./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations 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-prod-cons.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 15:43:33,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:43:33,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:43:33,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:43:33,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:43:33,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:43:33,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:43:33,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:43:33,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:43:33,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:43:33,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:43:33,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:43:33,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:43:33,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:43:33,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:43:33,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:43:33,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:43:33,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:43:33,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:43:33,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:43:33,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:43:33,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:43:33,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:43:33,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:43:33,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:43:33,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:43:33,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:43:33,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:43:33,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:43:33,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:43:33,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:43:33,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:43:33,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:43:33,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:43:33,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:43:33,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:43:33,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:43:33,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:43:33,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:43:33,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:43:33,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:43:33,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:43:33,591 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:43:33,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:43:33,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:43:33,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:43:33,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:43:33,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:43:33,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:43:33,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:43:33,595 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:43:33,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:43:33,596 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:43:33,596 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:43:33,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:43:33,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:43:33,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:43:33,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:43:33,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:43:33,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:43:33,598 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:43:33,598 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:43:33,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:43:33,599 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:43:33,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:43:33,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:43:33,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:43:33,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:43:33,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:43:33,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:43:33,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:43:33,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:43:33,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:43:33,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:43:33,602 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:43:33,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:43:33,602 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:43:33,602 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:43:33,602 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:43:33,603 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:43:33,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:43:33,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:43:33,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:43:33,944 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:43:33,944 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:43:33,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 15:43:35,137 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:43:35,387 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:43:35,388 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 15:43:35,399 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/741f1197d/339ebdf060354cf9b191d484abc0d286/FLAG8b1ff02c7 [2023-08-30 15:43:35,421 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/741f1197d/339ebdf060354cf9b191d484abc0d286 [2023-08-30 15:43:35,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:43:35,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:43:35,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:43:35,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:43:35,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:43:35,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f15d36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35, skipping insertion in model container [2023-08-30 15:43:35,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:43:35,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:43:35,642 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-08-30 15:43:35,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:43:35,662 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:43:35,696 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-08-30 15:43:35,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:43:35,705 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:43:35,705 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:43:35,709 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:43:35,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35 WrapperNode [2023-08-30 15:43:35,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:43:35,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:43:35,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:43:35,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:43:35,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,749 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 180 [2023-08-30 15:43:35,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:43:35,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:43:35,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:43:35,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:43:35,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,773 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:43:35,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:43:35,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:43:35,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:43:35,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35" (1/1) ... [2023-08-30 15:43:35,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:43:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:35,810 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 15:43:35,834 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 15:43:35,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:43:35,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:43:35,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:43:35,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:43:35,847 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:43:35,847 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:43:35,847 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:43:35,847 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:43:35,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 15:43:35,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 15:43:35,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:43:35,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:43:35,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:43:35,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 15:43:35,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:43:35,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:43:35,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:43:35,864 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 15:43:35,963 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:43:35,964 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:43:36,218 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:43:36,405 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:43:36,406 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 15:43:36,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:43:36 BoogieIcfgContainer [2023-08-30 15:43:36,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:43:36,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:43:36,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:43:36,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:43:36,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:43:35" (1/3) ... [2023-08-30 15:43:36,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328d04e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:43:36, skipping insertion in model container [2023-08-30 15:43:36,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:43:35" (2/3) ... [2023-08-30 15:43:36,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328d04e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:43:36, skipping insertion in model container [2023-08-30 15:43:36,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:43:36" (3/3) ... [2023-08-30 15:43:36,415 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-08-30 15:43:36,422 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:43:36,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:43:36,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 15:43:36,430 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:43:36,512 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 15:43:36,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 160 transitions, 344 flow [2023-08-30 15:43:36,619 INFO L130 PetriNetUnfolder]: 11/157 cut-off events. [2023-08-30 15:43:36,620 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 15:43:36,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 157 events. 11/157 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 147 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 130. Up to 3 conditions per place. [2023-08-30 15:43:36,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 160 transitions, 344 flow [2023-08-30 15:43:36,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 136 transitions, 284 flow [2023-08-30 15:43:36,632 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:43:36,638 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 136 transitions, 284 flow [2023-08-30 15:43:36,641 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 136 transitions, 284 flow [2023-08-30 15:43:36,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 136 transitions, 284 flow [2023-08-30 15:43:36,666 INFO L130 PetriNetUnfolder]: 10/136 cut-off events. [2023-08-30 15:43:36,667 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 15:43:36,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 136 events. 10/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 130. Up to 3 conditions per place. [2023-08-30 15:43:36,669 INFO L119 LiptonReduction]: Number of co-enabled transitions 1672 [2023-08-30 15:43:41,890 INFO L134 LiptonReduction]: Checked pairs total: 3726 [2023-08-30 15:43:41,890 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-30 15:43:41,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:43:41,907 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;@973ae6c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:43:41,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-30 15:43:41,910 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 15:43:41,910 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:43:41,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:41,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 15:43:41,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:41,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:41,916 INFO L85 PathProgramCache]: Analyzing trace with hash 21239, now seen corresponding path program 1 times [2023-08-30 15:43:41,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:41,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944144769] [2023-08-30 15:43:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:41,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:42,182 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 15:43:42,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:42,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944144769] [2023-08-30 15:43:42,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944144769] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:43:42,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:43:42,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:43:42,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584461837] [2023-08-30 15:43:42,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:43:42,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:43:42,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:42,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:43:42,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:43:42,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 299 [2023-08-30 15:43:42,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:42,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:42,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 299 [2023-08-30 15:43:42,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:42,609 INFO L130 PetriNetUnfolder]: 1559/2329 cut-off events. [2023-08-30 15:43:42,610 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2023-08-30 15:43:42,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4865 conditions, 2329 events. 1559/2329 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 11415 event pairs, 1276 based on Foata normal form. 0/1459 useless extension candidates. Maximal degree in co-relation 2251. Up to 1124 conditions per place. [2023-08-30 15:43:42,657 INFO L137 encePairwiseOnDemand]: 293/299 looper letters, 49 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-30 15:43:42,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 232 flow [2023-08-30 15:43:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:43:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:43:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-30 15:43:42,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150501672240803 [2023-08-30 15:43:42,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-30 15:43:42,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-30 15:43:42,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:42,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-30 15:43:42,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:42,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:42,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:42,696 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 74 flow. Second operand 3 states and 462 transitions. [2023-08-30 15:43:42,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 232 flow [2023-08-30 15:43:42,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 15:43:42,707 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 78 flow [2023-08-30 15:43:42,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 15:43:42,713 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-30 15:43:42,716 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 78 flow [2023-08-30 15:43:42,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:42,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:42,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:43:42,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:43:42,718 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:42,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash 659002, now seen corresponding path program 1 times [2023-08-30 15:43:42,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:42,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918332390] [2023-08-30 15:43:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:42,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:42,856 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 15:43:42,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:42,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918332390] [2023-08-30 15:43:42,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918332390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:42,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758445816] [2023-08-30 15:43:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:42,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:42,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:42,860 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 15:43:42,889 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 15:43:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:42,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:43:42,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:43:43,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:43:43,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758445816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:43:43,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:43:43,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-30 15:43:43,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431391797] [2023-08-30 15:43:43,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:43:43,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:43:43,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:43:43,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 15:43:43,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 299 [2023-08-30 15:43:43,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:43,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:43,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 299 [2023-08-30 15:43:43,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:43,371 INFO L130 PetriNetUnfolder]: 1559/2328 cut-off events. [2023-08-30 15:43:43,371 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 15:43:43,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4833 conditions, 2328 events. 1559/2328 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 11328 event pairs, 1276 based on Foata normal form. 0/1461 useless extension candidates. Maximal degree in co-relation 2414. Up to 1122 conditions per place. [2023-08-30 15:43:43,383 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 48 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-30 15:43:43,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 52 transitions, 226 flow [2023-08-30 15:43:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:43:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:43:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2023-08-30 15:43:43,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49414715719063546 [2023-08-30 15:43:43,386 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2023-08-30 15:43:43,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2023-08-30 15:43:43,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:43,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2023-08-30 15:43:43,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:43,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:43,391 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:43,391 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 78 flow. Second operand 4 states and 591 transitions. [2023-08-30 15:43:43,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 52 transitions, 226 flow [2023-08-30 15:43:43,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 52 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:43:43,392 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 76 flow [2023-08-30 15:43:43,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-30 15:43:43,393 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-08-30 15:43:43,393 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 76 flow [2023-08-30 15:43:43,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:43,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:43,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 15:43:43,402 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 15:43:43,599 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 15:43:43,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:43,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:43,600 INFO L85 PathProgramCache]: Analyzing trace with hash 659000, now seen corresponding path program 1 times [2023-08-30 15:43:43,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:43,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134627164] [2023-08-30 15:43:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:43,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:43,663 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 15:43:43,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:43,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134627164] [2023-08-30 15:43:43,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134627164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:43,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014186712] [2023-08-30 15:43:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:43,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:43,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:43,666 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 15:43:43,694 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 15:43:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:43,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:43:43,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:43,744 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 15:43:43,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:43,758 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 15:43:43,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014186712] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:43:43,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:43:43,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 15:43:43,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637844810] [2023-08-30 15:43:43,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:43:43,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:43:43,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:43,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:43:43,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:43:43,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 299 [2023-08-30 15:43:43,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:43,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:43,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 299 [2023-08-30 15:43:43,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:44,451 INFO L130 PetriNetUnfolder]: 3896/5817 cut-off events. [2023-08-30 15:43:44,452 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 15:43:44,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12067 conditions, 5817 events. 3896/5817 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 32355 event pairs, 3190 based on Foata normal form. 0/3651 useless extension candidates. Maximal degree in co-relation 9647. Up to 1123 conditions per place. [2023-08-30 15:43:44,515 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 117 selfloop transitions, 5 changer transitions 0/124 dead transitions. [2023-08-30 15:43:44,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 124 transitions, 540 flow [2023-08-30 15:43:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:43:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:43:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 935 transitions. [2023-08-30 15:43:44,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211817168338907 [2023-08-30 15:43:44,519 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 935 transitions. [2023-08-30 15:43:44,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 935 transitions. [2023-08-30 15:43:44,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:44,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 935 transitions. [2023-08-30 15:43:44,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.83333333333334) internal successors, (935), 6 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:44,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:44,526 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:44,526 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 76 flow. Second operand 6 states and 935 transitions. [2023-08-30 15:43:44,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 124 transitions, 540 flow [2023-08-30 15:43:44,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 124 transitions, 537 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:43:44,529 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 109 flow [2023-08-30 15:43:44,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=109, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-30 15:43:44,530 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-30 15:43:44,530 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 109 flow [2023-08-30 15:43:44,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:44,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:44,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:43:44,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 15:43:44,736 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 15:43:44,736 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:44,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1838721127, now seen corresponding path program 1 times [2023-08-30 15:43:44,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:44,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591792325] [2023-08-30 15:43:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:44,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:44,815 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 15:43:44,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:44,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591792325] [2023-08-30 15:43:44,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591792325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:43:44,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:43:44,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:43:44,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954260812] [2023-08-30 15:43:44,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:43:44,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:43:44,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:44,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:43:44,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:43:44,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 299 [2023-08-30 15:43:44,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:44,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:44,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 299 [2023-08-30 15:43:44,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:45,264 INFO L130 PetriNetUnfolder]: 3076/4747 cut-off events. [2023-08-30 15:43:45,265 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 15:43:45,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9976 conditions, 4747 events. 3076/4747 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27333 event pairs, 1355 based on Foata normal form. 0/3197 useless extension candidates. Maximal degree in co-relation 7973. Up to 2528 conditions per place. [2023-08-30 15:43:45,292 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 41 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-30 15:43:45,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 223 flow [2023-08-30 15:43:45,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:43:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:43:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-30 15:43:45,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4927536231884058 [2023-08-30 15:43:45,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-30 15:43:45,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-30 15:43:45,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:45,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-30 15:43:45,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:45,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:45,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:45,298 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 109 flow. Second operand 3 states and 442 transitions. [2023-08-30 15:43:45,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 223 flow [2023-08-30 15:43:45,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 215 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 15:43:45,300 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 103 flow [2023-08-30 15:43:45,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-08-30 15:43:45,301 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-30 15:43:45,301 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 103 flow [2023-08-30 15:43:45,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:45,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:45,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 15:43:45,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 15:43:45,302 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:45,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:45,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1838721211, now seen corresponding path program 1 times [2023-08-30 15:43:45,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:45,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448091824] [2023-08-30 15:43:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:45,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:45,402 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 15:43:45,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:45,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448091824] [2023-08-30 15:43:45,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448091824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:43:45,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:43:45,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:43:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529093009] [2023-08-30 15:43:45,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:43:45,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:43:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:43:45,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:43:45,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 299 [2023-08-30 15:43:45,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 133.25) internal successors, (533), 4 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:45,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:45,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 299 [2023-08-30 15:43:45,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:45,849 INFO L130 PetriNetUnfolder]: 2816/4228 cut-off events. [2023-08-30 15:43:45,850 INFO L131 PetriNetUnfolder]: For 634/634 co-relation queries the response was YES. [2023-08-30 15:43:45,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9408 conditions, 4228 events. 2816/4228 cut-off events. For 634/634 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23067 event pairs, 2275 based on Foata normal form. 40/3428 useless extension candidates. Maximal degree in co-relation 9018. Up to 3915 conditions per place. [2023-08-30 15:43:45,874 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 27 selfloop transitions, 2 changer transitions 14/45 dead transitions. [2023-08-30 15:43:45,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 225 flow [2023-08-30 15:43:45,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:43:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:43:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 575 transitions. [2023-08-30 15:43:45,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2023-08-30 15:43:45,877 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 575 transitions. [2023-08-30 15:43:45,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 575 transitions. [2023-08-30 15:43:45,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:45,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 575 transitions. [2023-08-30 15:43:45,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:45,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:45,881 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:45,881 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 103 flow. Second operand 4 states and 575 transitions. [2023-08-30 15:43:45,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 225 flow [2023-08-30 15:43:45,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 219 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:43:45,884 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 121 flow [2023-08-30 15:43:45,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-08-30 15:43:45,884 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-08-30 15:43:45,885 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 121 flow [2023-08-30 15:43:45,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.25) internal successors, (533), 4 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:45,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:45,885 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 15:43:45,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 15:43:45,885 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:45,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:45,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1841919051, now seen corresponding path program 2 times [2023-08-30 15:43:45,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:45,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461678112] [2023-08-30 15:43:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:45,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:45,956 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 15:43:45,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:45,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461678112] [2023-08-30 15:43:45,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461678112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:45,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713483298] [2023-08-30 15:43:45,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:43:45,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:45,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:45,959 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 15:43:45,987 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 15:43:46,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:43:46,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:43:46,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 15:43:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:46,052 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 15:43:46,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:43:46,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713483298] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:43:46,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:43:46,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 15:43:46,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247638293] [2023-08-30 15:43:46,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:43:46,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:43:46,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:43:46,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:43:46,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 299 [2023-08-30 15:43:46,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:46,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:46,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 299 [2023-08-30 15:43:46,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:46,416 INFO L130 PetriNetUnfolder]: 2725/4062 cut-off events. [2023-08-30 15:43:46,417 INFO L131 PetriNetUnfolder]: For 271/271 co-relation queries the response was YES. [2023-08-30 15:43:46,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9681 conditions, 4062 events. 