), 57 states have internal predecessors, (6332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:46,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 300.0) internal successors, (17400), 58 states have internal predecessors, (17400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:46,479 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 300.0) internal successors, (17400), 58 states have internal predecessors, (17400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:46,480 INFO L175 Difference]: Start difference. First operand has 355 places, 892 transitions, 17372 flow. Second operand 57 states and 6332 transitions. [2023-08-30 15:43:46,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1237 transitions, 23928 flow [2023-08-30 15:43:47,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1237 transitions, 23109 flow, removed 381 selfloop flow, removed 13 redundant places. [2023-08-30 15:43:47,593 INFO L231 Difference]: Finished difference. Result has 410 places, 1101 transitions, 22493 flow [2023-08-30 15:43:47,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=16609, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=22493, PETRI_PLACES=410, PETRI_TRANSITIONS=1101} [2023-08-30 15:43:47,594 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 379 predicate places. [2023-08-30 15:43:47,594 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 1101 transitions, 22493 flow [2023-08-30 15:43:47,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 107.32352941176471) internal successors, (3649), 34 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:47,595 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:47,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 15:43:47,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 15:43:47,801 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:43:47,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:47,801 INFO L85 PathProgramCache]: Analyzing trace with hash 518627984, now seen corresponding path program 6 times [2023-08-30 15:43:47,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:47,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567795719] [2023-08-30 15:43:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:47,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:48,505 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 15:43:48,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:48,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567795719] [2023-08-30 15:43:48,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567795719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:48,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024545917] [2023-08-30 15:43:48,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:43:48,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:48,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:48,509 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:43:48,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 15:43:48,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 15:43:48,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:43:48,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 15:43:48,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:48,745 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 15:43:48,779 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 15:43:48,810 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 15:43:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:43:48,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:49,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:43:49,402 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 61 treesize of output 49 [2023-08-30 15:43:49,410 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 15:43:49,410 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 144 treesize of output 132 [2023-08-30 15:43:49,418 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 15:43:49,418 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 127 treesize of output 101 [2023-08-30 15:43:49,425 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 15:43:49,426 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 80 treesize of output 67 [2023-08-30 15:43:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:43:49,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024545917] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:43:49,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:43:49,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-30 15:43:49,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104872524] [2023-08-30 15:43:49,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:43:49,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 15:43:49,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:49,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 15:43:49,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1071, Unknown=2, NotChecked=0, Total=1260 [2023-08-30 15:43:51,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:43:54,080 WARN L539 Checker$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 15:43:56,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:43:58,640 WARN L539 Checker$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 15:44:00,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:44:02,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:44:02,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:44:02,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 1101 transitions, 22493 flow. Second operand has 36 states, 36 states have (on average 90.25) internal successors, (3249), 36 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:02,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:02,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:44:02,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:07,395 INFO L130 PetriNetUnfolder]: 3058/5798 cut-off events. [2023-08-30 15:44:07,395 INFO L131 PetriNetUnfolder]: For 103473/103473 co-relation queries the response was YES. [2023-08-30 15:44:07,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50612 conditions, 5798 events. 3058/5798 cut-off events. For 103473/103473 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43934 event pairs, 900 based on Foata normal form. 303/6055 useless extension candidates. Maximal degree in co-relation 50490. Up to 4104 conditions per place. [2023-08-30 15:44:07,453 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 700 selfloop transitions, 353 changer transitions 7/1061 dead transitions. [2023-08-30 15:44:07,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1061 transitions, 22756 flow [2023-08-30 15:44:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 15:44:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 15:44:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3378 transitions. [2023-08-30 15:44:07,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31277777777777777 [2023-08-30 15:44:07,455 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3378 transitions. [2023-08-30 15:44:07,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3378 transitions. [2023-08-30 15:44:07,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:07,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3378 transitions. [2023-08-30 15:44:07,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 93.83333333333333) internal successors, (3378), 36 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:07,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 300.0) internal successors, (11100), 37 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:07,463 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 300.0) internal successors, (11100), 37 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:07,463 INFO L175 Difference]: Start difference. First operand has 410 places, 1101 transitions, 22493 flow. Second operand 36 states and 3378 transitions. [2023-08-30 15:44:07,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1061 transitions, 22756 flow [2023-08-30 15:44:08,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1061 transitions, 21401 flow, removed 664 selfloop flow, removed 11 redundant places. [2023-08-30 15:44:08,608 INFO L231 Difference]: Finished difference. Result has 428 places, 971 transitions, 19552 flow [2023-08-30 15:44:08,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=18309, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=19552, PETRI_PLACES=428, PETRI_TRANSITIONS=971} [2023-08-30 15:44:08,609 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 397 predicate places. [2023-08-30 15:44:08,609 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 971 transitions, 19552 flow [2023-08-30 15:44:08,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 90.25) internal successors, (3249), 36 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:08,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:08,610 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:08,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 15:44:08,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 15:44:08,811 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:44:08,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash -325955605, now seen corresponding path program 10 times [2023-08-30 15:44:08,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:08,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524843064] [2023-08-30 15:44:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:09,429 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 15:44:09,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:09,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524843064] [2023-08-30 15:44:09,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524843064] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:09,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043618851] [2023-08-30 15:44:09,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:44:09,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:09,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:09,431 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:44:09,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 15:44:09,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:44:09,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:44:09,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 15:44:09,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:09,926 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 15:44:09,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:44:10,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:10,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 104 [2023-08-30 15:44:10,377 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 15:44:10,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043618851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:44:10,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:44:10,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-30 15:44:10,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153619393] [2023-08-30 15:44:10,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:44:10,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 15:44:10,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:10,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 15:44:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 15:44:11,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 300 [2023-08-30 15:44:11,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 971 transitions, 19552 flow. Second operand has 35 states, 35 states have (on average 112.28571428571429) internal successors, (3930), 35 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:11,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:11,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 300 [2023-08-30 15:44:11,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:14,520 INFO L130 PetriNetUnfolder]: 3135/5907 cut-off events. [2023-08-30 15:44:14,520 INFO L131 PetriNetUnfolder]: For 93055/93055 co-relation queries the response was YES. [2023-08-30 15:44:14,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50350 conditions, 5907 events. 3135/5907 cut-off events. For 93055/93055 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 44375 event pairs, 626 based on Foata normal form. 34/5879 useless extension candidates. Maximal degree in co-relation 50227. Up to 5341 conditions per place. [2023-08-30 15:44:14,575 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 861 selfloop transitions, 198 changer transitions 6/1066 dead transitions. [2023-08-30 15:44:14,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1066 transitions, 22994 flow [2023-08-30 15:44:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 15:44:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 15:44:14,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3219 transitions. [2023-08-30 15:44:14,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38321428571428573 [2023-08-30 15:44:14,577 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3219 transitions. [2023-08-30 15:44:14,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3219 transitions. [2023-08-30 15:44:14,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:14,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3219 transitions. [2023-08-30 15:44:14,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 114.96428571428571) internal successors, (3219), 28 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:14,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 300.0) internal successors, (8700), 29 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:14,584 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 300.0) internal successors, (8700), 29 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:14,584 INFO L175 Difference]: Start difference. First operand has 428 places, 971 transitions, 19552 flow. Second operand 28 states and 3219 transitions. [2023-08-30 15:44:14,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1066 transitions, 22994 flow [2023-08-30 15:44:15,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1066 transitions, 22461 flow, removed 211 selfloop flow, removed 14 redundant places. [2023-08-30 15:44:15,448 INFO L231 Difference]: Finished difference. Result has 453 places, 1012 transitions, 20577 flow [2023-08-30 15:44:15,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=18924, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=20577, PETRI_PLACES=453, PETRI_TRANSITIONS=1012} [2023-08-30 15:44:15,449 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 422 predicate places. [2023-08-30 15:44:15,449 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1012 transitions, 20577 flow [2023-08-30 15:44:15,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 112.28571428571429) internal successors, (3930), 35 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:15,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:15,450 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:15,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 15:44:15,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-08-30 15:44:15,650 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:44:15,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:15,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1972050161, now seen corresponding path program 11 times [2023-08-30 15:44:15,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:15,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115675066] [2023-08-30 15:44:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:15,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:16,294 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 15:44:16,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:16,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115675066] [2023-08-30 15:44:16,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115675066] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:16,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379644399] [2023-08-30 15:44:16,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:44:16,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:16,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:16,296 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:44:16,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 15:44:16,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 15:44:16,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:44:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-30 15:44:16,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:16,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 15:44:16,528 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 15:44:16,560 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 15:44:16,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:16,820 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 42 treesize of output 40 [2023-08-30 15:44:17,003 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 15:44:17,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:44:17,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:17,691 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 218 treesize of output 123 [2023-08-30 15:44:17,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:17,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 240 treesize of output 272 [2023-08-30 15:44:17,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 74 [2023-08-30 15:44:17,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:17,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 121 treesize of output 165 [2023-08-30 15:44:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:20,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379644399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:44:20,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:44:20,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-30 15:44:20,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168639053] [2023-08-30 15:44:20,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:44:20,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 15:44:20,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:20,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 15:44:20,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1219, Unknown=3, NotChecked=0, Total=1406 [2023-08-30 15:44:21,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:44:21,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1012 transitions, 20577 flow. Second operand has 38 states, 38 states have (on average 90.1842105263158) internal successors, (3427), 38 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:21,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:21,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:44:21,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:27,977 INFO L130 PetriNetUnfolder]: 3438/6561 cut-off events. [2023-08-30 15:44:27,977 INFO L131 PetriNetUnfolder]: For 108526/108526 co-relation queries the response was YES. [2023-08-30 15:44:28,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55859 conditions, 6561 events. 