2725/4062 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 21955 event pairs, 2184 based on Foata normal form. 1/2787 useless extension candidates. Maximal degree in co-relation 9660. Up to 3914 conditions per place. [2023-08-30 15:43:46,438 INFO L137 encePairwiseOnDemand]: 297/299 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 15:43:46,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 30 transitions, 167 flow [2023-08-30 15:43:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:43:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:43:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-08-30 15:43:46,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48272017837235226 [2023-08-30 15:43:46,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-08-30 15:43:46,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-08-30 15:43:46,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:46,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-08-30 15:43:46,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:46,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:46,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:46,444 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 121 flow. Second operand 3 states and 433 transitions. [2023-08-30 15:43:46,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 30 transitions, 167 flow [2023-08-30 15:43:46,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 30 transitions, 151 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-30 15:43:46,446 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 97 flow [2023-08-30 15:43:46,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2023-08-30 15:43:46,447 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-30 15:43:46,447 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 97 flow [2023-08-30 15:43:46,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:46,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:46,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:46,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 15:43:46,661 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 15:43:46,661 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:46,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:46,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1261717240, now seen corresponding path program 1 times [2023-08-30 15:43:46,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:46,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782049188] [2023-08-30 15:43:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:46,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:46,745 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 15:43:46,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:46,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782049188] [2023-08-30 15:43:46,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782049188] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:46,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798162313] [2023-08-30 15:43:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:46,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:46,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:46,747 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 15:43:46,774 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 15:43:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:46,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:43:46,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:46,837 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 15:43:46,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:43:46,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798162313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:43:46,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:43:46,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 15:43:46,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308563927] [2023-08-30 15:43:46,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:43:46,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:43:46,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:46,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:43:46,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:43:46,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 299 [2023-08-30 15:43:46,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:46,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:46,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 299 [2023-08-30 15:43:46,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:47,079 INFO L130 PetriNetUnfolder]: 2045/3046 cut-off events. [2023-08-30 15:43:47,080 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2023-08-30 15:43:47,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7070 conditions, 3046 events. 2045/3046 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 15735 event pairs, 1576 based on Foata normal form. 0/2250 useless extension candidates. Maximal degree in co-relation 7060. Up to 2922 conditions per place. [2023-08-30 15:43:47,095 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 25 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 15:43:47,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 28 transitions, 141 flow [2023-08-30 15:43:47,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:43:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:43:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-30 15:43:47,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4816053511705686 [2023-08-30 15:43:47,097 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-30 15:43:47,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-30 15:43:47,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:47,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-30 15:43:47,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,101 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 97 flow. Second operand 3 states and 432 transitions. [2023-08-30 15:43:47,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 28 transitions, 141 flow [2023-08-30 15:43:47,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 28 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:43:47,103 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 90 flow [2023-08-30 15:43:47,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-30 15:43:47,104 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-08-30 15:43:47,104 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 90 flow [2023-08-30 15:43:47,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:47,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:47,113 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 15:43:47,309 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 15:43:47,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:47,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:47,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1261717129, now seen corresponding path program 1 times [2023-08-30 15:43:47,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:47,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794651461] [2023-08-30 15:43:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:47,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:47,346 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 15:43:47,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:47,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794651461] [2023-08-30 15:43:47,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794651461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:43:47,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:43:47,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:43:47,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538114854] [2023-08-30 15:43:47,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:43:47,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:43:47,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:47,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:43:47,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:43:47,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 299 [2023-08-30 15:43:47,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:47,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 299 [2023-08-30 15:43:47,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:47,544 INFO L130 PetriNetUnfolder]: 1461/2286 cut-off events. [2023-08-30 15:43:47,545 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-08-30 15:43:47,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5339 conditions, 2286 events. 1461/2286 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12074 event pairs, 148 based on Foata normal form. 0/1886 useless extension candidates. Maximal degree in co-relation 5328. Up to 1928 conditions per place. [2023-08-30 15:43:47,555 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 34 selfloop transitions, 2 changer transitions 2/39 dead transitions. [2023-08-30 15:43:47,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 196 flow [2023-08-30 15:43:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:43:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:43:47,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 567 transitions. [2023-08-30 15:43:47,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47408026755852845 [2023-08-30 15:43:47,558 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 567 transitions. [2023-08-30 15:43:47,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 567 transitions. [2023-08-30 15:43:47,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:47,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 567 transitions. [2023-08-30 15:43:47,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,561 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,562 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 90 flow. Second operand 4 states and 567 transitions. [2023-08-30 15:43:47,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 196 flow [2023-08-30 15:43:47,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:43:47,564 INFO L231 Difference]: Finished difference. Result has 39 places, 26 transitions, 87 flow [2023-08-30 15:43:47,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=87, PETRI_PLACES=39, PETRI_TRANSITIONS=26} [2023-08-30 15:43:47,565 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-30 15:43:47,565 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 26 transitions, 87 flow [2023-08-30 15:43:47,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:47,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:47,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 15:43:47,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:47,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:47,567 INFO L85 PathProgramCache]: Analyzing trace with hash -453850703, now seen corresponding path program 1 times [2023-08-30 15:43:47,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:47,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374281031] [2023-08-30 15:43:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:47,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:47,660 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 15:43:47,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:47,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374281031] [2023-08-30 15:43:47,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374281031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:43:47,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:43:47,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:43:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793116841] [2023-08-30 15:43:47,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:43:47,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:43:47,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:43:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:43:47,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 299 [2023-08-30 15:43:47,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:47,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 299 [2023-08-30 15:43:47,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:47,839 INFO L130 PetriNetUnfolder]: 1293/2058 cut-off events. [2023-08-30 15:43:47,839 INFO L131 PetriNetUnfolder]: For 236/236 co-relation queries the response was YES. [2023-08-30 15:43:47,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4780 conditions, 2058 events. 1293/2058 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10259 event pairs, 476 based on Foata normal form. 88/1758 useless extension candidates. Maximal degree in co-relation 4768. Up to 1553 conditions per place. [2023-08-30 15:43:47,850 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 31 selfloop transitions, 2 changer transitions 3/38 dead transitions. [2023-08-30 15:43:47,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 190 flow [2023-08-30 15:43:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:43:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:43:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-30 15:43:47,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48049052396878483 [2023-08-30 15:43:47,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-30 15:43:47,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-30 15:43:47,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:47,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-30 15:43:47,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,856 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 87 flow. Second operand 3 states and 431 transitions. [2023-08-30 15:43:47,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 190 flow [2023-08-30 15:43:47,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 187 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:43:47,857 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 102 flow [2023-08-30 15:43:47,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-30 15:43:47,858 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-30 15:43:47,859 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 102 flow [2023-08-30 15:43:47,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:47,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:47,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:47,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 15:43:47,860 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:47,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1920808828, now seen corresponding path program 1 times [2023-08-30 15:43:47,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:47,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308009286] [2023-08-30 15:43:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:47,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:48,239 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 15:43:48,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:48,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308009286] [2023-08-30 15:43:48,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308009286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:48,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960139478] [2023-08-30 15:43:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:48,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:48,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:48,241 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 15:43:48,243 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 15:43:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:48,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 15:43:48,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:48,411 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 15:43:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:43:48,478 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 15:43:48,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:43:48,552 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 15:43:48,627 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 15:43:48,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:48,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:43:48,871 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 15:43:48,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:43:48,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 157 [2023-08-30 15:43:48,895 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 15:43:48,939 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 15:43:48,971 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 15:43:48,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960139478] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:43:48,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:43:48,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2023-08-30 15:43:48,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648412670] [2023-08-30 15:43:48,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:43:48,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 15:43:48,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:48,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 15:43:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2023-08-30 15:43:51,125 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 15:43:51,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 299 [2023-08-30 15:43:51,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 102 flow. Second operand has 16 states, 16 states have (on average 99.875) internal successors, (1598), 16 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:51,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:51,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 299 [2023-08-30 15:43:51,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:53,983 INFO L130 PetriNetUnfolder]: 2187/3499 cut-off events. [2023-08-30 15:43:53,983 INFO L131 PetriNetUnfolder]: For 1181/1181 co-relation queries the response was YES. [2023-08-30 15:43:53,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9118 conditions, 3499 events. 2187/3499 cut-off events. For 1181/1181 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19506 event pairs, 824 based on Foata normal form. 0/2863 useless extension candidates. Maximal degree in co-relation 9105. Up to 1949 conditions per place. [2023-08-30 15:43:54,005 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 132 selfloop transitions, 64 changer transitions 5/203 dead transitions. [2023-08-30 15:43:54,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 203 transitions, 1092 flow [2023-08-30 15:43:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 15:43:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 15:43:54,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2662 transitions. [2023-08-30 15:43:54,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35612040133779266 [2023-08-30 15:43:54,013 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2662 transitions. [2023-08-30 15:43:54,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2662 transitions. [2023-08-30 15:43:54,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:54,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2662 transitions. [2023-08-30 15:43:54,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 106.48) internal successors, (2662), 25 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:54,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 299.0) internal successors, (7774), 26 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:54,031 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 299.0) internal successors, (7774), 26 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:54,031 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 102 flow. Second operand 25 states and 2662 transitions. [2023-08-30 15:43:54,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 203 transitions, 1092 flow [2023-08-30 15:43:54,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 203 transitions, 984 flow, removed 51 selfloop flow, removed 2 redundant places. [2023-08-30 15:43:54,041 INFO L231 Difference]: Finished difference. Result has 69 places, 88 transitions, 502 flow [2023-08-30 15:43:54,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=502, PETRI_PLACES=69, PETRI_TRANSITIONS=88} [2023-08-30 15:43:54,042 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-08-30 15:43:54,042 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 88 transitions, 502 flow [2023-08-30 15:43:54,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 99.875) internal successors, (1598), 16 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:54,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:54,043 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:54,052 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 15:43:54,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 15:43:54,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:54,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:54,252 INFO L85 PathProgramCache]: Analyzing trace with hash 483629055, now seen corresponding path program 1 times [2023-08-30 15:43:54,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:54,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832387853] [2023-08-30 15:43:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:54,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:55,117 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 15:43:55,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:55,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832387853] [2023-08-30 15:43:55,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832387853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:55,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107444698] [2023-08-30 15:43:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:55,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:55,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:55,120 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 15:43:55,148 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 15:43:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:55,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 15:43:55,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:55,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:43:55,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:43:55,394 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 15:43:55,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:55,425 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_331 (Array Int Int))) (< 0 (+ 2147483649 c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_331) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2023-08-30 15:43:55,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:43:55,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2023-08-30 15:43:55,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-08-30 15:43:55,546 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 15:43:55,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107444698] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:55,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:43:55,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 15 [2023-08-30 15:43:55,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100018639] [2023-08-30 15:43:55,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:43:55,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 15:43:55,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:55,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 15:43:55,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=201, Unknown=1, NotChecked=28, Total=272 [2023-08-30 15:43:55,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 299 [2023-08-30 15:43:55,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 88 transitions, 502 flow. Second operand has 6 states, 6 states have (on average 114.66666666666667) internal successors, (688), 6 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:55,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:55,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 299 [2023-08-30 15:43:55,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:56,024 INFO L130 PetriNetUnfolder]: 2704/4236 cut-off events. [2023-08-30 15:43:56,025 INFO L131 PetriNetUnfolder]: For 12187/12187 co-relation queries the response was YES. [2023-08-30 15:43:56,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13742 conditions, 4236 events. 2704/4236 cut-off events. For 12187/12187 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23536 event pairs, 703 based on Foata normal form. 0/3430 useless extension candidates. Maximal degree in co-relation 13721. Up to 2919 conditions per place. [2023-08-30 15:43:56,057 INFO L137 encePairwiseOnDemand]: 285/299 looper letters, 92 selfloop transitions, 47 changer transitions 3/144 dead transitions. [2023-08-30 15:43:56,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 144 transitions, 1041 flow [2023-08-30 15:43:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:43:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:43:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 623 transitions. [2023-08-30 15:43:56,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41672240802675586 [2023-08-30 15:43:56,060 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 623 transitions. [2023-08-30 15:43:56,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 623 transitions. [2023-08-30 15:43:56,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:56,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 623 transitions. [2023-08-30 15:43:56,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:56,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 299.0) internal successors, (1794), 6 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:56,065 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 299.0) internal successors, (1794), 6 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:56,065 INFO L175 Difference]: Start difference. First operand has 69 places, 88 transitions, 502 flow. Second operand 5 states and 623 transitions. [2023-08-30 15:43:56,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 144 transitions, 1041 flow [2023-08-30 15:43:56,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 144 transitions, 977 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-08-30 15:43:56,129 INFO L231 Difference]: Finished difference. Result has 71 places, 121 transitions, 814 flow [2023-08-30 15:43:56,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=814, PETRI_PLACES=71, PETRI_TRANSITIONS=121} [2023-08-30 15:43:56,130 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-08-30 15:43:56,130 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 121 transitions, 814 flow [2023-08-30 15:43:56,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 114.66666666666667) internal successors, (688), 6 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:56,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:56,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:56,149 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 15:43:56,349 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 15:43:56,350 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:56,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:56,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1914546208, now seen corresponding path program 2 times [2023-08-30 15:43:56,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:56,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172605492] [2023-08-30 15:43:56,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:56,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:56,800 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 15:43:56,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:56,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172605492] [2023-08-30 15:43:56,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172605492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:56,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641451848] [2023-08-30 15:43:56,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:43:56,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:56,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:56,802 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 15:43:56,825 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 15:43:56,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:43:56,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:43:56,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 15:43:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:57,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:43:57,009 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 15:43:57,034 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 15:43:57,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:43:57,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641451848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:43:57,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:43:57,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2023-08-30 15:43:57,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513289276] [2023-08-30 15:43:57,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:43:57,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 15:43:57,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:57,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 15:43:57,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-30 15:43:57,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 299 [2023-08-30 15:43:57,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 121 transitions, 814 flow. Second operand has 6 states, 6 states have (on average 124.66666666666667) internal successors, (748), 6 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:57,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:57,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 299 [2023-08-30 15:43:57,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:43:57,452 INFO L130 PetriNetUnfolder]: 2353/3700 cut-off events. [2023-08-30 15:43:57,452 INFO L131 PetriNetUnfolder]: For 12079/12079 co-relation queries the response was YES. [2023-08-30 15:43:57,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15015 conditions, 3700 events. 2353/3700 cut-off events. For 12079/12079 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20210 event pairs, 690 based on Foata normal form. 9/3157 useless extension candidates. Maximal degree in co-relation 14992. Up to 2351 conditions per place. [2023-08-30 15:43:57,478 INFO L137 encePairwiseOnDemand]: 293/299 looper letters, 80 selfloop transitions, 49 changer transitions 3/134 dead transitions. [2023-08-30 15:43:57,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 134 transitions, 1131 flow [2023-08-30 15:43:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:43:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:43:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 537 transitions. [2023-08-30 15:43:57,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489966555183946 [2023-08-30 15:43:57,481 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 537 transitions. [2023-08-30 15:43:57,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 537 transitions. [2023-08-30 15:43:57,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:43:57,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 537 transitions. [2023-08-30 15:43:57,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:57,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:57,485 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:57,485 INFO L175 Difference]: Start difference. First operand has 71 places, 121 transitions, 814 flow. Second operand 4 states and 537 transitions. [2023-08-30 15:43:57,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 134 transitions, 1131 flow [2023-08-30 15:43:57,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 134 transitions, 1117 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 15:43:57,517 INFO L231 Difference]: Finished difference. Result has 71 places, 115 transitions, 915 flow [2023-08-30 15:43:57,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=915, PETRI_PLACES=71, PETRI_TRANSITIONS=115} [2023-08-30 15:43:57,518 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-08-30 15:43:57,518 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 115 transitions, 915 flow [2023-08-30 15:43:57,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 124.66666666666667) internal successors, (748), 6 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:57,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:43:57,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:43:57,527 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 15:43:57,724 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 15:43:57,724 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:43:57,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:43:57,725 INFO L85 PathProgramCache]: Analyzing trace with hash 584470044, now seen corresponding path program 1 times [2023-08-30 15:43:57,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:43:57,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210299291] [2023-08-30 15:43:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:57,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:43:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:58,165 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 15:43:58,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:43:58,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210299291] [2023-08-30 15:43:58,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210299291] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:43:58,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297157293] [2023-08-30 15:43:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:43:58,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:43:58,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:43:58,169 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 15:43:58,195 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 15:43:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:43:58,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 15:43:58,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:43:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:43:58,483 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 15:43:58,512 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 15:43:58,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:43:58,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:43:58,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2023-08-30 15:43:58,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-08-30 15:43:58,778 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 15:43:58,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297157293] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:43:58,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:43:58,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-30 15:43:58,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965227549] [2023-08-30 15:43:58,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:43:58,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 15:43:58,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:43:58,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 15:43:58,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=217, Unknown=3, NotChecked=0, Total=272 [2023-08-30 15:43:59,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 299 [2023-08-30 15:43:59,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 115 transitions, 915 flow. Second operand has 17 states, 17 states have (on average 114.94117647058823) internal successors, (1954), 17 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:43:59,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:43:59,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 299 [2023-08-30 15:43:59,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:00,457 INFO L130 PetriNetUnfolder]: 3130/4862 cut-off events. [2023-08-30 15:44:00,457 INFO L131 PetriNetUnfolder]: For 15571/15571 co-relation queries the response was YES. [2023-08-30 15:44:00,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20221 conditions, 4862 events. 