3438/6561 cut-off events. For 108526/108526 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 51164 event pairs, 572 based on Foata normal form. 108/6585 useless extension candidates. Maximal degree in co-relation 55726. Up to 4516 conditions per place. [2023-08-30 15:44:28,041 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 762 selfloop transitions, 489 changer transitions 15/1267 dead transitions. [2023-08-30 15:44:28,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1267 transitions, 26022 flow [2023-08-30 15:44:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-30 15:44:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-30 15:44:28,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4873 transitions. [2023-08-30 15:44:28,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3123717948717949 [2023-08-30 15:44:28,045 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4873 transitions. [2023-08-30 15:44:28,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4873 transitions. [2023-08-30 15:44:28,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:28,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4873 transitions. [2023-08-30 15:44:28,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 93.71153846153847) internal successors, (4873), 52 states have internal predecessors, (4873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:28,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 300.0) internal successors, (15900), 53 states have internal predecessors, (15900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:28,055 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 300.0) internal successors, (15900), 53 states have internal predecessors, (15900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:28,055 INFO L175 Difference]: Start difference. First operand has 453 places, 1012 transitions, 20577 flow. Second operand 52 states and 4873 transitions. [2023-08-30 15:44:28,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1267 transitions, 26022 flow [2023-08-30 15:44:29,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1267 transitions, 25734 flow, removed 133 selfloop flow, removed 9 redundant places. [2023-08-30 15:44:29,150 INFO L231 Difference]: Finished difference. Result has 514 places, 1138 transitions, 23822 flow [2023-08-30 15:44:29,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=19905, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=23822, PETRI_PLACES=514, PETRI_TRANSITIONS=1138} [2023-08-30 15:44:29,151 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 483 predicate places. [2023-08-30 15:44:29,151 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 1138 transitions, 23822 flow [2023-08-30 15:44:29,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 90.1842105263158) internal successors, (3427), 38 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:29,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:29,152 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:29,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 15:44:29,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:29,353 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:44:29,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:29,353 INFO L85 PathProgramCache]: Analyzing trace with hash -723583917, now seen corresponding path program 5 times [2023-08-30 15:44:29,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:29,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968242994] [2023-08-30 15:44:29,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:29,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:29,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:29,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968242994] [2023-08-30 15:44:29,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968242994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:29,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933771734] [2023-08-30 15:44:29,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:44:29,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:29,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:29,813 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:44:29,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 15:44:29,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 15:44:29,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:44:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 15:44:29,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:44:30,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:44:30,830 INFO L321 Elim1Store]: treesize reduction 21, result has 75.3 percent of original size [2023-08-30 15:44:30,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 326 treesize of output 155 [2023-08-30 15:44:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:44:30,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933771734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:44:30,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:44:30,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 27 [2023-08-30 15:44:30,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169980277] [2023-08-30 15:44:30,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:44:30,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:44:30,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:30,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:44:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2023-08-30 15:44:32,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 300 [2023-08-30 15:44:32,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 1138 transitions, 23822 flow. Second operand has 29 states, 29 states have (on average 113.37931034482759) internal successors, (3288), 29 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:32,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:32,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 300 [2023-08-30 15:44:32,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:37,530 INFO L130 PetriNetUnfolder]: 3837/7294 cut-off events. [2023-08-30 15:44:37,530 INFO L131 PetriNetUnfolder]: For 137267/137267 co-relation queries the response was YES. [2023-08-30 15:44:37,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65244 conditions, 7294 events. 3837/7294 cut-off events. For 137267/137267 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 57026 event pairs, 500 based on Foata normal form. 172/7398 useless extension candidates. Maximal degree in co-relation 65089. Up to 5565 conditions per place. [2023-08-30 15:44:37,774 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 911 selfloop transitions, 462 changer transitions 33/1407 dead transitions. [2023-08-30 15:44:37,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1407 transitions, 30704 flow [2023-08-30 15:44:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 15:44:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 15:44:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4931 transitions. [2023-08-30 15:44:37,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39134920634920634 [2023-08-30 15:44:37,778 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4931 transitions. [2023-08-30 15:44:37,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4931 transitions. [2023-08-30 15:44:37,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:37,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4931 transitions. [2023-08-30 15:44:37,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 117.4047619047619) internal successors, (4931), 42 states have internal predecessors, (4931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:37,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 300.0) internal successors, (12900), 43 states have internal predecessors, (12900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:37,789 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 300.0) internal successors, (12900), 43 states have internal predecessors, (12900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:37,789 INFO L175 Difference]: Start difference. First operand has 514 places, 1138 transitions, 23822 flow. Second operand 42 states and 4931 transitions. [2023-08-30 15:44:37,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1407 transitions, 30704 flow [2023-08-30 15:44:39,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 1407 transitions, 29861 flow, removed 354 selfloop flow, removed 14 redundant places. [2023-08-30 15:44:39,349 INFO L231 Difference]: Finished difference. Result has 559 places, 1292 transitions, 27916 flow [2023-08-30 15:44:39,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=22845, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=27916, PETRI_PLACES=559, PETRI_TRANSITIONS=1292} [2023-08-30 