3130/4862 cut-off events. For 15571/15571 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 27474 event pairs, 911 based on Foata normal form. 0/4207 useless extension candidates. Maximal degree in co-relation 20197. Up to 3044 conditions per place. [2023-08-30 15:44:00,486 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 161 selfloop transitions, 71 changer transitions 3/237 dead transitions. [2023-08-30 15:44:00,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 237 transitions, 2076 flow [2023-08-30 15:44:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 15:44:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 15:44:00,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1723 transitions. [2023-08-30 15:44:00,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41161012900143334 [2023-08-30 15:44:00,491 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1723 transitions. [2023-08-30 15:44:00,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1723 transitions. [2023-08-30 15:44:00,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:00,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1723 transitions. [2023-08-30 15:44:00,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.07142857142857) internal successors, (1723), 14 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:00,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 299.0) internal successors, (4485), 15 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:00,502 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 299.0) internal successors, (4485), 15 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:00,502 INFO L175 Difference]: Start difference. First operand has 71 places, 115 transitions, 915 flow. Second operand 14 states and 1723 transitions. [2023-08-30 15:44:00,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 237 transitions, 2076 flow [2023-08-30 15:44:00,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 237 transitions, 2019 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:44:00,539 INFO L231 Difference]: Finished difference. Result has 88 places, 143 transitions, 1333 flow [2023-08-30 15:44:00,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1333, PETRI_PLACES=88, PETRI_TRANSITIONS=143} [2023-08-30 15:44:00,540 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2023-08-30 15:44:00,540 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 143 transitions, 1333 flow [2023-08-30 15:44:00,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 114.94117647058823) internal successors, (1954), 17 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:00,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:00,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:00,552 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 15:44:00,745 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 15:44:00,746 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:44:00,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:00,746 INFO L85 PathProgramCache]: Analyzing trace with hash 787644573, now seen corresponding path program 1 times [2023-08-30 15:44:00,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:00,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525912445] [2023-08-30 15:44:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:00,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:01,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:01,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525912445] [2023-08-30 15:44:01,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525912445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:01,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545109971] [2023-08-30 15:44:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:01,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:01,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:01,165 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 15:44:01,188 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 15:44:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:01,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 15:44:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:01,325 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 15:44:01,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:01,394 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 15:44:01,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:01,564 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 15:44:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:01,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:44:01,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:01,784 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 32 treesize of output 33 [2023-08-30 15:44:01,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:01,794 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 93 treesize of output 85 [2023-08-30 15:44:01,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2023-08-30 15:44:01,806 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 15:44:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:01,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545109971] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:44:01,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:44:01,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-30 15:44:01,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062801261] [2023-08-30 15:44:01,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:44:01,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 15:44:01,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:01,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 15:44:01,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=219, Unknown=2, NotChecked=0, Total=272 [2023-08-30 15:44:02,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 299 [2023-08-30 15:44:02,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 143 transitions, 1333 flow. Second operand has 17 states, 17 states have (on average 105.94117647058823) internal successors, (1801), 17 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:02,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:02,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 299 [2023-08-30 15:44:02,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:04,318 INFO L130 PetriNetUnfolder]: 3173/4876 cut-off events. [2023-08-30 15:44:04,319 INFO L131 PetriNetUnfolder]: For 22924/22996 co-relation queries the response was YES. [2023-08-30 15:44:04,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22464 conditions, 4876 events. 3173/4876 cut-off events. For 22924/22996 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26927 event pairs, 863 based on Foata normal form. 13/4210 useless extension candidates. Maximal degree in co-relation 22434. Up to 3024 conditions per place. [2023-08-30 15:44:04,349 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 164 selfloop transitions, 83 changer transitions 5/254 dead transitions. [2023-08-30 15:44:04,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 254 transitions, 2402 flow [2023-08-30 15:44:04,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 15:44:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 15:44:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2144 transitions. [2023-08-30 15:44:04,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3773983453617321 [2023-08-30 15:44:04,356 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2144 transitions. [2023-08-30 15:44:04,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2144 transitions. [2023-08-30 15:44:04,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:04,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2144 transitions. [2023-08-30 15:44:04,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 112.84210526315789) internal successors, (2144), 19 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:04,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 299.0) internal successors, (5980), 20 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:04,371 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 299.0) internal successors, (5980), 20 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:04,371 INFO L175 Difference]: Start difference. First operand has 88 places, 143 transitions, 1333 flow. Second operand 19 states and 2144 transitions. [2023-08-30 15:44:04,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 254 transitions, 2402 flow [2023-08-30 15:44:04,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 254 transitions, 2354 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-08-30 15:44:04,444 INFO L231 Difference]: Finished difference. Result has 103 places, 141 transitions, 1473 flow [2023-08-30 15:44:04,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1473, PETRI_PLACES=103, PETRI_TRANSITIONS=141} [2023-08-30 15:44:04,444 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2023-08-30 15:44:04,444 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 141 transitions, 1473 flow [2023-08-30 15:44:04,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 105.94117647058823) internal successors, (1801), 17 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:04,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:04,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:04,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 15:44:04,650 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 15:44:04,651 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:44:04,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:04,651 INFO L85 PathProgramCache]: Analyzing trace with hash 778611264, now seen corresponding path program 2 times [2023-08-30 15:44:04,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:04,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059719437] [2023-08-30 15:44:04,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:04,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:05,103 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 15:44:05,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:05,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059719437] [2023-08-30 15:44:05,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059719437] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:05,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495794945] [2023-08-30 15:44:05,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:44:05,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:05,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:05,109 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 15:44:05,138 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 15:44:05,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:44:05,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:44:05,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 15:44:05,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:05,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:05,247 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 26 treesize of output 24 [2023-08-30 15:44:05,346 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 15:44:05,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:05,388 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 15:44:05,407 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 15:44:05,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:44:05,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495794945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:44:05,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:44:05,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-30 15:44:05,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761901889] [2023-08-30 15:44:05,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:44:05,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:44:05,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:05,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:44:05,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-30 15:44:05,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 299 [2023-08-30 15:44:05,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 141 transitions, 1473 flow. Second operand has 7 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:05,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:05,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 299 [2023-08-30 15:44:05,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:05,926 INFO L130 PetriNetUnfolder]: 2623/4085 cut-off events. [2023-08-30 15:44:05,926 INFO L131 PetriNetUnfolder]: For 19443/19443 co-relation queries the response was YES. [2023-08-30 15:44:05,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19423 conditions, 4085 events. 2623/4085 cut-off events. For 19443/19443 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22119 event pairs, 618 based on Foata normal form. 0/3587 useless extension candidates. Maximal degree in co-relation 19391. Up to 2488 conditions per place. [2023-08-30 15:44:05,947 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 111 selfloop transitions, 44 changer transitions 3/160 dead transitions. [2023-08-30 15:44:05,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 160 transitions, 1900 flow [2023-08-30 15:44:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:44:05,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:44:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 528 transitions. [2023-08-30 15:44:05,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4414715719063545 [2023-08-30 15:44:05,949 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 528 transitions. [2023-08-30 15:44:05,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 528 transitions. [2023-08-30 15:44:05,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:05,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 528 transitions. [2023-08-30 15:44:05,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:05,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:05,953 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:05,953 INFO L175 Difference]: Start difference. First operand has 103 places, 141 transitions, 1473 flow. Second operand 4 states and 528 transitions. [2023-08-30 15:44:05,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 160 transitions, 1900 flow [2023-08-30 15:44:06,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 160 transitions, 1767 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-08-30 15:44:06,009 INFO L231 Difference]: Finished difference. Result has 94 places, 141 transitions, 1485 flow [2023-08-30 15:44:06,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1485, PETRI_PLACES=94, PETRI_TRANSITIONS=141} [2023-08-30 15:44:06,009 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2023-08-30 15:44:06,009 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 141 transitions, 1485 flow [2023-08-30 15:44:06,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:06,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:06,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:06,017 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 15:44:06,217 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 15:44:06,217 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:44:06,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:06,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2107600325, now seen corresponding path program 1 times [2023-08-30 15:44:06,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:06,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678182153] [2023-08-30 15:44:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:06,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:07,001 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 15:44:07,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:07,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678182153] [2023-08-30 15:44:07,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678182153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:07,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846587297] [2023-08-30 15:44:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:07,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:07,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:07,004 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 15:44:07,034 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 15:44:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:07,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 15:44:07,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:07,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:07,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 15:44:07,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:07,309 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 15:44:07,329 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 15:44:07,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:44:07,354 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_561 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_561) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) c_~d~0))) is different from false [2023-08-30 15:44:09,381 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_560 (Array Int Int)) (v_ArrVal_561 (Array Int Int))) (< 0 (+ 2147483649 c_~d~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_560) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_561) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2023-08-30 15:44:09,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:09,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2023-08-30 15:44:09,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2023-08-30 15:44:09,412 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 15:44:09,575 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 15:44:09,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846587297] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:09,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 15:44:09,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2023-08-30 15:44:09,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913351148] [2023-08-30 15:44:09,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:44:09,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:44:09,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:09,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:44:09,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=259, Unknown=2, NotChecked=66, Total=380 [2023-08-30 15:44:09,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 299 [2023-08-30 15:44:09,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 141 transitions, 1485 flow. Second operand has 7 states, 7 states have (on average 111.57142857142857) internal successors, (781), 7 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:09,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:09,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 299 [2023-08-30 15:44:09,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:11,678 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 15:44:13,773 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 15:44:14,135 INFO L130 PetriNetUnfolder]: 2897/4494 cut-off events. [2023-08-30 15:44:14,135 INFO L131 PetriNetUnfolder]: For 25014/25032 co-relation queries the response was YES. [2023-08-30 15:44:14,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21846 conditions, 4494 events. 2897/4494 cut-off events. For 25014/25032 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 24668 event pairs, 934 based on Foata normal form. 38/3993 useless extension candidates. Maximal degree in co-relation 21813. Up to 3077 conditions per place. [2023-08-30 15:44:14,160 INFO L137 encePairwiseOnDemand]: 286/299 looper letters, 117 selfloop transitions, 55 changer transitions 3/177 dead transitions. [2023-08-30 15:44:14,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 177 transitions, 2116 flow [2023-08-30 15:44:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:44:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:44:14,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 721 transitions. [2023-08-30 15:44:14,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4018952062430323 [2023-08-30 15:44:14,162 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 721 transitions. [2023-08-30 15:44:14,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 721 transitions. [2023-08-30 15:44:14,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:14,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 721 transitions. [2023-08-30 15:44:14,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.16666666666667) internal successors, (721), 6 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:14,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:14,167 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:14,167 INFO L175 Difference]: Start difference. First operand has 94 places, 141 transitions, 1485 flow. Second operand 6 states and 721 transitions. [2023-08-30 15:44:14,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 177 transitions, 2116 flow [2023-08-30 15:44:14,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 177 transitions, 2054 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 15:44:14,223 INFO L231 Difference]: Finished difference. Result has 99 places, 154 transitions, 1761 flow [2023-08-30 15:44:14,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1761, PETRI_PLACES=99, PETRI_TRANSITIONS=154} [2023-08-30 15:44:14,224 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 61 predicate places. [2023-08-30 15:44:14,224 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 154 transitions, 1761 flow [2023-08-30 15:44:14,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.57142857142857) internal successors, (781), 7 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:14,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:14,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:14,230 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 15:44:14,429 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 15:44:14,430 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:44:14,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:14,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1352820505, now seen corresponding path program 1 times [2023-08-30 15:44:14,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:14,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753323162] [2023-08-30 15:44:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:14,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:14,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:14,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753323162] [2023-08-30 15:44:14,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753323162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:14,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506358728] [2023-08-30 15:44:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:14,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:14,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:14,949 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 15:44:14,981 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 15:44:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:15,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 15:44:15,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:15,144 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 15:44:15,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:15,221 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 15:44:15,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:15,394 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 15:44:15,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:15,476 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 15:44:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:15,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:44:15,526 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_610 (Array Int Int))) (< 0 (+ 2147483649 c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_610) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2023-08-30 15:44:23,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:23,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-08-30 15:44:23,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:23,751 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 715 treesize of output 683 [2023-08-30 15:44:23,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 71 [2023-08-30 15:44:23,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 130 [2023-08-30 15:44:23,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 58 [2023-08-30 15:44:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:23,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506358728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:44:23,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:44:23,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 15:44:23,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228887457] [2023-08-30 15:44:23,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:44:23,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 15:44:23,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:23,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 15:44:23,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=4, NotChecked=34, Total=380 [2023-08-30 15:44:24,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 299 [2023-08-30 15:44:24,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 154 transitions, 1761 flow. Second operand has 20 states, 20 states have (on average 96.8) internal successors, (1936), 20 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:24,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:24,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 299 [2023-08-30 15:44:24,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:26,541 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 15:44:28,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:44:30,623 WARN L539 Checker$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 15:44:32,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:44:34,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:44:35,234 INFO L130 PetriNetUnfolder]: 2985/4623 cut-off events. [2023-08-30 15:44:35,234 INFO L131 PetriNetUnfolder]: For 28590/28632 co-relation queries the response was YES. [2023-08-30 15:44:35,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23542 conditions, 4623 events. 2985/4623 cut-off events. For 28590/28632 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25620 event pairs, 1277 based on Foata normal form. 38/4127 useless extension candidates. Maximal degree in co-relation 23507. Up to 2999 conditions per place. [2023-08-30 15:44:35,259 INFO L137 encePairwiseOnDemand]: 291/299 looper letters, 154 selfloop transitions, 47 changer transitions 4/207 dead transitions. [2023-08-30 15:44:35,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 207 transitions, 2550 flow [2023-08-30 15:44:35,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 15:44:35,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 15:44:35,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1125 transitions. [2023-08-30 15:44:35,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3420492550927334 [2023-08-30 15:44:35,261 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1125 transitions. [2023-08-30 15:44:35,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1125 transitions. [2023-08-30 15:44:35,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:35,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1125 transitions. [2023-08-30 15:44:35,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 102.27272727272727) internal successors, (1125), 11 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:35,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:35,266 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:35,266 INFO L175 Difference]: Start difference. First operand has 99 places, 154 transitions, 1761 flow. Second operand 11 states and 1125 transitions. [2023-08-30 15:44:35,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 207 transitions, 2550 flow [2023-08-30 15:44:35,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 207 transitions, 2476 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 15:44:35,339 INFO L231 Difference]: Finished difference. Result has 107 places, 156 transitions, 1858 flow [2023-08-30 15:44:35,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1858, PETRI_PLACES=107, PETRI_TRANSITIONS=156} [2023-08-30 15:44:35,340 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 69 predicate places. [2023-08-30 15:44:35,340 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 156 transitions, 1858 flow [2023-08-30 15:44:35,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 96.8) internal successors, (1936), 20 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:35,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:35,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:35,347 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 15:44:35,545 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 15:44:35,545 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:44:35,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:35,546 INFO L85 PathProgramCache]: Analyzing trace with hash 118687113, now seen corresponding path program 1 times [2023-08-30 15:44:35,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:35,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410111085] [2023-08-30 15:44:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:35,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:35,620 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 15:44:35,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:35,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410111085] [2023-08-30 15:44:35,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410111085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:44:35,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:44:35,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:44:35,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453261856] [2023-08-30 15:44:35,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:44:35,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 15:44:35,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:35,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 15:44:35,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 15:44:35,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 299 [2023-08-30 15:44:35,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 156 transitions, 1858 flow. Second operand has 4 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 15:44:35,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:35,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 299 [2023-08-30 15:44:35,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:36,260 INFO L130 PetriNetUnfolder]: 4567/7127 cut-off events. [2023-08-30 15:44:36,260 INFO L131 PetriNetUnfolder]: For 55693/55747 co-relation queries the response was YES. [2023-08-30 15:44:36,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37521 conditions, 7127 events. 4567/7127 cut-off events. For 55693/55747 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42143 event pairs, 1044 based on Foata normal form. 82/6402 useless extension candidates. Maximal degree in co-relation 37485. Up to 4336 conditions per place. [2023-08-30 15:44:36,302 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 161 selfloop transitions, 56 changer transitions 0/219 dead transitions. [2023-08-30 15:44:36,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 219 transitions, 2963 flow [2023-08-30 15:44:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:44:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:44:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 588 transitions. [2023-08-30 15:44:36,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4916387959866221 [2023-08-30 15:44:36,304 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 588 transitions. [2023-08-30 15:44:36,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 588 transitions. [2023-08-30 15:44:36,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:36,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 588 transitions. [2023-08-30 15:44:36,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:36,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:36,306 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:36,306 INFO L175 Difference]: Start difference. First operand has 107 places, 156 transitions, 1858 flow. Second operand 4 states and 588 transitions. [2023-08-30 15:44:36,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 219 transitions, 2963 flow [2023-08-30 15:44:36,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 219 transitions, 2862 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-08-30 15:44:36,404 INFO L231 Difference]: Finished difference. Result has 106 places, 179 transitions, 2387 flow [2023-08-30 15:44:36,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2387, PETRI_PLACES=106, PETRI_TRANSITIONS=179} [2023-08-30 15:44:36,405 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 68 predicate places. [2023-08-30 15:44:36,405 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 179 transitions, 2387 flow [2023-08-30 15:44:36,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 15:44:36,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:36,406 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:36,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 15:44:36,406 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:44:36,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:36,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1913459105, now seen corresponding path program 2 times [2023-08-30 15:44:36,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:36,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913039549] [2023-08-30 15:44:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:36,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:36,930 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 15:44:36,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:36,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913039549] [2023-08-30 15:44:36,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913039549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:36,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311150245] [2023-08-30 15:44:36,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:44:36,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:36,932 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 15:44:36,937 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 15:44:37,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:44:37,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:44:37,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 15:44:37,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:37,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:37,167 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 15:44:37,185 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 15:44:37,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:44:37,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311150245] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:44:37,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:44:37,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-30 15:44:37,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834468238] [2023-08-30 15:44:37,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:44:37,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 15:44:37,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:37,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 15:44:37,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:44:37,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 299 [2023-08-30 15:44:37,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 179 transitions, 2387 flow. Second operand has 6 states, 6 states have (on average 124.83333333333333) internal successors, (749), 6 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:37,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:37,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 299 [2023-08-30 15:44:37,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:38,001 INFO L130 PetriNetUnfolder]: 4638/7316 cut-off events. [2023-08-30 15:44:38,002 INFO L131 PetriNetUnfolder]: For 71691/71691 co-relation queries the response was YES. [2023-08-30 15:44:38,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40220 conditions, 7316 events. 4638/7316 cut-off events. For 71691/71691 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 43867 event pairs, 1454 based on Foata normal form. 76/6575 useless extension candidates. Maximal degree in co-relation 40182. Up to 5298 conditions per place. [2023-08-30 15:44:38,036 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 156 selfloop transitions, 39 changer transitions 3/200 dead transitions. [2023-08-30 15:44:38,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 200 transitions, 2934 flow [2023-08-30 15:44:38,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 15:44:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 15:44:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 537 transitions. [2023-08-30 15:44:38,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489966555183946 [2023-08-30 15:44:38,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 537 transitions. [2023-08-30 15:44:38,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 537 transitions. [2023-08-30 15:44:38,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:38,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 537 transitions. [2023-08-30 15:44:38,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:38,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:38,042 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:38,042 INFO L175 Difference]: Start difference. First operand has 106 places, 179 transitions, 2387 flow. Second operand 4 states and 537 transitions. [2023-08-30 15:44:38,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 200 transitions, 2934 flow [2023-08-30 15:44:38,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 200 transitions, 2847 flow, removed 39 selfloop flow, removed 1 redundant places. [2023-08-30 15:44:38,162 INFO L231 Difference]: Finished difference. Result has 109 places, 179 transitions, 2454 flow [2023-08-30 15:44:38,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2454, PETRI_PLACES=109, PETRI_TRANSITIONS=179} [2023-08-30 15:44:38,163 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 71 predicate places. [2023-08-30 15:44:38,163 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 179 transitions, 2454 flow [2023-08-30 15:44:38,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 124.83333333333333) internal successors, (749), 6 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:38,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:38,163 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:38,168 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 15:44:38,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:38,364 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:44:38,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:38,364 INFO L85 PathProgramCache]: Analyzing trace with hash 365621501, now seen corresponding path program 2 times [2023-08-30 15:44:38,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:38,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028613873] [2023-08-30 15:44:38,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:38,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:39,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:39,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028613873] [2023-08-30 15:44:39,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028613873] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:39,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326010229] [2023-08-30 15:44:39,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:44:39,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:39,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:39,423 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 15:44:39,424 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 15:44:39,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:44:39,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:44:39,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 15:44:39,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:39,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:39,644 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 15:44:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:44:39,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:44:39,691 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_730 (Array Int Int))) (< 0 (+ 2147483649 c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_730) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2023-08-30 15:44:39,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:39,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2023-08-30 15:44:39,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-08-30 15:44:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-30 15:44:39,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326010229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:44:39,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:44:39,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 17 [2023-08-30 15:44:39,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679143176] [2023-08-30 15:44:39,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:44:39,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 15:44:39,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:39,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 15:44:39,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=258, Unknown=1, NotChecked=32, Total=342 [2023-08-30 15:44:39,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 299 [2023-08-30 15:44:39,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 179 transitions, 2454 flow. Second operand has 19 states, 19 states have (on average 99.94736842105263) internal successors, (1899), 19 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:39,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:39,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 299 [2023-08-30 15:44:39,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:41,427 INFO L130 PetriNetUnfolder]: 4628/7281 cut-off events. [2023-08-30 15:44:41,427 INFO L131 PetriNetUnfolder]: For 53051/53051 co-relation queries the response was YES. [2023-08-30 15:44:41,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38133 conditions, 7281 events. 4628/7281 cut-off events. For 53051/53051 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 43363 event pairs, 1584 based on Foata normal form. 10/6474 useless extension candidates. Maximal degree in co-relation 38093. Up to 5704 conditions per place. [2023-08-30 15:44:41,475 INFO L137 encePairwiseOnDemand]: 292/299 looper letters, 154 selfloop transitions, 88 changer transitions 12/256 dead transitions. [2023-08-30 15:44:41,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 256 transitions, 3553 flow [2023-08-30 15:44:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 15:44:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 15:44:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1473 transitions. [2023-08-30 15:44:41,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35188724319159104 [2023-08-30 15:44:41,477 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1473 transitions. [2023-08-30 15:44:41,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1473 transitions. [2023-08-30 15:44:41,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:41,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1473 transitions. [2023-08-30 15:44:41,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 105.21428571428571) internal successors, (1473), 14 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:41,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 299.0) internal successors, (4485), 15 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:41,550 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 299.0) internal successors, (4485), 15 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:41,550 INFO L175 Difference]: Start difference. First operand has 109 places, 179 transitions, 2454 flow. Second operand 14 states and 1473 transitions. [2023-08-30 15:44:41,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 256 transitions, 3553 flow [2023-08-30 15:44:41,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 256 transitions, 3505 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 15:44:41,667 INFO L231 Difference]: Finished difference. Result has 121 places, 190 transitions, 2778 flow [2023-08-30 15:44:41,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2778, PETRI_PLACES=121, PETRI_TRANSITIONS=190} [2023-08-30 15:44:41,667 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 83 predicate places. [2023-08-30 15:44:41,667 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 190 transitions, 2778 flow [2023-08-30 15:44:41,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 99.94736842105263) internal successors, (1899), 19 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:41,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:41,668 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:41,672 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 15:44:41,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:41,868 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:44:41,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:41,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2097893459, now seen corresponding path program 1 times [2023-08-30 15:44:41,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:41,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818435833] [2023-08-30 15:44:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:41,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:41,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:41,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818435833] [2023-08-30 15:44:41,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818435833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:41,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718566549] [2023-08-30 15:44:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:41,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:41,968 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 15:44:41,970 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 15:44:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:42,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 15:44:42,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:42,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:44:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:42,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718566549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:44:42,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:44:42,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 15:44:42,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917337855] [2023-08-30 15:44:42,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:44:42,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 15:44:42,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:42,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 15:44:42,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 15:44:42,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 299 [2023-08-30 15:44:42,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 190 transitions, 2778 flow. Second operand has 12 states, 12 states have (on average 130.33333333333334) internal successors, (1564), 12 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:42,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:42,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 299 [2023-08-30 15:44:42,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:42,993 INFO L130 PetriNetUnfolder]: 3327/5356 cut-off events. [2023-08-30 15:44:42,993 INFO L131 PetriNetUnfolder]: For 46741/46741 co-relation queries the response was YES. [2023-08-30 15:44:43,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29081 conditions, 5356 events. 3327/5356 cut-off events. For 46741/46741 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 31603 event pairs, 1818 based on Foata normal form. 83/4832 useless extension candidates. Maximal degree in co-relation 29040. Up to 4379 conditions per place. [2023-08-30 15:44:43,026 INFO L137 encePairwiseOnDemand]: 295/299 looper letters, 114 selfloop transitions, 3 changer transitions 57/176 dead transitions. [2023-08-30 15:44:43,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 176 transitions, 2775 flow [2023-08-30 15:44:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:44:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:44:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 818 transitions. [2023-08-30 15:44:43,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559643255295429 [2023-08-30 15:44:43,029 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 818 transitions. [2023-08-30 15:44:43,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 818 transitions. [2023-08-30 15:44:43,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:43,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 818 transitions. [2023-08-30 15:44:43,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.33333333333334) internal successors, (818), 6 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:43,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:43,032 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:43,032 INFO L175 Difference]: Start difference. First operand has 121 places, 190 transitions, 2778 flow. Second operand 6 states and 818 transitions. [2023-08-30 15:44:43,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 176 transitions, 2775 flow [2023-08-30 15:44:43,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 176 transitions, 2536 flow, removed 27 selfloop flow, removed 13 redundant places. [2023-08-30 15:44:43,189 INFO L231 Difference]: Finished difference. Result has 103 places, 119 transitions, 1624 flow [2023-08-30 15:44:43,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1624, PETRI_PLACES=103, PETRI_TRANSITIONS=119} [2023-08-30 15:44:43,189 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2023-08-30 15:44:43,189 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 119 transitions, 1624 flow [2023-08-30 15:44:43,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 130.33333333333334) internal successors, (1564), 12 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:43,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:43,190 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:43,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 15:44:43,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:43,391 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:44:43,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:43,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1550633849, now seen corresponding path program 2 times [2023-08-30 15:44:43,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:43,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855760483] [2023-08-30 15:44:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:43,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:44:44,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:44,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855760483] [2023-08-30 15:44:44,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855760483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:44,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34791907] [2023-08-30 15:44:44,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:44:44,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:44,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:44,470 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 15:44:44,472 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 15:44:44,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:44:44,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:44:44,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 15:44:44,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:44,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:44,786 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 15:44:44,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:44,832 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 15:44:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:44:44,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:44:46,944 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_823 (Array Int Int)) (v_ArrVal_824 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_823) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_824) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 2147483649 c_~d~0))) is different from false [2023-08-30 15:44:46,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:46,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2023-08-30 15:44:46,963 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 38 treesize of output 32 [2023-08-30 15:44:46,967 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 66 treesize of output 54 [2023-08-30 15:44:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-30 15:44:47,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34791907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:44:47,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:44:47,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 20 [2023-08-30 15:44:47,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143245112] [2023-08-30 15:44:47,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:44:47,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 15:44:47,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 15:44:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=355, Unknown=2, NotChecked=38, Total=462 [2023-08-30 15:44:47,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 299 [2023-08-30 15:44:47,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 119 transitions, 1624 flow. Second operand has 22 states, 22 states have (on average 96.81818181818181) internal successors, (2130), 22 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:47,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:47,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 299 [2023-08-30 15:44:47,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:48,656 INFO L130 PetriNetUnfolder]: 2785/4488 cut-off events. [2023-08-30 15:44:48,656 INFO L131 PetriNetUnfolder]: For 34013/34133 co-relation queries the response was YES. [2023-08-30 15:44:48,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23016 conditions, 4488 events. 2785/4488 cut-off events. For 34013/34133 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 25122 event pairs, 1016 based on Foata normal form. 90/4056 useless extension candidates. Maximal degree in co-relation 22976. Up to 2820 conditions per place. [2023-08-30 15:44:48,683 INFO L137 encePairwiseOnDemand]: 293/299 looper letters, 110 selfloop transitions, 57 changer transitions 13/182 dead transitions. [2023-08-30 15:44:48,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 182 transitions, 2390 flow [2023-08-30 15:44:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 15:44:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 15:44:48,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1134 transitions. [2023-08-30 15:44:48,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447856491334752 [2023-08-30 15:44:48,686 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1134 transitions. [2023-08-30 15:44:48,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1134 transitions. [2023-08-30 15:44:48,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:44:48,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1134 transitions. [2023-08-30 15:44:48,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 103.0909090909091) internal successors, (1134), 11 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:48,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:48,691 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:48,691 INFO L175 Difference]: Start difference. First operand has 103 places, 119 transitions, 1624 flow. Second operand 11 states and 1134 transitions. [2023-08-30 15:44:48,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 182 transitions, 2390 flow [2023-08-30 15:44:48,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 182 transitions, 2324 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-08-30 15:44:48,748 INFO L231 Difference]: Finished difference. Result has 91 places, 120 transitions, 1734 flow [2023-08-30 15:44:48,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1734, PETRI_PLACES=91, PETRI_TRANSITIONS=120} [2023-08-30 15:44:48,749 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2023-08-30 15:44:48,749 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 120 transitions, 1734 flow [2023-08-30 15:44:48,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 96.81818181818181) internal successors, (2130), 22 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:48,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:44:48,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:44:48,757 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 15:44:48,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 15:44:48,955 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:44:48,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:44:48,955 INFO L85 PathProgramCache]: Analyzing trace with hash 203769688, now seen corresponding path program 1 times [2023-08-30 15:44:48,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:44:48,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380300827] [2023-08-30 15:44:48,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:48,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:44:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:49,497 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 15:44:49,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:44:49,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380300827] [2023-08-30 15:44:49,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380300827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:44:49,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858918061] [2023-08-30 15:44:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:44:49,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:44:49,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:44:49,501 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 15:44:49,527 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 15:44:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:44:49,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 15:44:49,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:44:49,676 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 15:44:49,725 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 30 treesize of output 29 [2023-08-30 15:44:49,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:49,808 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 23 [2023-08-30 15:44:49,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:44:49,907 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 23 [2023-08-30 15:44:50,168 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 15:44:50,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:44:50,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:50,628 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 116 treesize of output 81 [2023-08-30 15:44:50,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:50,657 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 203 treesize of output 215 [2023-08-30 15:44:50,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:50,676 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 164 treesize of output 142 [2023-08-30 15:44:50,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:44:50,693 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 95 treesize of output 93 [2023-08-30 15:44:52,342 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 15:44:52,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858918061] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:44:52,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:44:52,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-30 15:44:52,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739941081] [2023-08-30 15:44:52,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:44:52,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 15:44:52,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:44:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 15:44:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=655, Unknown=2, NotChecked=0, Total=756 [2023-08-30 15:44:53,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-08-30 15:44:53,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 120 transitions, 1734 flow. Second operand has 28 states, 28 states have (on average 98.60714285714286) internal successors, (2761), 28 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:44:53,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:44:53,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-08-30 15:44:53,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:44:57,645 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 15:44:59,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:45:01,730 WARN L539 Checker$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 15:45:03,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:45:08,355 WARN L539 Checker$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 15:45:10,371 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 15:45:10,955 INFO L130 PetriNetUnfolder]: 4817/7588 cut-off events. [2023-08-30 15:45:10,956 INFO L131 PetriNetUnfolder]: For 45389/45407 co-relation queries the response was YES. [2023-08-30 15:45:10,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36877 conditions, 7588 events. 4817/7588 cut-off events. For 45389/45407 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 46160 event pairs, 1354 based on Foata normal form. 132/6725 useless extension candidates. Maximal degree in co-relation 36844. Up to 4479 conditions per place. [2023-08-30 15:45:10,991 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 260 selfloop transitions, 140 changer transitions 11/413 dead transitions. [2023-08-30 15:45:10,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 413 transitions, 4640 flow [2023-08-30 15:45:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 15:45:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 15:45:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3507 transitions. [2023-08-30 15:45:10,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35542718151413805 [2023-08-30 15:45:10,995 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3507 transitions. [2023-08-30 15:45:10,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3507 transitions. [2023-08-30 15:45:10,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:45:10,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3507 transitions. [2023-08-30 15:45:11,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 106.27272727272727) internal successors, (3507), 33 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:11,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 299.0) internal successors, (10166), 34 states have internal predecessors, (10166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:11,010 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 299.0) internal successors, (10166), 34 states have internal predecessors, (10166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:11,010 INFO L175 Difference]: Start difference. First operand has 91 places, 120 transitions, 1734 flow. Second operand 33 states and 3507 transitions. [2023-08-30 15:45:11,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 413 transitions, 4640 flow [2023-08-30 15:45:11,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 413 transitions, 4470 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-08-30 15:45:11,051 INFO L231 Difference]: Finished difference. Result has 119 places, 223 transitions, 3131 flow [2023-08-30 15:45:11,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3131, PETRI_PLACES=119, PETRI_TRANSITIONS=223} [2023-08-30 15:45:11,052 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 81 predicate places. [2023-08-30 15:45:11,052 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 223 transitions, 3131 flow [2023-08-30 15:45:11,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.60714285714286) internal successors, (2761), 28 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:11,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:45:11,053 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:45:11,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 15:45:11,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:45:11,257 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:45:11,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:45:11,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1866153395, now seen corresponding path program 2 times [2023-08-30 15:45:11,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:45:11,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790201695] [2023-08-30 15:45:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:45:11,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:45:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:45:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:45:12,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:45:12,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790201695] [2023-08-30 15:45:12,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790201695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:45:12,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407687775] [2023-08-30 15:45:12,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:45:12,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:45:12,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:45:12,085 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 15:45:12,092 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 15:45:12,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:45:12,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:45:12,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 15:45:12,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:45:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:45:12,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:45:12,695 INFO L321 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2023-08-30 15:45:12,696 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 41 [2023-08-30 15:45:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:45:12,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407687775] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:45:12,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:45:12,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 21 [2023-08-30 15:45:12,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874407979] [2023-08-30 15:45:12,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:45:12,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 15:45:12,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:45:12,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 15:45:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-08-30 15:45:14,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 299 [2023-08-30 15:45:14,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 223 transitions, 3131 flow. Second operand has 23 states, 23 states have (on average 120.0) internal successors, (2760), 23 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:14,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:45:14,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 299 [2023-08-30 15:45:14,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:45:17,274 INFO L130 PetriNetUnfolder]: 8671/13926 cut-off events. [2023-08-30 15:45:17,274 INFO L131 PetriNetUnfolder]: For 86727/86763 co-relation queries the response was YES. [2023-08-30 15:45:17,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70139 conditions, 13926 events. 8671/13926 cut-off events. For 86727/86763 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 94765 event pairs, 1189 based on Foata normal form. 0/12274 useless extension candidates. Maximal degree in co-relation 70103. Up to 8011 conditions per place. [2023-08-30 15:45:17,458 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 353 selfloop transitions, 269 changer transitions 9/633 dead transitions. [2023-08-30 15:45:17,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 633 transitions, 7795 flow [2023-08-30 15:45:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 15:45:17,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 15:45:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4367 transitions. [2023-08-30 15:45:17,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4295691520755459 [2023-08-30 15:45:17,462 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4367 transitions. [2023-08-30 15:45:17,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4367 transitions. [2023-08-30 15:45:17,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:45:17,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4367 transitions. [2023-08-30 15:45:17,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 128.44117647058823) internal successors, (4367), 34 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:17,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 299.0) internal successors, (10465), 35 states have internal predecessors, (10465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:17,477 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 299.0) internal successors, (10465), 35 states have internal predecessors, (10465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:17,477 INFO L175 Difference]: Start difference. First operand has 119 places, 223 transitions, 3131 flow. Second operand 34 states and 4367 transitions. [2023-08-30 15:45:17,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 633 transitions, 7795 flow [2023-08-30 15:45:17,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 633 transitions, 6545 flow, removed 612 selfloop flow, removed 8 redundant places. [2023-08-30 15:45:17,603 INFO L231 Difference]: Finished difference. Result has 157 places, 404 transitions, 5190 flow [2023-08-30 15:45:17,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5190, PETRI_PLACES=157, PETRI_TRANSITIONS=404} [2023-08-30 15:45:17,604 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 119 predicate places. [2023-08-30 15:45:17,604 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 404 transitions, 5190 flow [2023-08-30 15:45:17,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 120.0) internal successors, (2760), 23 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:17,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:45:17,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:45:17,611 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 15:45:17,808 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 15:45:17,809 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:45:17,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:45:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1692522058, now seen corresponding path program 2 times [2023-08-30 15:45:17,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:45:17,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561587224] [2023-08-30 15:45:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:45:17,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:45:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:45:18,157 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 15:45:18,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:45:18,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561587224] [2023-08-30 15:45:18,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561587224] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:45:18,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144969001] [2023-08-30 15:45:18,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:45:18,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:45:18,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:45:18,161 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 15:45:18,190 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 15:45:18,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:45:18,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:45:18,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 15:45:18,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:45:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:45:18,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:45:18,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:18,668 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 15:45:19,004 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 15:45:19,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144969001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:45:19,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:45:19,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-30 15:45:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936370690] [2023-08-30 15:45:19,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:45:19,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 15:45:19,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:45:19,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 15:45:19,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2023-08-30 15:45:19,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 299 [2023-08-30 15:45:19,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 404 transitions, 5190 flow. Second operand has 26 states, 26 states have (on average 119.73076923076923) internal successors, (3113), 26 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:19,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:45:19,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 299 [2023-08-30 15:45:19,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:45:22,023 INFO L130 PetriNetUnfolder]: 7906/13105 cut-off events. [2023-08-30 15:45:22,023 INFO L131 PetriNetUnfolder]: For 101176/101176 co-relation queries the response was YES. [2023-08-30 15:45:22,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67717 conditions, 13105 events. 