15:44:39,350 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 528 predicate places. [2023-08-30 15:44:39,350 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 1292 transitions, 27916 flow [2023-08-30 15:44:39,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 113.37931034482759) internal successors, (3288), 29 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:39,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:39,351 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:39,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-30 15:44:39,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:39,553 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:44:39,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:39,553 INFO L85 PathProgramCache]: Analyzing trace with hash -366295795, now seen corresponding path program 12 times [2023-08-30 15:44:39,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:39,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478527066] [2023-08-30 15:44:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:39,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:40,524 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 15:44:40,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:40,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478527066] [2023-08-30 15:44:40,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478527066] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:40,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951705566] [2023-08-30 15:44:40,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:44:40,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:40,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:40,526 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:44:40,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 15:44:40,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 15:44:40,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:44:40,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 15:44:40,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:44:40,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:44:41,209 INFO L321 Elim1Store]: treesize reduction 21, result has 75.3 percent of original size [2023-08-30 15:44:41,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 82 [2023-08-30 15:44:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:44:41,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951705566] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:44:41,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:44:41,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 28 [2023-08-30 15:44:41,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216704561] [2023-08-30 15:44:41,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:44:41,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 15:44:41,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:41,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 15:44:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2023-08-30 15:44:42,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 300 [2023-08-30 15:44:42,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 1292 transitions, 27916 flow. Second operand has 30 states, 30 states have (on average 113.33333333333333) internal successors, (3400), 30 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:42,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:42,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 300 [2023-08-30 15:44:42,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:49,231 INFO L130 PetriNetUnfolder]: 4631/8622 cut-off events. [2023-08-30 15:44:49,231 INFO L131 PetriNetUnfolder]: For 198927/198927 co-relation queries the response was YES. [2023-08-30 15:44:49,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82117 conditions, 8622 events. 4631/8622 cut-off events. For 198927/198927 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 67594 event pairs, 897 based on Foata normal form. 104/8642 useless extension candidates. Maximal degree in co-relation 81946. Up to 5574 conditions per place. [2023-08-30 15:44:49,348 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 905 selfloop transitions, 890 changer transitions 16/1812 dead transitions. [2023-08-30 15:44:49,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1812 transitions, 41696 flow [2023-08-30 15:44:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-30 15:44:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-30 15:44:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 7153 transitions. [2023-08-30 15:44:49,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908743169398907 [2023-08-30 15:44:49,353 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 7153 transitions. [2023-08-30 15:44:49,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 7153 transitions. [2023-08-30 15:44:49,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:49,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 7153 transitions. [2023-08-30 15:44:49,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 117.26229508196721) internal successors, (7153), 61 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:49,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 300.0) internal successors, (18600), 62 states have internal predecessors, (18600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:49,373 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 300.0) internal successors, (18600), 62 states have internal predecessors, (18600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:49,373 INFO L175 Difference]: Start difference. First operand has 559 places, 1292 transitions, 27916 flow. Second operand 61 states and 7153 transitions. [2023-08-30 15:44:49,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1812 transitions, 41696 flow [2023-08-30 15:44:51,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 1812 transitions, 39880 flow, removed 881 selfloop flow, removed 11 redundant places. [2023-08-30 15:44:51,712 INFO L231 Difference]: Finished difference. Result has 626 places, 1662 transitions, 37942 flow [2023-08-30 15:44:51,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=26684, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=37942, PETRI_PLACES=626, PETRI_TRANSITIONS=1662} [2023-08-30 15:44:51,713 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 595 predicate places. [2023-08-30 15:44:51,713 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 1662 transitions, 37942 flow [2023-08-30 15:44:51,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 113.33333333333333) internal successors, (3400), 30 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:51,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:51,714 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:51,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-30 15:44:51,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:51,920 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:44:51,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:51,920 INFO L85 PathProgramCache]: Analyzing trace with hash -343848805, now seen corresponding path program 13 times [2023-08-30 15:44:51,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:51,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115286183] [2023-08-30 15:44:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:51,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:52,523 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 15:44:52,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:52,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115286183] [2023-08-30 15:44:52,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115286183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:52,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489829882] [2023-08-30 15:44:52,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:44:52,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:52,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:52,525 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:44:52,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 15:44:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:52,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 15:44:52,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:52,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 15:44:52,750 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 15:44:52,782 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 15:44:52,810 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 15:44:53,046 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 15:44:53,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:44:53,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:53,647 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 227 treesize of output 132 [2023-08-30 15:44:53,723 INFO L321 Elim1Store]: treesize reduction 21, result has 75.3 percent of original size [2023-08-30 15:44:53,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 768 treesize of output 727 [2023-08-30 15:44:53,754 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:44:53,758 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:44:53,760 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:44:53,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:53,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 246 treesize of output 266 [2023-08-30 15:44:53,868 INFO L321 Elim1Store]: treesize reduction 24, result has 71.8 percent of original size [2023-08-30 15:44:53,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 245 treesize of output 225 [2023-08-30 15:44:55,705 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 15:44:55,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489829882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:44:55,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:44:55,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-08-30 15:44:55,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429419569] [2023-08-30 15:44:55,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:44:55,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 15:44:55,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 15:44:55,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1071, Unknown=4, NotChecked=0, Total=1332 [2023-08-30 15:44:56,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:44:56,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 1662 transitions, 37942 flow. Second operand has 37 states, 37 states have (on average 90.21621621621621) internal successors, (3338), 37 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:56,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:56,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:44:56,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:58,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:45:04,718 INFO L130 PetriNetUnfolder]: 4598/8547 cut-off events. [2023-08-30 15:45:04,719 INFO L131 PetriNetUnfolder]: For 214207/214207 co-relation queries the response was YES. [2023-08-30 15:45:04,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84068 conditions, 8547 events. 4598/8547 cut-off events. For 214207/214207 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 66805 event pairs, 817 based on Foata normal form. 36/8511 useless extension candidates. Maximal degree in co-relation 83879. Up to 7453 conditions per place. [2023-08-30 15:45:04,840 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 1300 selfloop transitions, 429 changer transitions 18/1748 dead transitions. [2023-08-30 15:45:04,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 1748 transitions, 42730 flow [2023-08-30 15:45:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 15:45:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 15:45:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3423 transitions. [2023-08-30 15:45:04,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3083783783783784 [2023-08-30 15:45:04,844 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3423 transitions. [2023-08-30 15:45:04,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3423 transitions. [2023-08-30 15:45:04,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:45:04,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3423 transitions. [2023-08-30 15:45:04,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 92.51351351351352) internal successors, (3423), 37 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:04,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 300.0) internal successors, (11400), 38 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:04,858 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 300.0) internal successors, (11400), 38 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:04,858 INFO L175 Difference]: Start difference. First operand has 626 places, 1662 transitions, 37942 flow. Second operand 37 states and 3423 transitions. [2023-08-30 15:45:04,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 1748 transitions, 42730 flow [2023-08-30 15:45:08,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 1748 transitions, 39442 flow, removed 1554 selfloop flow, removed 20 redundant places. [2023-08-30 15:45:08,240 INFO L231 Difference]: Finished difference. Result has 641 places, 1663 transitions, 35954 flow [2023-08-30 15:45:08,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=33828, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=35954, PETRI_PLACES=641, PETRI_TRANSITIONS=1663} [2023-08-30 15:45:08,242 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 610 predicate places. [2023-08-30 15:45:08,242 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 1663 transitions, 35954 flow [2023-08-30 15:45:08,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 90.21621621621621) internal successors, (3338), 37 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:08,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:45:08,243 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:45:08,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-08-30 15:45:08,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-30 15:45:08,443 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:45:08,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:45:08,444 INFO L85 PathProgramCache]: Analyzing trace with hash -268312808, now seen corresponding path program 7 times [2023-08-30 15:45:08,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:45:08,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941356343] [2023-08-30 15:45:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:45:08,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:45:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:45:08,914 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 15:45:08,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:45:08,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941356343] [2023-08-30 15:45:08,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941356343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:45:08,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469713654] [2023-08-30 15:45:08,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:45:08,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:45:08,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:45:08,915 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:45:08,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 15:45:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:45:09,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 15:45:09,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:45:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:45:09,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:45:09,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:09,221 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 19 [2023-08-30 15:45:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:45:09,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469713654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:45:09,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:45:09,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 21 [2023-08-30 15:45:09,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822956029] [2023-08-30 15:45:09,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:45:09,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 15:45:09,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:45:09,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 15:45:09,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-08-30 15:45:09,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 15:45:09,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 1663 transitions, 35954 flow. Second operand has 23 states, 23 states have (on average 114.56521739130434) internal successors, (2635), 23 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:09,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:45:09,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 15:45:09,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:45:15,549 INFO L130 PetriNetUnfolder]: 5307/9862 cut-off events. [2023-08-30 15:45:15,549 INFO L131 PetriNetUnfolder]: For 250218/250218 co-relation queries the response was YES. [2023-08-30 15:45:15,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95196 conditions, 9862 events. 