7906/13105 cut-off events. For 101176/101176 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 94313 event pairs, 3112 based on Foata normal form. 445/12045 useless extension candidates. Maximal degree in co-relation 67668. Up to 8131 conditions per place. [2023-08-30 15:45:22,202 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 341 selfloop transitions, 89 changer transitions 27/459 dead transitions. [2023-08-30 15:45:22,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 459 transitions, 6290 flow [2023-08-30 15:45:22,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 15:45:22,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 15:45:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2664 transitions. [2023-08-30 15:45:22,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42427138079311993 [2023-08-30 15:45:22,207 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2664 transitions. [2023-08-30 15:45:22,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2664 transitions. [2023-08-30 15:45:22,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:45:22,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2664 transitions. [2023-08-30 15:45:22,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 126.85714285714286) internal successors, (2664), 21 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:22,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 299.0) internal successors, (6578), 22 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:22,217 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 299.0) internal successors, (6578), 22 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:22,217 INFO L175 Difference]: Start difference. First operand has 157 places, 404 transitions, 5190 flow. Second operand 21 states and 2664 transitions. [2023-08-30 15:45:22,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 459 transitions, 6290 flow [2023-08-30 15:45:22,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 459 transitions, 5570 flow, removed 321 selfloop flow, removed 9 redundant places. [2023-08-30 15:45:22,521 INFO L231 Difference]: Finished difference. Result has 170 places, 323 transitions, 4308 flow [2023-08-30 15:45:22,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=3594, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4308, PETRI_PLACES=170, PETRI_TRANSITIONS=323} [2023-08-30 15:45:22,522 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 132 predicate places. [2023-08-30 15:45:22,522 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 323 transitions, 4308 flow [2023-08-30 15:45:22,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 119.73076923076923) internal successors, (3113), 26 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:22,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:45:22,523 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:45:22,528 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 15:45:22,723 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 15:45:22,724 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:45:22,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:45:22,724 INFO L85 PathProgramCache]: Analyzing trace with hash 168712406, now seen corresponding path program 3 times [2023-08-30 15:45:22,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:45:22,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112912994] [2023-08-30 15:45:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:45:22,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:45:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:45:23,326 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 15:45:23,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:45:23,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112912994] [2023-08-30 15:45:23,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112912994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:45:23,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702041030] [2023-08-30 15:45:23,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:45:23,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:45:23,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:45:23,328 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 15:45:23,329 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 15:45:23,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:45:23,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:45:23,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 15:45:23,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:45:23,511 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 15:45:23,542 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 15:45:23,634 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 15:45:23,839 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 15:45:23,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:45:24,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:24,420 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 15:45:24,465 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 15:45:24,465 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 257 [2023-08-30 15:45:24,512 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 15:45:24,513 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 221 treesize of output 207 [2023-08-30 15:45:24,561 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 15:45:24,562 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 144 treesize of output 155 [2023-08-30 15:45:27,096 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 15:45:27,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702041030] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:45:27,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:45:27,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 15:45:27,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004433276] [2023-08-30 15:45:27,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:45:27,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:45:27,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:45:27,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:45:27,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=683, Unknown=2, NotChecked=0, Total=812 [2023-08-30 15:45:27,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-08-30 15:45:27,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 323 transitions, 4308 flow. Second operand has 29 states, 29 states have (on average 98.55172413793103) internal successors, (2858), 29 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:27,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:45:27,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-08-30 15:45:27,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:45:30,427 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 15:45:32,486 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 15:45:38,296 INFO L130 PetriNetUnfolder]: 8000/13368 cut-off events. [2023-08-30 15:45:38,296 INFO L131 PetriNetUnfolder]: For 112897/112897 co-relation queries the response was YES. [2023-08-30 15:45:38,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68465 conditions, 13368 events. 8000/13368 cut-off events. For 112897/112897 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 97442 event pairs, 3406 based on Foata normal form. 60/12044 useless extension candidates. Maximal degree in co-relation 68408. Up to 9095 conditions per place. [2023-08-30 15:45:38,524 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 418 selfloop transitions, 110 changer transitions 57/587 dead transitions. [2023-08-30 15:45:38,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 587 transitions, 7135 flow [2023-08-30 15:45:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 15:45:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 15:45:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4205 transitions. [2023-08-30 15:45:38,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3515886287625418 [2023-08-30 15:45:38,535 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4205 transitions. [2023-08-30 15:45:38,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4205 transitions. [2023-08-30 15:45:38,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:45:38,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4205 transitions. [2023-08-30 15:45:38,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 105.125) internal successors, (4205), 40 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:38,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 299.0) internal successors, (12259), 41 states have internal predecessors, (12259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:38,552 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 299.0) internal successors, (12259), 41 states have internal predecessors, (12259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:38,553 INFO L175 Difference]: Start difference. First operand has 170 places, 323 transitions, 4308 flow. Second operand 40 states and 4205 transitions. [2023-08-30 15:45:38,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 587 transitions, 7135 flow [2023-08-30 15:45:39,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 587 transitions, 6879 flow, removed 104 selfloop flow, removed 8 redundant places. [2023-08-30 15:45:39,012 INFO L231 Difference]: Finished difference. Result has 205 places, 343 transitions, 4812 flow [2023-08-30 15:45:39,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4812, PETRI_PLACES=205, PETRI_TRANSITIONS=343} [2023-08-30 15:45:39,013 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 167 predicate places. [2023-08-30 15:45:39,013 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 343 transitions, 4812 flow [2023-08-30 15:45:39,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 98.55172413793103) internal successors, (2858), 29 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:39,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:45:39,013 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:45:39,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-30 15:45:39,214 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 15:45:39,214 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:45:39,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:45:39,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1742309496, now seen corresponding path program 3 times [2023-08-30 15:45:39,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:45:39,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465863249] [2023-08-30 15:45:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:45:39,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:45:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:45:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:45:39,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:45:39,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465863249] [2023-08-30 15:45:39,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465863249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:45:39,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437118031] [2023-08-30 15:45:39,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:45:39,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:45:39,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:45:39,903 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 15:45:39,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 15:45:40,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:45:40,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:45:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 15:45:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:45:40,089 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 15:45:40,124 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 15:45:40,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:45:40,259 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 15:45:40,410 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 15:45:40,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:45:40,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:40,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-08-30 15:45:40,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:40,879 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 112 treesize of output 105 [2023-08-30 15:45:40,887 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 71 treesize of output 57 [2023-08-30 15:45:40,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:40,901 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 56 treesize of output 53 [2023-08-30 15:45:41,124 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 15:45:41,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437118031] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:45:41,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:45:41,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 15:45:41,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572642305] [2023-08-30 15:45:41,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:45:41,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:45:41,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:45:41,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:45:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=659, Unknown=1, NotChecked=0, Total=812 [2023-08-30 15:45:42,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-08-30 15:45:42,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 343 transitions, 4812 flow. Second operand has 29 states, 29 states have (on average 98.55172413793103) internal successors, (2858), 29 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:42,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:45:42,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-08-30 15:45:42,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:45:47,485 INFO L130 PetriNetUnfolder]: 9169/15358 cut-off events. [2023-08-30 15:45:47,485 INFO L131 PetriNetUnfolder]: For 155140/155170 co-relation queries the response was YES. [2023-08-30 15:45:47,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80988 conditions, 15358 events. 9169/15358 cut-off events. For 155140/155170 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 114750 event pairs, 3271 based on Foata normal form. 157/13946 useless extension candidates. Maximal degree in co-relation 80927. Up to 9145 conditions per place. [2023-08-30 15:45:47,611 INFO L137 encePairwiseOnDemand]: 290/299 looper letters, 400 selfloop transitions, 171 changer transitions 6/579 dead transitions. [2023-08-30 15:45:47,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 579 transitions, 7982 flow [2023-08-30 15:45:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 15:45:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 15:45:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3076 transitions. [2023-08-30 15:45:47,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3547457040710414 [2023-08-30 15:45:47,615 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3076 transitions. [2023-08-30 15:45:47,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3076 transitions. [2023-08-30 15:45:47,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:45:47,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3076 transitions. [2023-08-30 15:45:47,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 106.06896551724138) internal successors, (3076), 29 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:47,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 299.0) internal successors, (8970), 30 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:47,627 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 299.0) internal successors, (8970), 30 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:47,627 INFO L175 Difference]: Start difference. First operand has 205 places, 343 transitions, 4812 flow. Second operand 29 states and 3076 transitions. [2023-08-30 15:45:47,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 579 transitions, 7982 flow [2023-08-30 15:45:48,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 579 transitions, 7413 flow, removed 240 selfloop flow, removed 16 redundant places. [2023-08-30 15:45:48,262 INFO L231 Difference]: Finished difference. Result has 221 places, 406 transitions, 5983 flow [2023-08-30 15:45:48,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=4492, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5983, PETRI_PLACES=221, PETRI_TRANSITIONS=406} [2023-08-30 15:45:48,263 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 183 predicate places. [2023-08-30 15:45:48,263 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 406 transitions, 5983 flow [2023-08-30 15:45:48,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 98.55172413793103) internal successors, (2858), 29 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:48,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:45:48,264 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:45:48,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-30 15:45:48,464 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 15:45:48,465 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:45:48,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:45:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1898897376, now seen corresponding path program 1 times [2023-08-30 15:45:48,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:45:48,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293307049] [2023-08-30 15:45:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:45:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:45:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:45:49,215 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 15:45:49,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:45:49,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293307049] [2023-08-30 15:45:49,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293307049] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:45:49,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540227409] [2023-08-30 15:45:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:45:49,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:45:49,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:45:49,218 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 15:45:49,222 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 15:45:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:45:49,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 15:45:49,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:45:49,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:45:49,513 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 15:45:49,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 [2023-08-30 15:45:49,721 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 15:45:49,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:45:49,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:49,752 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 15:45:50,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:50,011 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 53 treesize of output 45 [2023-08-30 15:45:50,019 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 15:45:50,454 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 15:45:50,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540227409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:45:50,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:45:50,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-08-30 15:45:50,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164985045] [2023-08-30 15:45:50,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:45:50,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 15:45:50,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:45:50,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 15:45:50,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=740, Unknown=3, NotChecked=0, Total=870 [2023-08-30 15:45:51,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 15:45:51,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 406 transitions, 5983 flow. Second operand has 30 states, 30 states have (on average 101.6) internal successors, (3048), 30 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:51,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:45:51,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 15:45:51,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:45:55,026 INFO L130 PetriNetUnfolder]: 9600/16078 cut-off events. [2023-08-30 15:45:55,027 INFO L131 PetriNetUnfolder]: For 145875/145905 co-relation queries the response was YES. [2023-08-30 15:45:55,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84537 conditions, 16078 events. 9600/16078 cut-off events. For 145875/145905 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 118754 event pairs, 2684 based on Foata normal form. 104/14519 useless extension candidates. Maximal degree in co-relation 84471. Up to 9592 conditions per place. [2023-08-30 15:45:55,159 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 415 selfloop transitions, 116 changer transitions 26/559 dead transitions. [2023-08-30 15:45:55,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 559 transitions, 7981 flow [2023-08-30 15:45:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 15:45:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 15:45:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2402 transitions. [2023-08-30 15:45:55,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3651565825478869 [2023-08-30 15:45:55,162 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2402 transitions. [2023-08-30 15:45:55,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2402 transitions. [2023-08-30 15:45:55,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:45:55,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2402 transitions. [2023-08-30 15:45:55,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 109.18181818181819) internal successors, (2402), 22 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:55,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 299.0) internal successors, (6877), 23 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:55,170 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 299.0) internal successors, (6877), 23 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:55,170 INFO L175 Difference]: Start difference. First operand has 221 places, 406 transitions, 5983 flow. Second operand 22 states and 2402 transitions. [2023-08-30 15:45:55,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 559 transitions, 7981 flow [2023-08-30 15:45:56,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 559 transitions, 7699 flow, removed 122 selfloop flow, removed 8 redundant places. [2023-08-30 15:45:56,163 INFO L231 Difference]: Finished difference. Result has 234 places, 394 transitions, 5771 flow [2023-08-30 15:45:56,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=5559, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5771, PETRI_PLACES=234, PETRI_TRANSITIONS=394} [2023-08-30 15:45:56,164 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 196 predicate places. [2023-08-30 15:45:56,164 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 394 transitions, 5771 flow [2023-08-30 15:45:56,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 101.6) internal successors, (3048), 30 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:45:56,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:45:56,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:45:56,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 15:45:56,368 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 15:45:56,368 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:45:56,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:45:56,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1742309498, now seen corresponding path program 4 times [2023-08-30 15:45:56,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:45:56,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679916368] [2023-08-30 15:45:56,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:45:56,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:45:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:45:56,993 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 15:45:56,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:45:56,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679916368] [2023-08-30 15:45:56,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679916368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:45:56,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968619572] [2023-08-30 15:45:56,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:45:56,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:45:56,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:45:56,995 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 15:45:56,997 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 15:45:57,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:45:57,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:45:57,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 15:45:57,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:45:57,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:45:57,391 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 15:45:57,553 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 15:45:57,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:45:59,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:59,902 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 15:45:59,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:45:59,944 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 15:46:00,176 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 15:46:00,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968619572] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:46:00,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:46:00,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 15:46:00,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655416485] [2023-08-30 15:46:00,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:46:00,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:46:00,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:46:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:46:00,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=689, Unknown=1, NotChecked=0, Total=812 [2023-08-30 15:46:02,235 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 15:46:04,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:46:06,697 WARN L539 Checker$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 15:46:08,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:46:10,946 WARN L539 Checker$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 15:46:11,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 15:46:11,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 394 transitions, 5771 flow. Second operand has 29 states, 29 states have (on average 101.55172413793103) internal successors, (2945), 29 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:11,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:46:11,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 15:46:11,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:46:13,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:46:16,052 WARN L539 Checker$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 15:46:18,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:46:20,731 WARN L539 Checker$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 15:46:29,581 WARN L222 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 52 DAG size of output: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:46:38,052 WARN L222 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 61 DAG size of output: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:46:40,549 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 15:46:42,355 INFO L130 PetriNetUnfolder]: 9947/16489 cut-off events. [2023-08-30 15:46:42,355 INFO L131 PetriNetUnfolder]: For 139309/139417 co-relation queries the response was YES. [2023-08-30 15:46:42,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86594 conditions, 16489 events. 9947/16489 cut-off events. For 139309/139417 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 120405 event pairs, 3502 based on Foata normal form. 31/14710 useless extension candidates. Maximal degree in co-relation 86525. Up to 11930 conditions per place. [2023-08-30 15:46:42,500 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 443 selfloop transitions, 150 changer transitions 10/605 dead transitions. [2023-08-30 15:46:42,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 605 transitions, 8467 flow [2023-08-30 15:46:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 15:46:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 15:46:42,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3244 transitions. [2023-08-30 15:46:42,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3616499442586399 [2023-08-30 15:46:42,505 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3244 transitions. [2023-08-30 15:46:42,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3244 transitions. [2023-08-30 15:46:42,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:46:42,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3244 transitions. [2023-08-30 15:46:42,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 108.13333333333334) internal successors, (3244), 30 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:42,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 299.0) internal successors, (9269), 31 states have internal predecessors, (9269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:42,516 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 299.0) internal successors, (9269), 31 states have internal predecessors, (9269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:42,516 INFO L175 Difference]: Start difference. First operand has 234 places, 394 transitions, 5771 flow. Second operand 30 states and 3244 transitions. [2023-08-30 15:46:42,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 605 transitions, 8467 flow [2023-08-30 15:46:43,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 605 transitions, 8205 flow, removed 48 selfloop flow, removed 15 redundant places. [2023-08-30 15:46:43,157 INFO L231 Difference]: Finished difference. Result has 250 places, 427 transitions, 6503 flow [2023-08-30 15:46:43,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=5508, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6503, PETRI_PLACES=250, PETRI_TRANSITIONS=427} [2023-08-30 15:46:43,158 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 212 predicate places. [2023-08-30 15:46:43,159 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 427 transitions, 6503 flow [2023-08-30 15:46:43,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 101.55172413793103) internal successors, (2945), 29 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:43,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:46:43,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:46:43,164 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 15:46:43,360 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 15:46:43,361 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:46:43,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:46:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash -54356009, now seen corresponding path program 4 times [2023-08-30 15:46:43,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:46:43,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643051841] [2023-08-30 15:46:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:46:43,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:46:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:46:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:46:43,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:46:43,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643051841] [2023-08-30 15:46:43,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643051841] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:46:43,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970831413] [2023-08-30 15:46:43,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:46:43,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:46:43,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:46:43,837 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 15:46:43,844 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 15:46:43,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:46:43,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:46:43,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 15:46:43,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:46:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:46:44,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:46:44,150 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 15:46:44,151 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 15:46:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:46:44,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970831413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:46:44,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:46:44,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2023-08-30 15:46:44,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549793459] [2023-08-30 15:46:44,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:46:44,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 15:46:44,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:46:44,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 15:46:44,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-08-30 15:46:44,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 299 [2023-08-30 15:46:44,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 427 transitions, 6503 flow. Second operand has 21 states, 21 states have (on average 121.80952380952381) internal successors, (2558), 21 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:44,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:46:44,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 299 [2023-08-30 15:46:44,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:46:48,284 INFO L130 PetriNetUnfolder]: 11985/19817 cut-off events. [2023-08-30 15:46:48,284 INFO L131 PetriNetUnfolder]: For 240573/240573 co-relation queries the response was YES. [2023-08-30 15:46:48,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110778 conditions, 19817 events. 11985/19817 cut-off events. For 240573/240573 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 148481 event pairs, 2713 based on Foata normal form. 400/18169 useless extension candidates. Maximal degree in co-relation 110707. Up to 11279 conditions per place. [2023-08-30 15:46:48,465 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 367 selfloop transitions, 263 changer transitions 16/648 dead transitions. [2023-08-30 15:46:48,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 648 transitions, 9864 flow [2023-08-30 15:46:48,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:46:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:46:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3005 transitions. [2023-08-30 15:46:48,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436963792351316 [2023-08-30 15:46:48,468 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3005 transitions. [2023-08-30 15:46:48,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3005 transitions. [2023-08-30 15:46:48,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:46:48,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3005 transitions. [2023-08-30 15:46:48,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 130.65217391304347) internal successors, (3005), 23 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:48,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 299.0) internal successors, (7176), 24 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:48,477 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 299.0) internal successors, (7176), 24 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:48,477 INFO L175 Difference]: Start difference. First operand has 250 places, 427 transitions, 6503 flow. Second operand 23 states and 3005 transitions. [2023-08-30 15:46:48,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 648 transitions, 9864 flow [2023-08-30 15:46:49,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 648 transitions, 9650 flow, removed 60 selfloop flow, removed 14 redundant places. [2023-08-30 15:46:49,762 INFO L231 Difference]: Finished difference. Result has 262 places, 469 transitions, 8053 flow [2023-08-30 15:46:49,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=6141, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8053, PETRI_PLACES=262, PETRI_TRANSITIONS=469} [2023-08-30 15:46:49,763 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 224 predicate places. [2023-08-30 15:46:49,763 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 469 transitions, 8053 flow [2023-08-30 15:46:49,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 121.80952380952381) internal successors, (2558), 21 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:49,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:46:49,764 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:46:49,768 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 15:46:49,964 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 15:46:49,964 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:46:49,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:46:49,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1778042016, now seen corresponding path program 2 times [2023-08-30 15:46:49,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:46:49,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381302679] [2023-08-30 15:46:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:46:49,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:46:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:46:50,727 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 15:46:50,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:46:50,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381302679] [2023-08-30 15:46:50,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381302679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:46:50,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881122533] [2023-08-30 15:46:50,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:46:50,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:46:50,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:46:50,733 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 15:46:50,760 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 15:46:50,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:46:50,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:46:50,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 15:46:50,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:46:50,965 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 15:46:51,003 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 15:46:51,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:46:51,151 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 15:46:51,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:46:51,341 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 15:46:51,431 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 15:46:51,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:46:53,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:46:53,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 85 [2023-08-30 15:46:53,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:46:53,981 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 1050 treesize of output 969 [2023-08-30 15:46:54,006 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 203 treesize of output 175 [2023-08-30 15:46:54,024 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:46:54,024 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 242 treesize of output 208 [2023-08-30 15:46:54,054 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:46:54,054 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 155 treesize of output 159 [2023-08-30 15:46:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:46:55,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881122533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:46:55,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:46:55,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 15:46:55,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291603791] [2023-08-30 15:46:55,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:46:55,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 15:46:55,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:46:55,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 15:46:55,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=845, Unknown=4, NotChecked=0, Total=992 [2023-08-30 15:46:55,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 299 [2023-08-30 15:46:55,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 469 transitions, 8053 flow. Second operand has 32 states, 32 states have (on average 95.5) internal successors, (3056), 32 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:46:55,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:46:55,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 299 [2023-08-30 15:46:55,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:46:58,519 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 15:47:12,100 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 15:47:14,219 INFO L130 PetriNetUnfolder]: 9965/16504 cut-off events. [2023-08-30 15:47:14,219 INFO L131 PetriNetUnfolder]: For 221462/221462 co-relation queries the response was YES. [2023-08-30 15:47:14,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96159 conditions, 16504 events. 