5307/9862 cut-off events. For 250218/250218 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 78899 event pairs, 401 based on Foata normal form. 212/10022 useless extension candidates. Maximal degree in co-relation 95007. Up to 5421 conditions per place. [2023-08-30 15:45:15,676 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 907 selfloop transitions, 1098 changer transitions 7/2013 dead transitions. [2023-08-30 15:45:15,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 2013 transitions, 47550 flow [2023-08-30 15:45:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 15:45:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 15:45:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2877 transitions. [2023-08-30 15:45:15,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39958333333333335 [2023-08-30 15:45:15,679 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2877 transitions. [2023-08-30 15:45:15,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2877 transitions. [2023-08-30 15:45:15,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:45:15,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2877 transitions. [2023-08-30 15:45:15,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 119.875) internal successors, (2877), 24 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:15,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 300.0) internal successors, (7500), 25 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:15,684 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 300.0) internal successors, (7500), 25 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:15,684 INFO L175 Difference]: Start difference. First operand has 641 places, 1663 transitions, 35954 flow. Second operand 24 states and 2877 transitions. [2023-08-30 15:45:15,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 2013 transitions, 47550 flow [2023-08-30 15:45:19,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 2013 transitions, 47197 flow, removed 127 selfloop flow, removed 20 redundant places. [2023-08-30 15:45:19,231 INFO L231 Difference]: Finished difference. Result has 637 places, 1921 transitions, 44684 flow [2023-08-30 15:45:19,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=34912, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=802, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=44684, PETRI_PLACES=637, PETRI_TRANSITIONS=1921} [2023-08-30 15:45:19,233 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 606 predicate places. [2023-08-30 15:45:19,233 INFO L495 AbstractCegarLoop]: Abstraction has has 637 places, 1921 transitions, 44684 flow [2023-08-30 15:45:19,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 114.56521739130434) internal successors, (2635), 23 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:19,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:45:19,234 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:45:19,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-30 15:45:19,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-30 15:45:19,435 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:45:19,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:45:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1807803334, now seen corresponding path program 8 times [2023-08-30 15:45:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:45:19,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221412031] [2023-08-30 15:45:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:45:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:45:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:45:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:45:19,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:45:19,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221412031] [2023-08-30 15:45:19,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221412031] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:45:19,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294223168] [2023-08-30 15:45:19,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:45:19,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:45:20,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:45:20,001 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:45:20,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 15:45:20,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:45:20,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:45:20,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 15:45:20,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:45:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 15:45:20,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:45:20,397 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 15:45:20,397 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 15 [2023-08-30 15:45:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 15:45:20,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294223168] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:45:20,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:45:20,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 21 [2023-08-30 15:45:20,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533415936] [2023-08-30 15:45:20,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:45:20,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 15:45:20,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:45:20,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 15:45:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-08-30 15:45:21,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 15:45:21,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 1921 transitions, 44684 flow. Second operand has 23 states, 23 states have (on average 114.56521739130434) internal successors, (2635), 23 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:21,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:45:21,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 15:45:21,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:45:27,800 INFO L130 PetriNetUnfolder]: 5490/10309 cut-off events. [2023-08-30 15:45:27,801 INFO L131 PetriNetUnfolder]: For 288309/288311 co-relation queries the response was YES. [2023-08-30 15:45:27,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103617 conditions, 10309 events. 5490/10309 cut-off events. For 288309/288311 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 83321 event pairs, 287 based on Foata normal form. 332/10611 useless extension candidates. Maximal degree in co-relation 103427. Up to 3017 conditions per place. [2023-08-30 15:45:27,960 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 680 selfloop transitions, 1370 changer transitions 51/2102 dead transitions. [2023-08-30 15:45:27,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 2102 transitions, 51713 flow [2023-08-30 15:45:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 15:45:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 15:45:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3802 transitions. [2023-08-30 15:45:27,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3960416666666667 [2023-08-30 15:45:27,964 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3802 transitions. [2023-08-30 15:45:27,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3802 transitions. [2023-08-30 15:45:27,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:45:27,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3802 transitions. [2023-08-30 15:45:27,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 118.8125) internal successors, (3802), 32 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:27,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 300.0) internal successors, (9900), 33 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:27,973 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 300.0) internal successors, (9900), 33 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:27,973 INFO L175 Difference]: Start difference. First operand has 637 places, 1921 transitions, 44684 flow. Second operand 32 states and 3802 transitions. [2023-08-30 15:45:27,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 2102 transitions, 51713 flow [2023-08-30 15:45:32,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 2102 transitions, 49986 flow, removed 554 selfloop flow, removed 13 redundant places. [2023-08-30 15:45:32,313 INFO L231 Difference]: Finished difference. Result has 659 places, 1909 transitions, 46649 flow [2023-08-30 15:45:32,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=41481, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=46649, PETRI_PLACES=659, PETRI_TRANSITIONS=1909} [2023-08-30 15:45:32,315 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 628 predicate places. [2023-08-30 15:45:32,315 INFO L495 AbstractCegarLoop]: Abstraction has has 659 places, 1909 transitions, 46649 flow [2023-08-30 15:45:32,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 114.56521739130434) internal successors, (2635), 23 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:32,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:45:32,316 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:45:32,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-30 15:45:32,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-30 15:45:32,516 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:45:32,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:45:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1864888131, now seen corresponding path program 14 times [2023-08-30 15:45:32,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:45:32,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501664227] [2023-08-30 15:45:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:45:32,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:45:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:45:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:45:33,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:45:33,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501664227] [2023-08-30 15:45:33,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501664227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:45:33,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061998132] [2023-08-30 15:45:33,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:45:33,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:45:33,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:45:33,094 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:45:33,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 15:45:33,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:45:33,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:45:33,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 15:45:33,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:45:33,355 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 15:45:33,433 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 15:45:33,464 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 15:45:33,753 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 15:45:33,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:45:34,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:34,271 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 178 treesize of output 118 [2023-08-30 15:45:34,353 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-30 15:45:34,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 760 treesize of output 742 [2023-08-30 15:45:34,380 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:45:34,383 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:45:34,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:34,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 243 treesize of output 288 [2023-08-30 15:45:34,516 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-30 15:45:34,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 243 treesize of output 249 [2023-08-30 15:45:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:45:40,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061998132] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:45:40,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:45:40,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-08-30 15:45:40,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202822055] [2023-08-30 15:45:40,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:45:40,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 15:45:40,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:45:40,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 15:45:40,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1108, Unknown=5, NotChecked=0, Total=1332 [2023-08-30 15:45:42,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:45:42,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 1909 transitions, 46649 flow. Second operand has 37 states, 37 states have (on average 90.21621621621621) internal successors, (3338), 37 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:42,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:45:42,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:45:42,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:45:49,990 INFO L130 PetriNetUnfolder]: 5352/10071 cut-off events. [2023-08-30 15:45:49,990 INFO L131 PetriNetUnfolder]: For 285462/285464 co-relation queries the response was YES. [2023-08-30 15:45:50,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105053 conditions, 10071 events. 5352/10071 cut-off events. For 285462/285464 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 80972 event pairs, 1737 based on Foata normal form. 2/10043 useless extension candidates. Maximal degree in co-relation 104861. Up to 8166 conditions per place. [2023-08-30 15:45:50,134 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 1879 selfloop transitions, 80 changer transitions 0/1960 dead transitions. [2023-08-30 15:45:50,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 678 places, 1960 transitions, 51200 flow [2023-08-30 15:45:50,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 15:45:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 15:45:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2048 transitions. [2023-08-30 15:45:50,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3103030303030303 [2023-08-30 15:45:50,136 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2048 transitions. [2023-08-30 15:45:50,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2048 transitions. [2023-08-30 15:45:50,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:45:50,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2048 transitions. [2023-08-30 15:45:50,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 93.0909090909091) internal successors, (2048), 22 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:50,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 300.0) internal successors, (6900), 23 states have internal predecessors, (6900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:50,141 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 300.0) internal successors, (6900), 23 states have internal predecessors, (6900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:50,141 INFO L175 Difference]: Start difference. First operand has 659 places, 1909 transitions, 46649 flow. Second operand 22 states and 2048 transitions. [2023-08-30 15:45:50,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 678 places, 1960 transitions, 51200 flow [2023-08-30 15:45:54,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 658 places, 1960 transitions, 49418 flow, removed 372 selfloop flow, removed 20 redundant places. [2023-08-30 15:45:54,747 INFO L231 Difference]: Finished difference. Result has 662 places, 1928 transitions, 45572 flow [2023-08-30 15:45:54,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=44855, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1833, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=45572, PETRI_PLACES=662, PETRI_TRANSITIONS=1928} [2023-08-30 15:45:54,748 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 631 predicate places. [2023-08-30 15:45:54,748 INFO L495 AbstractCegarLoop]: Abstraction has has 662 places, 1928 transitions, 45572 flow [2023-08-30 15:45:54,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 90.21621621621621) internal successors, (3338), 37 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:54,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:45:54,749 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:45:54,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-30 15:45:54,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-30 15:45:54,955 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:45:54,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:45:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1958759775, now seen corresponding path program 6 times [2023-08-30 15:45:54,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:45:54,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358408330] [2023-08-30 15:45:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:45:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:45:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:45:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:45:55,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:45:55,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358408330] [2023-08-30 15:45:55,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358408330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:45:55,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059574193] [2023-08-30 15:45:55,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:45:55,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:45:55,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:45:55,716 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:45:55,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 15:45:55,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 15:45:55,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:45:55,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 15:45:55,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:45:55,960 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 15:45:55,993 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 15:45:56,056 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 15:45:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:45:56,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:45:56,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:56,764 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 63 treesize of output 51 [2023-08-30 15:45:56,774 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 15:45:56,774 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 324 treesize of output 295 [2023-08-30 15:45:56,785 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:45:56,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 84 [2023-08-30 15:45:56,798 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 15:45:56,799 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 97 treesize of output 71 [2023-08-30 15:45:56,940 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 15:45:56,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059574193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:45:56,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:45:56,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-30 15:45:56,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064324062] [2023-08-30 15:45:56,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:45:56,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 15:45:56,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:45:56,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 15:45:56,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1010, Unknown=1, NotChecked=0, Total=1260 [2023-08-30 15:45:59,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:46:01,589 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 15:46:02,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 15:46:02,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 1928 transitions, 45572 flow. Second operand has 36 states, 36 states have (on average 90.25) internal successors, (3249), 36 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:02,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:46:02,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 15:46:02,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:46:09,178 WARN L222 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:46:22,606 INFO L130 PetriNetUnfolder]: 5345/10046 cut-off events. [2023-08-30 15:46:22,606 INFO L131 PetriNetUnfolder]: For 269610/269612 co-relation queries the response was YES. [2023-08-30 15:46:22,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101420 conditions, 10046 events. 