9965/16504 cut-off events. For 221462/221462 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 120318 event pairs, 2823 based on Foata normal form. 152/14958 useless extension candidates. Maximal degree in co-relation 96082. Up to 9567 conditions per place. [2023-08-30 15:47:14,356 INFO L137 encePairwiseOnDemand]: 285/299 looper letters, 509 selfloop transitions, 142 changer transitions 21/674 dead transitions. [2023-08-30 15:47:14,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 674 transitions, 11079 flow [2023-08-30 15:47:14,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 15:47:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 15:47:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3057 transitions. [2023-08-30 15:47:14,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34080267558528426 [2023-08-30 15:47:14,360 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3057 transitions. [2023-08-30 15:47:14,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3057 transitions. [2023-08-30 15:47:14,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:47:14,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3057 transitions. [2023-08-30 15:47:14,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 101.9) internal successors, (3057), 30 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:47:14,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 299.0) internal successors, (9269), 31 states have internal predecessors, (9269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:47:14,369 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 299.0) internal successors, (9269), 31 states have internal predecessors, (9269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:47:14,369 INFO L175 Difference]: Start difference. First operand has 262 places, 469 transitions, 8053 flow. Second operand 30 states and 3057 transitions. [2023-08-30 15:47:14,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 674 transitions, 11079 flow [2023-08-30 15:47:15,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 674 transitions, 10160 flow, removed 314 selfloop flow, removed 14 redundant places. [2023-08-30 15:47:15,587 INFO L231 Difference]: Finished difference. Result has 284 places, 507 transitions, 8347 flow [2023-08-30 15:47:15,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=7198, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8347, PETRI_PLACES=284, PETRI_TRANSITIONS=507} [2023-08-30 15:47:15,588 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 246 predicate places. [2023-08-30 15:47:15,588 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 507 transitions, 8347 flow [2023-08-30 15:47:15,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 95.5) internal successors, (3056), 32 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:47:15,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:47:15,589 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:47:15,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 15:47:15,793 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 15:47:15,794 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:47:15,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:47:15,794 INFO L85 PathProgramCache]: Analyzing trace with hash 922981431, now seen corresponding path program 2 times [2023-08-30 15:47:15,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:47:15,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226222595] [2023-08-30 15:47:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:47:15,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:47:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:47:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:47:17,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:47:17,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226222595] [2023-08-30 15:47:17,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226222595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:47:17,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749162105] [2023-08-30 15:47:17,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:47:17,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:47:17,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:47:17,294 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 15:47:17,295 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 15:47:17,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:47:17,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:47:17,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 15:47:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:47:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:47:17,636 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 15:47:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 15:47:17,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:47:17,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:47:17,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2023-08-30 15:47:17,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-08-30 15:47:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:47:18,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749162105] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:47:18,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:47:18,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 7] total 24 [2023-08-30 15:47:18,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968397661] [2023-08-30 15:47:18,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:47:18,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 15:47:18,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:47:18,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 15:47:18,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=542, Unknown=1, NotChecked=0, Total=650 [2023-08-30 15:47:19,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 299 [2023-08-30 15:47:19,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 507 transitions, 8347 flow. Second operand has 26 states, 26 states have (on average 96.76923076923077) internal successors, (2516), 26 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:47:19,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:47:19,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 299 [2023-08-30 15:47:19,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:47:24,184 INFO L130 PetriNetUnfolder]: 12193/20051 cut-off events. [2023-08-30 15:47:24,184 INFO L131 PetriNetUnfolder]: For 248305/248305 co-relation queries the response was YES. [2023-08-30 15:47:24,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121900 conditions, 20051 events. 12193/20051 cut-off events. For 248305/248305 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 148848 event pairs, 2580 based on Foata normal form. 341/18352 useless extension candidates. Maximal degree in co-relation 121816. Up to 11172 conditions per place. [2023-08-30 15:47:24,407 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 542 selfloop transitions, 215 changer transitions 23/782 dead transitions. [2023-08-30 15:47:24,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 782 transitions, 12856 flow [2023-08-30 15:47:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:47:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:47:24,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2427 transitions. [2023-08-30 15:47:24,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35291551548640393 [2023-08-30 15:47:24,410 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2427 transitions. [2023-08-30 15:47:24,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2427 transitions. [2023-08-30 15:47:24,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:47:24,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2427 transitions. [2023-08-30 15:47:24,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 105.52173913043478) internal successors, (2427), 23 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 15:47:24,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 299.0) internal successors, (7176), 24 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:47:24,415 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 299.0) internal successors, (7176), 24 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:47:24,416 INFO L175 Difference]: Start difference. First operand has 284 places, 507 transitions, 8347 flow. Second operand 23 states and 2427 transitions. [2023-08-30 15:47:24,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 782 transitions, 12856 flow [2023-08-30 15:47:25,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 782 transitions, 12469 flow, removed 101 selfloop flow, removed 15 redundant places. [2023-08-30 15:47:25,728 INFO L231 Difference]: Finished difference. Result has 295 places, 582 transitions, 9930 flow [2023-08-30 15:47:25,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=7873, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9930, PETRI_PLACES=295, PETRI_TRANSITIONS=582} [2023-08-30 15:47:25,729 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 257 predicate places. [2023-08-30 15:47:25,729 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 582 transitions, 9930 flow [2023-08-30 15:47:25,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 96.76923076923077) internal successors, (2516), 26 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:47:25,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:47:25,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:47:25,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 15:47:25,930 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 15:47:25,930 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:47:25,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:47:25,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1000824374, now seen corresponding path program 1 times [2023-08-30 15:47:25,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:47:25,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824818912] [2023-08-30 15:47:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:47:25,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:47:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:47:26,473 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 15:47:26,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:47:26,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824818912] [2023-08-30 15:47:26,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824818912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:47:26,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176659354] [2023-08-30 15:47:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:47:26,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:47:26,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:47:26,474 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 15:47:26,476 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 15:47:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:47:26,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 15:47:26,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:47:26,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:47:26,803 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 15:47:26,979 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 15:47:26,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:47:27,223 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 15:47:27,224 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 99 [2023-08-30 15:47:27,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:47:27,241 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 47 [2023-08-30 15:47:27,889 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 15:47:27,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176659354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:47:27,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:47:27,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 15:47:27,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096748194] [2023-08-30 15:47:27,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:47:27,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:47:27,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:47:27,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:47:27,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=678, Unknown=4, NotChecked=0, Total=812 [2023-08-30 15:47:30,004 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 15:47:30,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 15:47:30,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 582 transitions, 9930 flow. Second operand has 29 states, 29 states have (on average 101.75862068965517) internal successors, (2951), 29 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 15:47:30,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:47:30,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 15:47:30,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:47:43,328 WARN L222 SmtUtils]: Spent 12.30s on a formula simplification. DAG size of input: 71 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:47:45,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:47:58,836 WARN L222 SmtUtils]: Spent 12.36s on a formula simplification. DAG size of input: 76 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 15:48:00,950 WARN L539 Checker$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 15:48:03,323 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 15:48:07,276 INFO L130 PetriNetUnfolder]: 12830/21028 cut-off events. [2023-08-30 15:48:07,276 INFO L131 PetriNetUnfolder]: For 269695/269761 co-relation queries the response was YES. [2023-08-30 15:48:07,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131809 conditions, 21028 events. 12830/21028 cut-off events. For 269695/269761 co-relation queries the response was YES. Maximal size of possible extension queue 1094. Compared 158758 event pairs, 5511 based on Foata normal form. 23/18749 useless extension candidates. Maximal degree in co-relation 131721. Up to 16228 conditions per place. [2023-08-30 15:48:07,610 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 613 selfloop transitions, 124 changer transitions 30/769 dead transitions. [2023-08-30 15:48:07,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 769 transitions, 12861 flow [2023-08-30 15:48:07,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 15:48:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 15:48:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2717 transitions. [2023-08-30 15:48:07,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3634782608695652 [2023-08-30 15:48:07,613 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2717 transitions. [2023-08-30 15:48:07,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2717 transitions. [2023-08-30 15:48:07,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:48:07,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2717 transitions. [2023-08-30 15:48:07,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 108.68) internal successors, (2717), 25 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:07,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 299.0) internal successors, (7774), 26 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:07,618 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 299.0) internal successors, (7774), 26 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:07,618 INFO L175 Difference]: Start difference. First operand has 295 places, 582 transitions, 9930 flow. Second operand 25 states and 2717 transitions. [2023-08-30 15:48:07,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 769 transitions, 12861 flow [2023-08-30 15:48:09,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 769 transitions, 12174 flow, removed 316 selfloop flow, removed 9 redundant places. [2023-08-30 15:48:09,518 INFO L231 Difference]: Finished difference. Result has 311 places, 602 transitions, 9964 flow [2023-08-30 15:48:09,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=9217, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9964, PETRI_PLACES=311, PETRI_TRANSITIONS=602} [2023-08-30 15:48:09,519 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 273 predicate places. [2023-08-30 15:48:09,519 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 602 transitions, 9964 flow [2023-08-30 15:48:09,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 101.75862068965517) internal successors, (2951), 29 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 15:48:09,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:48:09,520 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:48:09,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 15:48:09,720 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 15:48:09,720 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:48:09,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:48:09,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1686348114, now seen corresponding path program 2 times [2023-08-30 15:48:09,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:48:09,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91764955] [2023-08-30 15:48:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:48:09,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:48:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:48:10,554 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 15:48:10,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:48:10,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91764955] [2023-08-30 15:48:10,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91764955] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:48:10,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23528488] [2023-08-30 15:48:10,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:48:10,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:48:10,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:48:10,556 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 15:48:10,567 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 15:48:10,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:48:10,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:48:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 15:48:10,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:48:10,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:48:10,985 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 15:48:11,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:48:11,051 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 15:48:11,270 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 15:48:11,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:48:11,713 INFO L321 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-08-30 15:48:11,713 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 190 treesize of output 190 [2023-08-30 15:48:11,736 INFO L321 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-08-30 15:48:11,737 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 154 treesize of output 126 [2023-08-30 15:48:11,756 INFO L321 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-08-30 15:48:11,756 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 91 treesize of output 81 [2023-08-30 15:48:13,037 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 15:48:13,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23528488] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:48:13,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:48:13,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 15:48:13,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881257666] [2023-08-30 15:48:13,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:48:13,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 15:48:13,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:48:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 15:48:13,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=855, Unknown=3, NotChecked=0, Total=992 [2023-08-30 15:48:15,178 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 15:48:15,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-08-30 15:48:15,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 602 transitions, 9964 flow. Second operand has 32 states, 32 states have (on average 98.59375) internal successors, (3155), 32 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:15,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:48:15,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-08-30 15:48:15,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:48:19,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:48:22,237 WARN L539 Checker$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 15:48:26,657 INFO L130 PetriNetUnfolder]: 13006/21430 cut-off events. [2023-08-30 15:48:26,658 INFO L131 PetriNetUnfolder]: For 237227/237227 co-relation queries the response was YES. [2023-08-30 15:48:26,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129579 conditions, 21430 events. 13006/21430 cut-off events. For 237227/237227 co-relation queries the response was YES. Maximal size of possible extension queue 1064. Compared 161760 event pairs, 4616 based on Foata normal form. 23/19176 useless extension candidates. Maximal degree in co-relation 129487. Up to 12907 conditions per place. [2023-08-30 15:48:26,980 INFO L137 encePairwiseOnDemand]: 290/299 looper letters, 559 selfloop transitions, 152 changer transitions 29/742 dead transitions. [2023-08-30 15:48:26,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 742 transitions, 12357 flow [2023-08-30 15:48:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 15:48:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 15:48:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2426 transitions. [2023-08-30 15:48:26,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35277010324269303 [2023-08-30 15:48:26,984 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2426 transitions. [2023-08-30 15:48:26,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2426 transitions. [2023-08-30 15:48:26,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:48:26,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2426 transitions. [2023-08-30 15:48:26,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 105.47826086956522) internal successors, (2426), 23 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:26,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 299.0) internal successors, (7176), 24 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:26,992 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 299.0) internal successors, (7176), 24 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:26,992 INFO L175 Difference]: Start difference. First operand has 311 places, 602 transitions, 9964 flow. Second operand 23 states and 2426 transitions. [2023-08-30 15:48:26,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 742 transitions, 12357 flow [2023-08-30 15:48:28,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 742 transitions, 12213 flow, removed 32 selfloop flow, removed 12 redundant places. [2023-08-30 15:48:28,581 INFO L231 Difference]: Finished difference. Result has 324 places, 608 transitions, 10339 flow [2023-08-30 15:48:28,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=9784, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10339, PETRI_PLACES=324, PETRI_TRANSITIONS=608} [2023-08-30 15:48:28,582 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 286 predicate places. [2023-08-30 15:48:28,582 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 608 transitions, 10339 flow [2023-08-30 15:48:28,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 98.59375) internal successors, (3155), 32 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:28,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:48:28,583 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:48:28,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 15:48:28,785 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 15:48:28,785 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:48:28,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:48:28,785 INFO L85 PathProgramCache]: Analyzing trace with hash 922981429, now seen corresponding path program 3 times [2023-08-30 15:48:28,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:48:28,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935366226] [2023-08-30 15:48:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:48:28,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:48:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:48:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:48:29,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:48:29,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935366226] [2023-08-30 15:48:29,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935366226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:48:29,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715084878] [2023-08-30 15:48:29,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:48:29,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:48:29,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:48:29,742 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 15:48:29,745 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 15:48:29,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:48:29,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:48:29,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 15:48:29,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:48:30,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:48:30,136 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 15:48:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:48:30,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:48:30,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:48:30,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 73 [2023-08-30 15:48:30,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 10 [2023-08-30 15:48:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:48:30,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715084878] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:48:30,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:48:30,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2023-08-30 15:48:30,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271768259] [2023-08-30 15:48:30,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:48:30,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 15:48:30,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:48:30,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 15:48:30,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=562, Unknown=5, NotChecked=0, Total=650 [2023-08-30 15:48:30,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 299 [2023-08-30 15:48:30,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 608 transitions, 10339 flow. Second operand has 26 states, 26 states have (on average 105.8076923076923) internal successors, (2751), 26 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:30,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:48:30,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 299 [2023-08-30 15:48:30,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:48:38,189 INFO L130 PetriNetUnfolder]: 16585/27035 cut-off events. [2023-08-30 15:48:38,189 INFO L131 PetriNetUnfolder]: For 391824/391824 co-relation queries the response was YES. [2023-08-30 15:48:38,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170243 conditions, 27035 events. 16585/27035 cut-off events. For 391824/391824 co-relation queries the response was YES. Maximal size of possible extension queue 1249. Compared 205701 event pairs, 5288 based on Foata normal form. 606/24966 useless extension candidates. Maximal degree in co-relation 170148. Up to 15307 conditions per place. [2023-08-30 15:48:38,654 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 620 selfloop transitions, 302 changer transitions 35/959 dead transitions. [2023-08-30 15:48:38,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 959 transitions, 16181 flow [2023-08-30 15:48:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 15:48:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 15:48:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3062 transitions. [2023-08-30 15:48:38,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37928898798464017 [2023-08-30 15:48:38,658 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3062 transitions. [2023-08-30 15:48:38,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3062 transitions. [2023-08-30 15:48:38,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:48:38,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3062 transitions. [2023-08-30 15:48:38,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 113.4074074074074) internal successors, (3062), 27 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:38,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 299.0) internal successors, (8372), 28 states have internal predecessors, (8372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:38,666 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 299.0) internal successors, (8372), 28 states have internal predecessors, (8372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:38,666 INFO L175 Difference]: Start difference. First operand has 324 places, 608 transitions, 10339 flow. Second operand 27 states and 3062 transitions. [2023-08-30 15:48:38,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 959 transitions, 16181 flow [2023-08-30 15:48:41,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 959 transitions, 15948 flow, removed 54 selfloop flow, removed 18 redundant places. [2023-08-30 15:48:41,117 INFO L231 Difference]: Finished difference. Result has 340 places, 734 transitions, 13398 flow [2023-08-30 15:48:41,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=10050, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13398, PETRI_PLACES=340, PETRI_TRANSITIONS=734} [2023-08-30 15:48:41,118 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 302 predicate places. [2023-08-30 15:48:41,118 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 734 transitions, 13398 flow [2023-08-30 15:48:41,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 105.8076923076923) internal successors, (2751), 26 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:41,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:48:41,119 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:48:41,124 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 15:48:41,319 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 15:48:41,319 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:48:41,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:48:41,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1854465270, now seen corresponding path program 3 times [2023-08-30 15:48:41,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:48:41,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238108534] [2023-08-30 15:48:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:48:41,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:48:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:48:41,983 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 15:48:41,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:48:41,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238108534] [2023-08-30 15:48:41,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238108534] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:48:41,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028841094] [2023-08-30 15:48:41,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:48:41,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:48:41,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:48:41,985 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 15:48:41,987 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 15:48:42,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:48:42,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:48:42,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 15:48:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:48:42,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:48:42,395 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 15:48:42,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:48:42,486 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 15:48:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:48:42,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:48:42,886 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:48:42,886 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 174 treesize of output 158 [2023-08-30 15:48:42,896 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 15:48:42,901 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 36 treesize of output 24 [2023-08-30 15:48:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:48:43,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028841094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:48:43,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:48:43,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 15:48:43,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440349681] [2023-08-30 15:48:43,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:48:43,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 15:48:43,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:48:43,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 15:48:43,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=823, Unknown=2, NotChecked=0, Total=992 [2023-08-30 15:48:45,969 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 15:48:46,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-08-30 15:48:46,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 734 transitions, 13398 flow. Second operand has 32 states, 32 states have (on average 98.5) internal successors, (3152), 32 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:46,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:48:46,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-08-30 15:48:46,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:48:53,086 INFO L130 PetriNetUnfolder]: 14530/23953 cut-off events. [2023-08-30 15:48:53,086 INFO L131 PetriNetUnfolder]: For 395432/395432 co-relation queries the response was YES. [2023-08-30 15:48:53,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158171 conditions, 23953 events. 