5345/10046 cut-off events. For 269610/269612 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 80557 event pairs, 1621 based on Foata normal form. 38/10046 useless extension candidates. Maximal degree in co-relation 101233. Up to 8165 conditions per place. [2023-08-30 15:46:22,736 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 1701 selfloop transitions, 237 changer transitions 41/1980 dead transitions. [2023-08-30 15:46:22,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 1980 transitions, 49696 flow [2023-08-30 15:46:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 15:46:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 15:46:22,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2797 transitions. [2023-08-30 15:46:22,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31077777777777776 [2023-08-30 15:46:22,739 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2797 transitions. [2023-08-30 15:46:22,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2797 transitions. [2023-08-30 15:46:22,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:46:22,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2797 transitions. [2023-08-30 15:46:22,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 93.23333333333333) internal successors, (2797), 30 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:22,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 300.0) internal successors, (9300), 31 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:22,745 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 300.0) internal successors, (9300), 31 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:22,745 INFO L175 Difference]: Start difference. First operand has 662 places, 1928 transitions, 45572 flow. Second operand 30 states and 2797 transitions. [2023-08-30 15:46:22,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 688 places, 1980 transitions, 49696 flow [2023-08-30 15:46:26,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 672 places, 1980 transitions, 49501 flow, removed 63 selfloop flow, removed 16 redundant places. [2023-08-30 15:46:26,512 INFO L231 Difference]: Finished difference. Result has 673 places, 1904 transitions, 45382 flow [2023-08-30 15:46:26,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=45216, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1916, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=45382, PETRI_PLACES=673, PETRI_TRANSITIONS=1904} [2023-08-30 15:46:26,514 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 642 predicate places. [2023-08-30 15:46:26,514 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 1904 transitions, 45382 flow [2023-08-30 15:46:26,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 90.25) internal successors, (3249), 36 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:26,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:46:26,515 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:46:26,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-30 15:46:26,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-30 15:46:26,721 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 15:46:26,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:46:26,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2042542585, now seen corresponding path program 15 times [2023-08-30 15:46:26,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:46:26,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512692781] [2023-08-30 15:46:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:46:26,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:46:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:46:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:46:27,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:46:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512692781] [2023-08-30 15:46:27,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512692781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:46:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501302614] [2023-08-30 15:46:27,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:46:27,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:46:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:46:27,696 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:46:27,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 15:46:27,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:46:27,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:46:27,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 15:46:27,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:46:27,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:46:27,973 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 15:46:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:46:28,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:46:28,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:46:28,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 148 treesize of output 180 [2023-08-30 15:46:28,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:46:28,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 103 [2023-08-30 15:46:29,210 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 15:46:29,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501302614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:46:29,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:46:29,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2023-08-30 15:46:29,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217862598] [2023-08-30 15:46:29,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:46:29,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 15:46:29,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:46:29,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 15:46:29,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=944, Unknown=7, NotChecked=0, Total=1056 [2023-08-30 15:46:31,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 300 [2023-08-30 15:46:31,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 1904 transitions, 45382 flow. Second operand has 33 states, 33 states have (on average 85.33333333333333) internal successors, (2816), 33 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:31,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:46:31,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 300 [2023-08-30 15:46:31,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:47:28,276 WARN L222 SmtUtils]: Spent 56.66s on a formula simplification. DAG size of input: 94 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:48:25,188 WARN L222 SmtUtils]: Spent 56.78s on a formula simplification. DAG size of input: 106 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:48:27,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:48:29,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:48:31,389 WARN L539 Checker$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 15:48:33,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:48:35,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:48:37,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:48:54,104 WARN L222 SmtUtils]: Spent 16.34s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:49:50,911 WARN L222 SmtUtils]: Spent 56.68s on a formula simplification. DAG size of input: 100 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:50:47,769 WARN L222 SmtUtils]: Spent 56.80s on a formula simplification. DAG size of input: 108 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:51:44,867 WARN L222 SmtUtils]: Spent 56.78s on a formula simplification. DAG size of input: 109 DAG size of output: 92 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:52:41,587 WARN L222 SmtUtils]: Spent 56.65s on a formula simplification. DAG size of input: 114 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:52:57,927 WARN L222 SmtUtils]: Spent 16.27s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:53:00,285 WARN L539 Checker$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 15:53:02,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:53:04,384 WARN L539 Checker$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 15:54:01,630 WARN L222 SmtUtils]: Spent 56.69s on a formula simplification. DAG size of input: 120 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15