14530/23953 cut-off events. For 395432/395432 co-relation queries the response was YES. Maximal size of possible extension queue 1165. Compared 184691 event pairs, 6596 based on Foata normal form. 617/22243 useless extension candidates. Maximal degree in co-relation 158069. Up to 18497 conditions per place. [2023-08-30 15:48:53,480 INFO L137 encePairwiseOnDemand]: 291/299 looper letters, 618 selfloop transitions, 50 changer transitions 63/733 dead transitions. [2023-08-30 15:48:53,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 733 transitions, 13916 flow [2023-08-30 15:48:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:48:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:48:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1674 transitions. [2023-08-30 15:48:53,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34991638795986624 [2023-08-30 15:48:53,483 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1674 transitions. [2023-08-30 15:48:53,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1674 transitions. [2023-08-30 15:48:53,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:48:53,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1674 transitions. [2023-08-30 15:48:53,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 104.625) internal successors, (1674), 16 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:53,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 299.0) internal successors, (5083), 17 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:53,488 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 299.0) internal successors, (5083), 17 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:53,488 INFO L175 Difference]: Start difference. First operand has 340 places, 734 transitions, 13398 flow. Second operand 16 states and 1674 transitions. [2023-08-30 15:48:53,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 733 transitions, 13916 flow [2023-08-30 15:48:57,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 733 transitions, 13077 flow, removed 303 selfloop flow, removed 23 redundant places. [2023-08-30 15:48:57,306 INFO L231 Difference]: Finished difference. Result has 327 places, 617 transitions, 10450 flow [2023-08-30 15:48:57,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=11179, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10450, PETRI_PLACES=327, PETRI_TRANSITIONS=617} [2023-08-30 15:48:57,307 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 289 predicate places. [2023-08-30 15:48:57,307 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 617 transitions, 10450 flow [2023-08-30 15:48:57,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 98.5) internal successors, (3152), 32 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:48:57,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:48:57,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:48:57,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 15:48:57,513 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 15:48:57,514 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:48:57,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:48:57,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1854465268, now seen corresponding path program 4 times [2023-08-30 15:48:57,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:48:57,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093949252] [2023-08-30 15:48:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:48:57,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:48:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:48:58,153 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 15:48:58,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:48:58,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093949252] [2023-08-30 15:48:58,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093949252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:48:58,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813598892] [2023-08-30 15:48:58,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:48:58,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:48:58,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:48:58,154 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 15:48:58,156 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 15:48:58,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:48:58,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:48:58,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 15:48:58,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:48:58,355 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 15 treesize of output 11 [2023-08-30 15:48:58,400 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 15:48:58,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:48:58,568 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 15:48:58,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:48:58,639 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 15:48:58,779 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 15:48:58,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:48:59,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:48:59,402 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 120 treesize of output 84 [2023-08-30 15:48:59,438 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 15:48:59,439 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 968 treesize of output 923 [2023-08-30 15:48:59,458 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:48:59,459 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 95 treesize of output 71 [2023-08-30 15:48:59,469 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 15:48:59,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:48:59,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 132 [2023-08-30 15:48:59,501 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 15:48:59,502 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 106 treesize of output 58 [2023-08-30 15:49:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:49:00,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813598892] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:49:00,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:49:00,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 15:49:00,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864077433] [2023-08-30 15:49:00,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:49:00,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 15:49:00,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:49:00,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 15:49:00,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=858, Unknown=3, NotChecked=0, Total=992 [2023-08-30 15:49:02,589 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 15:49:03,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 299 [2023-08-30 15:49:03,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 617 transitions, 10450 flow. Second operand has 32 states, 32 states have (on average 95.5) internal successors, (3056), 32 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:03,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:49:03,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 299 [2023-08-30 15:49:03,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:49:11,038 INFO L130 PetriNetUnfolder]: 13298/21622 cut-off events. [2023-08-30 15:49:11,038 INFO L131 PetriNetUnfolder]: For 285099/285099 co-relation queries the response was YES. [2023-08-30 15:49:11,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137399 conditions, 21622 events. 13298/21622 cut-off events. For 285099/285099 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 161529 event pairs, 6592 based on Foata normal form. 95/19634 useless extension candidates. Maximal degree in co-relation 137305. Up to 18809 conditions per place. [2023-08-30 15:49:11,306 INFO L137 encePairwiseOnDemand]: 291/299 looper letters, 589 selfloop transitions, 33 changer transitions 45/669 dead transitions. [2023-08-30 15:49:11,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 669 transitions, 12019 flow [2023-08-30 15:49:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 15:49:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 15:49:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1315 transitions. [2023-08-30 15:49:11,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3383071777720607 [2023-08-30 15:49:11,308 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1315 transitions. [2023-08-30 15:49:11,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1315 transitions. [2023-08-30 15:49:11,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:49:11,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1315 transitions. [2023-08-30 15:49:11,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 101.15384615384616) internal successors, (1315), 13 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:11,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 299.0) internal successors, (4186), 14 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:11,314 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 299.0) internal successors, (4186), 14 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:11,314 INFO L175 Difference]: Start difference. First operand has 327 places, 617 transitions, 10450 flow. Second operand 13 states and 1315 transitions. [2023-08-30 15:49:11,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 669 transitions, 12019 flow [2023-08-30 15:49:13,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 669 transitions, 11738 flow, removed 46 selfloop flow, removed 30 redundant places. [2023-08-30 15:49:13,433 INFO L231 Difference]: Finished difference. Result has 289 places, 590 transitions, 9708 flow [2023-08-30 15:49:13,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=10072, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9708, PETRI_PLACES=289, PETRI_TRANSITIONS=590} [2023-08-30 15:49:13,433 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 251 predicate places. [2023-08-30 15:49:13,434 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 590 transitions, 9708 flow [2023-08-30 15:49:13,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 95.5) internal successors, (3056), 32 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:13,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:49:13,434 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:49:13,439 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 15:49:13,634 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 15:49:13,635 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:49:13,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:49:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash -776034087, now seen corresponding path program 5 times [2023-08-30 15:49:13,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:49:13,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264892351] [2023-08-30 15:49:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:49:13,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:49:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:49:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:49:14,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:49:14,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264892351] [2023-08-30 15:49:14,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264892351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:49:14,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132872731] [2023-08-30 15:49:14,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:49:14,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:49:14,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:49:14,651 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 15:49:14,652 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 15:49:14,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 15:49:14,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:49:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 15:49:14,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:49:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:49:14,972 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 15:49:15,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:49:15,137 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 15:49:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:49:15,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:49:15,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:49:15,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 249 [2023-08-30 15:49:15,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 73 [2023-08-30 15:49:15,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:49:15,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 63 [2023-08-30 15:49:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:49:15,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132872731] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:49:15,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:49:15,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 29 [2023-08-30 15:49:15,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946518590] [2023-08-30 15:49:15,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:49:15,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 15:49:15,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:49:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 15:49:15,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=821, Unknown=9, NotChecked=0, Total=930 [2023-08-30 15:49:16,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-08-30 15:49:16,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 590 transitions, 9708 flow. Second operand has 31 states, 31 states have (on average 98.58064516129032) internal successors, (3056), 31 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:16,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:49:16,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-08-30 15:49:16,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:49:19,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:49:23,105 WARN L539 Checker$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 15:49:26,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:49:29,012 WARN L539 Checker$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 15:49:32,057 INFO L130 PetriNetUnfolder]: 17253/27154 cut-off events. [2023-08-30 15:49:32,057 INFO L131 PetriNetUnfolder]: For 477151/477151 co-relation queries the response was YES. [2023-08-30 15:49:32,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182643 conditions, 27154 events. 17253/27154 cut-off events. For 477151/477151 co-relation queries the response was YES. Maximal size of possible extension queue 1185. Compared 195898 event pairs, 2476 based on Foata normal form. 612/25054 useless extension candidates. Maximal degree in co-relation 182557. Up to 14689 conditions per place. [2023-08-30 15:49:32,620 INFO L137 encePairwiseOnDemand]: 284/299 looper letters, 458 selfloop transitions, 567 changer transitions 34/1061 dead transitions. [2023-08-30 15:49:32,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1061 transitions, 17982 flow [2023-08-30 15:49:32,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 15:49:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 15:49:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3412 transitions. [2023-08-30 15:49:32,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3566053511705686 [2023-08-30 15:49:32,629 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3412 transitions. [2023-08-30 15:49:32,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3412 transitions. [2023-08-30 15:49:32,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:49:32,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3412 transitions. [2023-08-30 15:49:32,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 106.625) internal successors, (3412), 32 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:32,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 299.0) internal successors, (9867), 33 states have internal predecessors, (9867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:32,637 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 299.0) internal successors, (9867), 33 states have internal predecessors, (9867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:32,637 INFO L175 Difference]: Start difference. First operand has 289 places, 590 transitions, 9708 flow. Second operand 32 states and 3412 transitions. [2023-08-30 15:49:32,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1061 transitions, 17982 flow [2023-08-30 15:49:35,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1061 transitions, 17735 flow, removed 49 selfloop flow, removed 26 redundant places. [2023-08-30 15:49:35,473 INFO L231 Difference]: Finished difference. Result has 298 places, 805 transitions, 15772 flow [2023-08-30 15:49:35,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=9509, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=15772, PETRI_PLACES=298, PETRI_TRANSITIONS=805} [2023-08-30 15:49:35,474 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 260 predicate places. [2023-08-30 15:49:35,474 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 805 transitions, 15772 flow [2023-08-30 15:49:35,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 98.58064516129032) internal successors, (3056), 31 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:35,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:49:35,475 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:49:35,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 15:49:35,681 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 15:49:35,681 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:49:35,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:49:35,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1971757054, now seen corresponding path program 5 times [2023-08-30 15:49:35,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:49:35,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834657243] [2023-08-30 15:49:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:49:35,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:49:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:49:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:49:36,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:49:36,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834657243] [2023-08-30 15:49:36,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834657243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:49:36,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928607176] [2023-08-30 15:49:36,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:49:36,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:49:36,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:49:36,838 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 15:49:36,841 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 15:49:36,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 15:49:36,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:49:36,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 15:49:36,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:49:37,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:49:37,165 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 15:49:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:49:37,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:49:37,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:49:37,525 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 98 treesize of output 100 [2023-08-30 15:49:37,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:49:37,543 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 49 treesize of output 47 [2023-08-30 15:49:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:49:37,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928607176] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:49:37,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:49:37,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 28 [2023-08-30 15:49:37,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532497938] [2023-08-30 15:49:37,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:49:37,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 15:49:37,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:49:37,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 15:49:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=771, Unknown=3, NotChecked=0, Total=870 [2023-08-30 15:49:39,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 15:49:39,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 805 transitions, 15772 flow. Second operand has 30 states, 30 states have (on average 101.6) internal successors, (3048), 30 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:39,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:49:39,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 15:49:39,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:49:42,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:49:44,258 WARN L539 Checker$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 15:49:46,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 15:49:48,902 WARN L539 Checker$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 15:49:56,161 INFO L130 PetriNetUnfolder]: 18845/29921 cut-off events. [2023-08-30 15:49:56,161 INFO L131 PetriNetUnfolder]: For 635577/635577 co-relation queries the response was YES. [2023-08-30 15:49:56,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233119 conditions, 29921 events. 18845/29921 cut-off events. For 635577/635577 co-relation queries the response was YES. Maximal size of possible extension queue 1298. Compared 222992 event pairs, 6004 based on Foata normal form. 56/26946 useless extension candidates. Maximal degree in co-relation 233022. Up to 22851 conditions per place. [2023-08-30 15:49:56,718 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 740 selfloop transitions, 343 changer transitions 16/1101 dead transitions. [2023-08-30 15:49:56,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1101 transitions, 22108 flow [2023-08-30 15:49:56,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 15:49:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 15:49:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2831 transitions. [2023-08-30 15:49:56,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641625932595832 [2023-08-30 15:49:56,721 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2831 transitions. [2023-08-30 15:49:56,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2831 transitions. [2023-08-30 15:49:56,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:49:56,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2831 transitions. [2023-08-30 15:49:56,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 108.88461538461539) internal successors, (2831), 26 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:56,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 299.0) internal successors, (8073), 27 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:56,726 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 299.0) internal successors, (8073), 27 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:49:56,726 INFO L175 Difference]: Start difference. First operand has 298 places, 805 transitions, 15772 flow. Second operand 26 states and 2831 transitions. [2023-08-30 15:49:56,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1101 transitions, 22108 flow [2023-08-30 15:50:03,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1101 transitions, 20221 flow, removed 918 selfloop flow, removed 13 redundant places. [2023-08-30 15:50:03,949 INFO L231 Difference]: Finished difference. Result has 315 places, 921 transitions, 17599 flow [2023-08-30 15:50:03,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=14283, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=17599, PETRI_PLACES=315, PETRI_TRANSITIONS=921} [2023-08-30 15:50:03,950 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 277 predicate places. [2023-08-30 15:50:03,951 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 921 transitions, 17599 flow [2023-08-30 15:50:03,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 101.6) internal successors, (3048), 30 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:03,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:03,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:03,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:04,152 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 15:50:04,152 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:04,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:04,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2025672198, now seen corresponding path program 6 times [2023-08-30 15:50:04,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:04,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75637649] [2023-08-30 15:50:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:04,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:04,689 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 15:50:04,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:04,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75637649] [2023-08-30 15:50:04,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75637649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:04,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516471471] [2023-08-30 15:50:04,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:50:04,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:04,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:04,691 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 15:50:04,693 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 15:50:04,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 15:50:04,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:50:04,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 15:50:04,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:05,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:50:05,019 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 15:50:05,077 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 15:50:05,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:05,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:05,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 73 [2023-08-30 15:50:05,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 10 [2023-08-30 15:50:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:50:05,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516471471] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:50:05,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:50:05,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2023-08-30 15:50:05,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679607298] [2023-08-30 15:50:05,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:50:05,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 15:50:05,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:05,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 15:50:05,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=564, Unknown=2, NotChecked=0, Total=650 [2023-08-30 15:50:05,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 15:50:05,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 921 transitions, 17599 flow. Second operand has 26 states, 26 states have (on average 101.8076923076923) internal successors, (2647), 26 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:05,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:05,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 15:50:05,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:14,745 INFO L130 PetriNetUnfolder]: 19276/30600 cut-off events. [2023-08-30 15:50:14,745 INFO L131 PetriNetUnfolder]: For 569464/569476 co-relation queries the response was YES. [2023-08-30 15:50:15,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222063 conditions, 30600 events. 19276/30600 cut-off events. For 569464/569476 co-relation queries the response was YES. Maximal size of possible extension queue 1305. Compared 228406 event pairs, 5172 based on Foata normal form. 95/27595 useless extension candidates. Maximal degree in co-relation 221960. Up to 21550 conditions per place. [2023-08-30 15:50:15,482 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 826 selfloop transitions, 213 changer transitions 20/1061 dead transitions. [2023-08-30 15:50:15,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1061 transitions, 21084 flow [2023-08-30 15:50:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 15:50:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 15:50:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2169 transitions. [2023-08-30 15:50:15,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36270903010033445 [2023-08-30 15:50:15,484 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2169 transitions. [2023-08-30 15:50:15,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2169 transitions. [2023-08-30 15:50:15,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:15,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2169 transitions. [2023-08-30 15:50:15,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 108.45) internal successors, (2169), 20 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:15,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 299.0) internal successors, (6279), 21 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:15,489 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 299.0) internal successors, (6279), 21 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:15,489 INFO L175 Difference]: Start difference. First operand has 315 places, 921 transitions, 17599 flow. Second operand 20 states and 2169 transitions. [2023-08-30 15:50:15,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1061 transitions, 21084 flow [2023-08-30 15:50:20,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1061 transitions, 20922 flow, removed 62 selfloop flow, removed 8 redundant places. [2023-08-30 15:50:20,912 INFO L231 Difference]: Finished difference. Result has 330 places, 935 transitions, 18437 flow [2023-08-30 15:50:20,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=17404, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=18437, PETRI_PLACES=330, PETRI_TRANSITIONS=935} [2023-08-30 15:50:20,913 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 292 predicate places. [2023-08-30 15:50:20,913 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 935 transitions, 18437 flow [2023-08-30 15:50:20,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 101.8076923076923) internal successors, (2647), 26 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:20,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:20,914 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:20,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-30 15:50:21,114 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 15:50:21,115 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:21,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:21,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2022010788, now seen corresponding path program 7 times [2023-08-30 15:50:21,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:21,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094063449] [2023-08-30 15:50:21,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:21,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:21,712 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 15:50:21,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:21,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094063449] [2023-08-30 15:50:21,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094063449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:21,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281974687] [2023-08-30 15:50:21,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:50:21,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:21,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:21,714 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 15:50:21,715 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 15:50:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:21,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 15:50:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:22,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:50:22,053 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 15:50:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:50:22,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:22,176 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1770 (Array Int Int))) (< (let ((.cse0 (* c_~front~0 4))) (+ c_~d~0 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse0)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1770) c_~queue~0.base) (+ c_~queue~0.offset .cse0 4)))) 2147483648)) is different from false [2023-08-30 15:50:22,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:22,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 73 [2023-08-30 15:50:22,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 10 [2023-08-30 15:50:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-30 15:50:22,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281974687] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:50:22,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:50:22,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-08-30 15:50:22,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231737665] [2023-08-30 15:50:22,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:50:22,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 15:50:22,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 15:50:22,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=467, Unknown=8, NotChecked=44, Total=600 [2023-08-30 15:50:22,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 15:50:22,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 935 transitions, 18437 flow. Second operand has 25 states, 25 states have (on average 101.84) internal successors, (2546), 25 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:22,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:22,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 15:50:22,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:31,399 INFO L130 PetriNetUnfolder]: 19161/30425 cut-off events. [2023-08-30 15:50:31,399 INFO L131 PetriNetUnfolder]: For 596376/596388 co-relation queries the response was YES. [2023-08-30 15:50:31,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224385 conditions, 30425 events. 19161/30425 cut-off events. For 596376/596388 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 227072 event pairs, 5287 based on Foata normal form. 38/27400 useless extension candidates. Maximal degree in co-relation 224277. Up to 21560 conditions per place. [2023-08-30 15:50:32,041 INFO L137 encePairwiseOnDemand]: 290/299 looper letters, 804 selfloop transitions, 183 changer transitions 32/1021 dead transitions. [2023-08-30 15:50:32,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1021 transitions, 21075 flow [2023-08-30 15:50:32,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 15:50:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 15:50:32,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1726 transitions. [2023-08-30 15:50:32,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36078595317725753 [2023-08-30 15:50:32,043 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1726 transitions. [2023-08-30 15:50:32,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1726 transitions. [2023-08-30 15:50:32,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:32,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1726 transitions. [2023-08-30 15:50:32,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 107.875) internal successors, (1726), 16 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:32,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 299.0) internal successors, (5083), 17 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:32,048 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 299.0) internal successors, (5083), 17 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:32,048 INFO L175 Difference]: Start difference. First operand has 330 places, 935 transitions, 18437 flow. Second operand 16 states and 1726 transitions. [2023-08-30 15:50:32,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1021 transitions, 21075 flow [2023-08-30 15:50:38,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1021 transitions, 20694 flow, removed 117 selfloop flow, removed 18 redundant places. [2023-08-30 15:50:38,483 INFO L231 Difference]: Finished difference. Result has 327 places, 926 transitions, 18200 flow [2023-08-30 15:50:38,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=17964, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=18200, PETRI_PLACES=327, PETRI_TRANSITIONS=926} [2023-08-30 15:50:38,484 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 289 predicate places. [2023-08-30 15:50:38,484 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 926 transitions, 18200 flow [2023-08-30 15:50:38,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 101.84) internal successors, (2546), 25 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:38,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:38,485 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:38,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 15:50:38,685 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 15:50:38,685 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:38,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:38,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2019959627, now seen corresponding path program 4 times [2023-08-30 15:50:38,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:38,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911636197] [2023-08-30 15:50:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:38,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:50:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:50:40,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:50:40,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911636197] [2023-08-30 15:50:40,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911636197] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:50:40,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759280539] [2023-08-30 15:50:40,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:50:40,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:50:40,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:50:40,154 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 15:50:40,156 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 15:50:40,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:50:40,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:50:40,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 15:50:40,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:50:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:50:40,479 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 15:50:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:50:40,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:50:40,584 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1823 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1823) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 1))) is different from false [2023-08-30 15:50:40,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:50:40,632 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 15:50:40,635 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 15:50:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:50:40,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759280539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:50:40,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:50:40,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 27 [2023-08-30 15:50:40,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219561968] [2023-08-30 15:50:40,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:50:40,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:50:40,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:50:40,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:50:40,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=682, Unknown=3, NotChecked=52, Total=812 [2023-08-30 15:50:40,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 299 [2023-08-30 15:50:40,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 926 transitions, 18200 flow. Second operand has 29 states, 29 states have (on average 95.6896551724138) internal successors, (2775), 29 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:40,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:50:40,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 299 [2023-08-30 15:50:40,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:50:51,112 INFO L130 PetriNetUnfolder]: 20469/32598 cut-off events. [2023-08-30 15:50:51,112 INFO L131 PetriNetUnfolder]: For 708844/708844 co-relation queries the response was YES. [2023-08-30 15:50:51,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241850 conditions, 32598 events. 20469/32598 cut-off events. For 708844/708844 co-relation queries the response was YES. Maximal size of possible extension queue 1346. Compared 245717 event pairs, 2459 based on Foata normal form. 817/30201 useless extension candidates. Maximal degree in co-relation 241744. Up to 16755 conditions per place. [2023-08-30 15:50:51,820 INFO L137 encePairwiseOnDemand]: 290/299 looper letters, 517 selfloop transitions, 617 changer transitions 13/1149 dead transitions. [2023-08-30 15:50:51,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1149 transitions, 23179 flow [2023-08-30 15:50:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 15:50:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 15:50:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2281 transitions. [2023-08-30 15:50:51,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467619337184555 [2023-08-30 15:50:51,822 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2281 transitions. [2023-08-30 15:50:51,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2281 transitions. [2023-08-30 15:50:51,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:50:51,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2281 transitions. [2023-08-30 15:50:51,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 103.68181818181819) internal successors, (2281), 22 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:51,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 299.0) internal successors, (6877), 23 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:51,828 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 299.0) internal successors, (6877), 23 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:51,828 INFO L175 Difference]: Start difference. First operand has 327 places, 926 transitions, 18200 flow. Second operand 22 states and 2281 transitions. [2023-08-30 15:50:51,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1149 transitions, 23179 flow [2023-08-30 15:50:59,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1149 transitions, 22632 flow, removed 78 selfloop flow, removed 20 redundant places. [2023-08-30 15:50:59,636 INFO L231 Difference]: Finished difference. Result has 328 places, 975 transitions, 20942 flow [2023-08-30 15:50:59,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=17301, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=20942, PETRI_PLACES=328, PETRI_TRANSITIONS=975} [2023-08-30 15:50:59,637 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 290 predicate places. [2023-08-30 15:50:59,637 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 975 transitions, 20942 flow [2023-08-30 15:50:59,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.6896551724138) internal successors, (2775), 29 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:50:59,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:50:59,637 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:50:59,642 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 15:50:59,838 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 15:50:59,838 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:50:59,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:50:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1046601165, now seen corresponding path program 8 times [2023-08-30 15:50:59,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:50:59,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946280261] [2023-08-30 15:50:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:50:59,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:50:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:51:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:51:00,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:51:00,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946280261] [2023-08-30 15:51:00,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946280261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:51:00,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066200059] [2023-08-30 15:51:00,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:51:00,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:51:00,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:51:00,571 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 15:51:00,573 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 15:51:00,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:51:00,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:51:00,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 15:51:00,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:51:00,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:51:00,956 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 15:51:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:51:00,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:51:01,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:51:01,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 73 [2023-08-30 15:51:01,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 10 [2023-08-30 15:51:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:51:01,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066200059] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:51:01,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:51:01,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2023-08-30 15:51:01,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725851563] [2023-08-30 15:51:01,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:51:01,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 15:51:01,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:51:01,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 15:51:01,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=659, Unknown=5, NotChecked=0, Total=756 [2023-08-30 15:51:02,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 15:51:02,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 975 transitions, 20942 flow. Second operand has 28 states, 28 states have (on average 101.75) internal successors, (2849), 28 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:02,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:51:02,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 15:51:02,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:51:05,101 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 15:51:18,356 INFO L130 PetriNetUnfolder]: 24212/38457 cut-off events. [2023-08-30 15:51:18,356 INFO L131 PetriNetUnfolder]: For 1021715/1021715 co-relation queries the response was YES. [2023-08-30 15:51:19,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304324 conditions, 38457 events. 24212/38457 cut-off events. For 1021715/1021715 co-relation queries the response was YES. Maximal size of possible extension queue 1507. Compared 295241 event pairs, 6779 based on Foata normal form. 619/35233 useless extension candidates. Maximal degree in co-relation 304214. Up to 23847 conditions per place. [2023-08-30 15:51:19,247 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 971 selfloop transitions, 368 changer transitions 28/1369 dead transitions. [2023-08-30 15:51:19,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1369 transitions, 29079 flow [2023-08-30 15:51:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 15:51:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 15:51:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3173 transitions. [2023-08-30 15:51:19,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3659324184061815 [2023-08-30 15:51:19,250 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3173 transitions. [2023-08-30 15:51:19,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3173 transitions. [2023-08-30 15:51:19,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:51:19,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3173 transitions. [2023-08-30 15:51:19,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 109.41379310344827) internal successors, (3173), 29 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:19,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 299.0) internal successors, (8970), 30 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:19,256 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 299.0) internal successors, (8970), 30 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:19,256 INFO L175 Difference]: Start difference. First operand has 328 places, 975 transitions, 20942 flow. Second operand 29 states and 3173 transitions. [2023-08-30 15:51:19,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1369 transitions, 29079 flow [2023-08-30 15:51:32,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1369 transitions, 28077 flow, removed 406 selfloop flow, removed 11 redundant places. [2023-08-30 15:51:32,956 INFO L231 Difference]: Finished difference. Result has 353 places, 1104 transitions, 24256 flow [2023-08-30 15:51:32,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=19970, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=24256, PETRI_PLACES=353, PETRI_TRANSITIONS=1104} [2023-08-30 15:51:32,958 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 315 predicate places. [2023-08-30 15:51:32,958 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1104 transitions, 24256 flow [2023-08-30 15:51:32,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 101.75) internal successors, (2849), 28 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:32,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:51:32,959 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:51:32,965 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 15:51:33,164 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 15:51:33,164 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:51:33,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:51:33,165 INFO L85 PathProgramCache]: Analyzing trace with hash -897174429, now seen corresponding path program 9 times [2023-08-30 15:51:33,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:51:33,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146366899] [2023-08-30 15:51:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:51:33,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:51:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:51:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:51:34,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:51:34,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146366899] [2023-08-30 15:51:34,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146366899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:51:34,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089764684] [2023-08-30 15:51:34,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:51:34,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:51:34,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:51:34,358 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 15:51:34,360 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 15:51:34,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 15:51:34,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:51:34,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 15:51:34,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:51:34,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:51:34,685 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 15:51:34,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:51:34,730 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 15:51:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:51:34,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:51:35,299 INFO L321 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-08-30 15:51:35,299 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 190 treesize of output 190 [2023-08-30 15:51:35,322 INFO L321 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-08-30 15:51:35,322 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 154 treesize of output 126 [2023-08-30 15:51:35,341 INFO L321 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-08-30 15:51:35,341 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 91 treesize of output 81 [2023-08-30 15:51:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 15:51:35,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089764684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:51:35,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:51:35,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 27 [2023-08-30 15:51:35,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515271544] [2023-08-30 15:51:35,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:51:35,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 15:51:35,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:51:35,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 15:51:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=684, Unknown=3, NotChecked=0, Total=812 [2023-08-30 15:51:36,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-08-30 15:51:36,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1104 transitions, 24256 flow. Second operand has 29 states, 29 states have (on average 98.62068965517241) internal successors, (2860), 29 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:51:36,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:51:36,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-08-30 15:51:36,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:51:43,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:51:45,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:51:48,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:51:50,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:51:52,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:51:54,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:51:57,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:51:59,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:52:01,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:52:04,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 15:52:19,633 INFO L130 PetriNetUnfolder]: 31946/51084 cut-off events. [2023-08-30 15:52:19,633 INFO L131 PetriNetUnfolder]: For 1368031/1368031 co-relation queries the response was YES. [2023-08-30 15:52:20,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411896 conditions, 51084 events. 31946/51084 cut-off events. For 1368031/1368031 co-relation queries the response was YES. Maximal size of possible extension queue 2219. Compared 413146 event pairs, 4896 based on Foata normal form. 246/46316 useless extension candidates. Maximal degree in co-relation 411778. Up to 27425 conditions per place. [2023-08-30 15:52:21,122 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 935 selfloop transitions, 811 changer transitions 30/1778 dead transitions. [2023-08-30 15:52:21,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1778 transitions, 38801 flow [2023-08-30 15:52:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 15:52:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 15:52:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4594 transitions. [2023-08-30 15:52:21,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573150812786809 [2023-08-30 15:52:21,127 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4594 transitions. [2023-08-30 15:52:21,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4594 transitions. [2023-08-30 15:52:21,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:52:21,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4594 transitions. [2023-08-30 15:52:21,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 106.83720930232558) internal successors, (4594), 43 states have internal predecessors, (4594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:52:21,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 299.0) internal successors, (13156), 44 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:52:21,137 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 299.0) internal successors, (13156), 44 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:52:21,137 INFO L175 Difference]: Start difference. First operand has 353 places, 1104 transitions, 24256 flow. Second operand 43 states and 4594 transitions. [2023-08-30 15:52:21,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1778 transitions, 38801 flow [2023-08-30 15:52:44,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1778 transitions, 38220 flow, removed 212 selfloop flow, removed 14 redundant places. [2023-08-30 15:52:44,266 INFO L231 Difference]: Finished difference. Result has 392 places, 1489 transitions, 35747 flow [2023-08-30 15:52:44,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=23825, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=35747, PETRI_PLACES=392, PETRI_TRANSITIONS=1489} [2023-08-30 15:52:44,267 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 354 predicate places. [2023-08-30 15:52:44,267 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1489 transitions, 35747 flow [2023-08-30 15:52:44,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 98.62068965517241) internal successors, (2860), 29 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:52:44,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:52:44,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:52:44,274 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 15:52:44,470 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 15:52:44,470 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:52:44,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:52:44,470 INFO L85 PathProgramCache]: Analyzing trace with hash -812122626, now seen corresponding path program 10 times [2023-08-30 15:52:44,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:52:44,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101848190] [2023-08-30 15:52:44,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:52:44,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:52:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:52:45,284 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 15:52:45,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:52:45,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101848190] [2023-08-30 15:52:45,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101848190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:52:45,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341447619] [2023-08-30 15:52:45,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:52:45,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:52:45,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:52:45,286 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 15:52:45,288 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 15:52:45,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:52:45,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:52:45,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 15:52:45,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:52:45,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:52:45,657 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 15:52:45,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:52:45,888 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 15:52:45,939 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 15:52:45,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:52:46,324 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 15:52:46,324 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 272 treesize of output 243 [2023-08-30 15:52:46,335 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 84 treesize of output 72 [2023-08-30 15:52:46,357 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 15:52:46,357 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 70 treesize of output 65 [2023-08-30 15:52:47,149 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 15:52:47,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341447619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:52:47,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:52:47,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 15:52:47,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411824961] [2023-08-30 15:52:47,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:52:47,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 15:52:47,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:52:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 15:52:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=852, Unknown=2, NotChecked=0, Total=992 [2023-08-30 15:52:47,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 299 [2023-08-30 15:52:47,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1489 transitions, 35747 flow. Second operand has 32 states, 32 states have (on average 95.5) internal successors, (3056), 32 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:52:47,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:52:47,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 299 [2023-08-30 15:52:47,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:53:07,599 INFO L130 PetriNetUnfolder]: 31822/51277 cut-off events. [2023-08-30 15:53:07,599 INFO L131 PetriNetUnfolder]: For 1432044/1432044 co-relation queries the response was YES. [2023-08-30 15:53:08,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426889 conditions, 51277 events. 31822/51277 cut-off events. For 1432044/1432044 co-relation queries the response was YES. Maximal size of possible extension queue 2316. Compared 425037 event pairs, 16079 based on Foata normal form. 76/46558 useless extension candidates. Maximal degree in co-relation 426759. Up to 48377 conditions per place. [2023-08-30 15:53:09,169 INFO L137 encePairwiseOnDemand]: 292/299 looper letters, 1461 selfloop transitions, 4 changer transitions 43/1510 dead transitions. [2023-08-30 15:53:09,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1510 transitions, 38863 flow [2023-08-30 15:53:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 15:53:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 15:53:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 997 transitions. [2023-08-30 15:53:09,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33344481605351173 [2023-08-30 15:53:09,171 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 997 transitions. [2023-08-30 15:53:09,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 997 transitions. [2023-08-30 15:53:09,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:53:09,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 997 transitions. [2023-08-30 15:53:09,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 99.7) internal successors, (997), 10 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:53:09,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 299.0) internal successors, (3289), 11 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:53:09,174 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 299.0) internal successors, (3289), 11 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:53:09,174 INFO L175 Difference]: Start difference. First operand has 392 places, 1489 transitions, 35747 flow. Second operand 10 states and 997 transitions. [2023-08-30 15:53:09,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1510 transitions, 38863 flow [2023-08-30 15:53:49,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1510 transitions, 36028 flow, removed 1183 selfloop flow, removed 21 redundant places. [2023-08-30 15:53:49,762 INFO L231 Difference]: Finished difference. Result has 375 places, 1467 transitions, 32544 flow [2023-08-30 15:53:49,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=32860, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=32544, PETRI_PLACES=375, PETRI_TRANSITIONS=1467} [2023-08-30 15:53:49,763 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 337 predicate places. [2023-08-30 15:53:49,763 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 1467 transitions, 32544 flow [2023-08-30 15:53:49,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 95.5) internal successors, (3056), 32 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:53:49,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:53:49,764 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:53:49,769 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 15:53:49,969 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 15:53:49,969 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:53:49,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:53:49,969 INFO L85 PathProgramCache]: Analyzing trace with hash -606321305, now seen corresponding path program 5 times [2023-08-30 15:53:49,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:53:49,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284262052] [2023-08-30 15:53:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:53:49,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:53:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:53:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:53:50,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:53:50,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284262052] [2023-08-30 15:53:50,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284262052] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:53:50,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561531132] [2023-08-30 15:53:50,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:53:50,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:53:50,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:53:50,481 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 15:53:50,486 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 15:53:50,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 15:53:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:53:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 15:53:50,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:53:50,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:53:50,859 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 15:53:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:53:51,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:53:51,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:53:51,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2023-08-30 15:53:51,257 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 15:53:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:53:51,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561531132] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:53:51,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:53:51,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-30 15:53:51,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952314134] [2023-08-30 15:53:51,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:53:51,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 15:53:51,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:53:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 15:53:51,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1006, Unknown=4, NotChecked=0, Total=1190 [2023-08-30 15:53:53,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 299 [2023-08-30 15:53:53,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1467 transitions, 32544 flow. Second operand has 35 states, 35 states have (on average 107.54285714285714) internal successors, (3764), 35 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:53:53,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:53:53,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 299 [2023-08-30 15:53:53,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:54:26,235 INFO L130 PetriNetUnfolder]: 50021/80190 cut-off events. [2023-08-30 15:54:26,235 INFO L131 PetriNetUnfolder]: For 2245168/2245168 co-relation queries the response was YES. [2023-08-30 15:54:28,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652537 conditions, 80190 events. 50021/80190 cut-off events. For 2245168/2245168 co-relation queries the response was YES. Maximal size of possible extension queue 3649. Compared 692294 event pairs, 13474 based on Foata normal form. 343/73136 useless extension candidates. Maximal degree in co-relation 652411. Up to 40302 conditions per place. [2023-08-30 15:54:28,838 INFO L137 encePairwiseOnDemand]: 290/299 looper letters, 1554 selfloop transitions, 988 changer transitions 6/2550 dead transitions. [2023-08-30 15:54:28,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 2550 transitions, 58481 flow [2023-08-30 15:54:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 15:54:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 15:54:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4901 transitions. [2023-08-30 15:54:28,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39026915113871635 [2023-08-30 15:54:28,842 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4901 transitions. [2023-08-30 15:54:28,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4901 transitions. [2023-08-30 15:54:28,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:54:28,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4901 transitions. [2023-08-30 15:54:28,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 116.69047619047619) internal successors, (4901), 42 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:54:28,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 299.0) internal successors, (12857), 43 states have internal predecessors, (12857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:54:28,852 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 299.0) internal successors, (12857), 43 states have internal predecessors, (12857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:54:28,852 INFO L175 Difference]: Start difference. First operand has 375 places, 1467 transitions, 32544 flow. Second operand 42 states and 4901 transitions. [2023-08-30 15:54:28,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 2550 transitions, 58481 flow [2023-08-30 15:55:33,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 2550 transitions, 57753 flow, removed 342 selfloop flow, removed 8 redundant places. [2023-08-30 15:55:33,098 INFO L231 Difference]: Finished difference. Result has 406 places, 2144 transitions, 53211 flow [2023-08-30 15:55:33,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=31817, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=53211, PETRI_PLACES=406, PETRI_TRANSITIONS=2144} [2023-08-30 15:55:33,100 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 368 predicate places. [2023-08-30 15:55:33,100 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 2144 transitions, 53211 flow [2023-08-30 15:55:33,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 107.54285714285714) internal successors, (3764), 35 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:55:33,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:55:33,100 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:55:33,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-30 15:55:33,301 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 15:55:33,301 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 15:55:33,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:55:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1817385655, now seen corresponding path program 11 times [2023-08-30 15:55:33,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:55:33,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072425149] [2023-08-30 15:55:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:55:33,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:55:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:55:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:55:34,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:55:34,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072425149] [2023-08-30 15:55:34,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072425149] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:55:34,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430907821] [2023-08-30 15:55:34,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:55:34,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:55:34,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:55:34,221 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 15:55:34,221 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 15:55:34,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 15:55:34,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:55:34,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 15:55:34,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:55:34,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:55:34,586 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 15:55:34,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 15:55:34,700 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 15:55:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:55:34,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:55:34,804 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2083 (Array Int Int))) (< (+ |c_thread2Thread1of1ForFork1_~temp~0#1| c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2083) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-08-30 15:55:34,809 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2083 (Array Int Int))) (< (let ((.cse0 (* c_~front~0 4))) (+ c_~d~0 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse0)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2083) c_~queue~0.base) (+ c_~queue~0.offset .cse0 4)))) 2147483648)) is different from false [2023-08-30 15:55:34,818 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2083 (Array Int Int)) (v_ArrVal_2082 (Array Int Int))) (< (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2082)) (.cse1 (* c_~front~0 4))) (+ c_~d~0 (select (select .cse0 c_~queue~0.base) (+ c_~queue~0.offset .cse1)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2083) c_~queue~0.base) (+ c_~queue~0.offset .cse1 4)))) 2147483648)) is different from false [2023-08-30 15:55:34,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:55:34,896 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 259 treesize of output 228 [2023-08-30 15:55:34,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 73 [2023-08-30 15:55:34,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 15:55:34,915 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 45 treesize of output 26 [2023-08-30 15:55:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-30 15:55:35,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430907821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:55:35,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:55:35,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 29 [2023-08-30 15:55:35,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066674705] [2023-08-30 15:55:35,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:55:35,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 15:55:35,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:55:35,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 15:55:35,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=657, Unknown=5, NotChecked=162, Total=930 [2023-08-30 15:55:35,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-08-30 15:55:35,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 2144 transitions, 53211 flow. Second operand has 31 states, 31 states have (on average 98.58064516129032) internal successors, (3056), 31 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:55:35,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:55:35,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-08-30 15:55:35,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:56:18,640 INFO L130 PetriNetUnfolder]: 51197/82264 cut-off events. [2023-08-30 15:56:18,641 INFO L131 PetriNetUnfolder]: For 2735654/2735654 co-relation queries the response was YES. [2023-08-30 15:56:21,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697880 conditions, 82264 events. 51197/82264 cut-off events. For 2735654/2735654 co-relation queries the response was YES. Maximal size of possible extension queue 3617. Compared 716156 event pairs, 12329 based on Foata normal form. 576/75336 useless extension candidates. Maximal degree in co-relation 697735. Up to 54486 conditions per place. [2023-08-30 15:56:21,551 INFO L137 encePairwiseOnDemand]: 291/299 looper letters, 1707 selfloop transitions, 599 changer transitions 14/2322 dead transitions. [2023-08-30 15:56:21,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 2322 transitions, 60825 flow [2023-08-30 15:56:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 15:56:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 15:56:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1804 transitions. [2023-08-30 15:56:21,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35490851859138306 [2023-08-30 15:56:21,553 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1804 transitions. [2023-08-30 15:56:21,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1804 transitions. [2023-08-30 15:56:21,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:56:21,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1804 transitions. [2023-08-30 15:56:21,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 106.11764705882354) internal successors, (1804), 17 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:56:21,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 299.0) internal successors, (5382), 18 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:56:21,557 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 299.0) internal successors, (5382), 18 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:56:21,557 INFO L175 Difference]: Start difference. First operand has 406 places, 2144 transitions, 53211 flow. Second operand 17 states and 1804 transitions. [2023-08-30 15:56:21,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 2322 transitions, 60825 flow Killed by 15